Microsoft Word - Bush-1 drill proposal.doc · Web viewTABLE OF CONTENTS.TABLE OF CONTENTS2. LISTOF FIGURES2. SUMMARY / SPEC CARD3. GEOLOGY7. Geological Summary7. Reasons for Drilling.11

Bush-1 Well Proposal

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TABLE OF CONTENTS

TABLE OF CONTENTS...................................................................................2LIST OF FIGURES...........................................................................................21. SUMMARY / SPEC CARD...........................................................................32. GEOLOGY....................................................................................................7

2.a. Geological Summary........................................................................72.c. Reasons for Drilling.......................................................................112.d. Predicted Section...........................................................................11

3. WELL PROPOSAL.....................................................................................143.a. Drilling Procedure / Hole Design..................................................143.b. Evaluation and Sampling Program...............................................153.c. Reporting........................................................................................18

4. CULTURAL HERITAGE.............................................................................194.a. Requirements.................................................................................19

5. WORKPLACE HEALTH AND SAFTEY......................................................206. CONTRACTOR CONTACT LIST...............................................................237. REFERENCES...........................................................................................24

APPENDIX 1JSEA (RISK ASSESSMENT)

LIST OF FIGURES

Figure 1: Regional location of Bush-1 in ATP 644P.........................................4Figure 2: Bush-1 location on local geological map...........................................5Figure 3: Mud map to Bush-1...........................................................................6Figure 4: Stratigraphic section for formation overlying the Ipswich Coal Measures..........................................................................................................9Figure 5: Ipswich Basin Stratigraphic Section (from Pinder, 2004)................10Figure 6: Predicted section of Bush-1 based on BS001D and The Overflow-1....................................................................................................................... 12Figure 7: Well Design Diagram.......................................................................16Figure 8: Predicted time depth curve..............................................................17


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1. SUMMARY / SPEC CARDWell Name: Bush-1

Well Type: Stratigraphic Appraisal Hole

Tenure: ATP 644P

Tenure Holder: BNG Pty Ltd (a wholy owned subsidary of Arrow Energy N.L.)

Tenure Operator: Arrow Energy N.L.

Map Sheet: Tamrookum 1:25,000 Mt Lindesay 1:100,000Warwick 1:250,000

Latitude/Longitude: 28 01’ 32”S 152 54’ 16”E(GDA 94)

Easting/Northing: 490 610 E 6 899 960 N(GDA 94, Zone 56)

Elevation: 70m

Block: Lot 5 on SP 136998

Landholder: Mervyn Tilley

Nearest Town: Beaudesert (12km North-East)

Nearest Road: The Hollow Road

Directions to drill Bush-1: From Beaudesert, head west along the Boonah – Beaudesert Road After ~4.2km, turn left (south) down Sandy Creek Road At the roundabout outside the AJ Bush manufacturing plant vear left to

continue down Sandy Creek Road Approximatey 3.8km past the roundabout, turn right (west) down The

Hollow Road The drillsite is approximately 1.5km from the intersection,

approximately 150m off the track to the right

Nearest Wells: Mt Lindesay-3 (3.4km East) Tamrookum Creek-1 (16km South) BS001D (9km North)

Surface Casing Depth: 100m (10% of TD plus margin).

Main Target: Ipswich Coal Measures


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Estimated Total depth: 500m (into Chillingham Volcanics)

Net Coal thickness expected: 15m

Drilling Contractor and Rig: JD Drilling Services Rig 4

Well Abbreviation: BU2

Figure 1: Regional location of Bush-1 in ATP 644P


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Figure 2: Bush-1 location on local geological map


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Figure 3: Mud map to Bush-1


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2. GEOLOGY

2.a. Geological Summary

The Ipswich Basin is poorly defined in the south and northeast due to younger cover, but probably extends from south of Yamba in New South Wales (Valja, 1996), north to Cape Moreton on Moreton Island (Hill & Tweedale, 1955), east offshore of Moreton Island, and west to Ipswich where the boundary is the West Ipswich Fault (Day et al., 1974). The basin east of Brisbane is probably a small lobe extending northeast from the main basin (Day et al., 1974). The initial area of the basin may have been larger, but as only small outcrops remain in areas other than Ipswich, the true extent is unknown.

The Ipswich Basin sequence is thought to correlate with the Red Cliff and Evans Head Coal Measures (Wells & O'Brien, 1994a). Whether or not these were deposited in one large basin or several smaller related basins has not been determined. It is possible that the Nymboida Coal Measures are correlatable with the Ipswich Coal Measures rather than the Esk Trough, but this is uncertain. The continuity of volcanic sequences between basins suggests that they were one (Smith et al., 1998), but different relationships with the Clarence-Moreton Basin units (conformable in the south, but with an angular unconformity in the north) may suggest that they are separate (Flint et al., 1976).

The Ipswich Basin is age equivalent with the Tarong Basin, Horrane Trough, and several un-named depressions beneath the Cecil Plains Sub-basin (Day et al., 1974). These smaller basins were probably not connected with the Ipswich Basin. The Ipswich Coal Measures are dated as being Late Triassic, suggesting that deposition in the Ipswich Basin commenced after deposition in the Esk Trough and Bowen Basin had ceased (Day et al., 1974; Cranfield & Schwarzbock, 1976). There may however be older units beneath the basal volcanic sequence that were deposited synchronously with the upper units of the Esk Trough (Korsch et al., 1989).

The Ipswich Basin sequence is generally divided into the lower volcanic sequence and the upper (Ipswich Coal Measures) sedimentary sequence.

The lowest units generally assigned to the Ipswich Basin are the Brisbane Tuff, Chillingham Volcanics and several other undifferentiated volcanics (Cranfield & Schwarzbock, 1972). The volcanic rocks vary from basaltic to rhyolitic in composition, and there is a small time break between volcanism and the deposition of the overlying Ipswich Coal Measures (Smith et al. 1998). There were probably two phases of volcanic activity, the first being mafic, and the second being felsic producing a bimodal suite (Roach, 1996).

The Late Triassic Ipswich Coal Measures are divided into two sub-groups, the Kholo and the overlying Brassall Sub-groups (Cranfield & Schwarzbock, 1976b). The Khohlo Sub-group contains up to 260m of conglomerate,


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sandstone, shale, and tuff, with minor coal, breccia, and basalt. The Brassall Sub-group comprises the Tivoli, Cooneana, and Blackstone Formations. The Tivoli Formation consists of up to 240m of coarse sandstone, shale and minor coal; and the Blackstone Formation consists of up to 24m of coal, shale, and minor sandstone.

The tectonic style of the Ipswich Basin is yet to be clearly defined with suggestions of rift and compression regimes. The rifting model is consistent with the presence of a bi-modal suite of volcanic rocks (Chillingham Volcanics) underlying the basin (Roach, 1996). However recent work has shown that the region was probably in a compressional stress regime during deposition.

The Ipswich Basin is structurally dominated by a series of north-northwest trending folds and faults (Day et al., 1974; Staines et al., 1995). The most prominent fault in the Ipswich Basin is the West Ipswich fault, which dips to the west and has a normal sense of displacement. However the presence of the Ipswich Basin depocentre to the east of the fault (P. Chern, Pers. Comm.) suggests at least one period of reverse movement.

There are three major folds occurring within the Ipswich Basin; the Bundamba, Spring Mountain, and South Moreton anticlines (Cranfield & Schwarzbock, 1976b). The Bundamba anticline is a southward plunging anticline that affects only the Ipswich Basin strata (Cranfield & Schwarzbock, 1976b). The Spring Mountain anticline is low amplitude and deforms both the Ipswich and lowermost Clarence-Moreton Basin sediments.

The South Moreton anticline is described as axially faulted (Cranfield & Schwarzbock, 1976b) and consists of a series of doubly-plunging anticlines along the one axis (Russell, 1985). Rocks of the Ipswich Coal Measures were eroded from the crest of the structure before deposition of the Bundamba Group, suggesting that the structure was active between the deposition of the Ipswich and Clarence-Moreton basins (Day et al., 1974).

There are three major broad synclines described for the Ipswich Basin, all of which deform the Clarence-Moreton Basin. From west to east they are: the Archerfield syncline, the Logan River syncline, and an unnamed syncline running near the coast.

Surat Basin Clarence-Moreton Basin

Griman Creek Formation Surat Siltstone CoreenaWallumbilla

FormationDoncaster

Bungil Formation

Mooga Formation Orallo Formation

Westbourne FormationGrafton Formation

Springbok Sandstone Kangaroo Creek SandstoneMaclean Member

Birkhead FormationWalloon Coal MeasuresWalloon Coal Measures

Eurombah FormationKoukandowie Formation

Heifer Creek Member

Hutton Sandstone

Koukandowie Formation

Ma Ma Creek Member

Evergreen Formation Box Vale Member

Precipice Sandstone 58-0 Sand Ripley Road Sandstone

Raceview FormationAberdare/Laytons Range Conglomerate

Gatton Sandstone Calamia Member

Gubberamunda Sandstone


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Cre

tace

ous

Late

Early

Jura

ssic

Late

Middle

Early

Tria

ssic

Late

Figure 4: Stratigraphic section for formation overlying the Ipswich Coal Measures

Kum

bar

illa


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Figure 5: Ipswich Basin Stratigraphic Section (from Pinder, 2004)


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2.b. Previous Exploration

Exploration for petroleum in the South Moreton Anticline began in 1960 with the drilling of “The Overflow-1”. No significant hydrocarbons were discovered, however gas was noted in the mud log coming from several coal seams totaling around 13m of coal. In the 1980s, coal intersections were followed up by a fully cored coal exploration hole, BS001D, located 3km to the south-east. This well penetrated an almost barren section (~50cm of coal) effectively ceasing exploration in the area.

Very little coal seam gas exploration has been carried out to date in the whole of the Ipswich Basin. Very high gas contents (up to 15m3/t) have been recorded approximately 25km south in Rathdowney-2, and up to 11m3/t in Swanbank-2 30km to the north.

2.c. Reasons for Drilling

Bush-1 is being drilled test coal development and to gain stratigraphic control in the core of the South Moreton Anticline. The location was selected based on surface mapping to intersect the crest of the Anticline. It is predicted that there will be enhanced permeability along the anticlinal axis. The well will provide limited production data through flow tests and DSTs.

The wellsite has been situated in an open paddock to minimize landholder and environmental disturbance.

2.d. Predicted Section

Bush-1 will spud into an unknown thickness (estimated at 5m) of Tertiary alluvium. This will consist of unconsolidated to semi consolidated clays, silts, sands, and gravels. Water production or loss of circulation is possible.

Immediately below the alluvium sits the Ripley Road Sandstone consisting of fine to medium quartzose sandstones. These have a very yellow to orange colour due to iron staining. At approximately 100m, the formation should change to the Raceview formation consisting of predominately siltstones.There may be some coals and sands present. At approximately 140m, the Aberdare Conglomerate is expected. It will consist of moderately clean sands and poorly sorted conglomerates. The base of the Aberdare is expected at 150m.

The Ipswich Coal Measures unconformably underlie the Aberdare. They will contain interbedded sands, silts, muds, and coals with the possibility of rare conglomerates. It is possible that there may be some basal conglomerates and an increase in tuffs before intersecting the Chillingham Volcanics at approximately 490m. The Chilingham Volcanics will consist of andesite to rhyolitic extrusive volcanics with some interbedded silts and muds.

BS001D The Overflow-1 3025 m

Offset:0. 5.081 10.16

Ripley Road100.00 100.000

Ripley RoadRipley Road

Raceview0.00 0.000

Raceview Raceview

Aberdare Conglomerate


-100.00 -100..000


-200.00 -200..000

Tivoli Formation

-300.00 -300..000

Rathdowney

Rathdowney

-400.00 -400..000

Chillingham

Chillingham

Bush-1BS001D

-500.00 -500..000

-600.00 -600..000

-700.00 -700..000

-800.00 -800..000

The Overflow-1


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Figure 6: Predicted section of Bush-1 based on BS001D and The Overflow-1

5 04 0

3 02 0

1 0

5 04 0

3 02 0

1 0

9 08 0

7 06 0

5 04 0

3 02 0

1 0


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Formation Top (mMD)

Top (mAMSL)

Thickness Notes

Alluvium 0 +70 5Ripley Road Sandstone

5 +65 95

RaceviewFormation

100 -30 40


140 -70 10

Ipswich CoalMeasures

150 -80 340

Chillingham Volcanics

490 -420 10 Not to be fully penetrated

Table 1: Predicted Formation Tops and Thicknesses


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3. WELL PROPOSAL

3.a. Drilling Procedure / Hole Design

The following is a guide for drilling Bush-1 (Figure 7). The actual work carried out may be contingent on the results during drilling and any subsequent special instructions. In the absence of any special instructions, use the guide below.

Drilling program is as follows:

Read and understand risk assessment presented in Appendix 1 Mobilisation of drilling rig, necessary equipment and personnel to the

well site Establishment of all equipment Site preparations, including mud overflow pits, a flare pit and cellar, as

required by drilling rig. Ensure that the flare pit is a minimum distance of 30m from the well. Site offices and parking areas should also be 30m from the well.

Drilling Operations will be conducted on a 12hr per day, 7 day per week basis

Set surface conductor as required (i.e. ± one 6m length) Drill 200mm (7 7/8”) hole and set 152mm (OD) x 4.8mm Wt conductor

as required (i.e. ±6m) Drill 146mm (5 ¾”) hole to 100m (10% predicted TD plus margin) Run 114mm (OD) X 6.0mm Wt threaded surface casing (if threaded

casing is unavailable, welded may be used provided a qualified boiler- maker is used)

Cement with minimum 30% excess cement and a 10m cement plug (excess to be increased to 50% if hole conditions are poor). Cement slurry is to be mixed at the ratio of one 40kg bag of GP / portland cement and/or builders cement with 25% pozzolan (fly ash) to 25L of water and have a measured S.G. of no less than 1.64kg/L, once cement is mixed and density checked, add 1.5% (based on dry cement weight) Daracel-AF or Mira-55 accelerator. Mix for ~2mins and pump in hole immediately.

Install well head/flange for the BOP stack After 4 hours top up cement job if necessary After top-up job has set for a minimum of 2 hours, equip well with blow-

out prevention devices and a flare line on the 114mm casing string. If the density of cement slurry is between 1.64-1.71 kg/L (SG), allow

cement to set for minimum 8 hours before testing the BOP. If the density is between 1.71-1.75 kg/L (SG), allow cement to set for minimum 6 hours before testing BOP.

First conduct low-pressure test of the BOP system to 200PSI and hold for 5 mins, then conduct high pressure test at 700PSI and hold for 10 mins (casing burst pressure is 1034PSI, therefore do not exceed 900 PSI under any circumstances). Maximum acceptable pressure loss is


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20%. The operator of the BOP must be ticketed, and must be witnessed by the Arrow site representative. Arrow BOP test record to be completed and filed. Results of test must be recorded in daily report.

At all times while drilling below surface casing the driller operating the rig must have valid well control training, or be acting under the supervision of a supervisor with valid training.

Setup gas detection system on the blooie line Drill out cement from surface casing, and ~1m into formation. Pressure test surface casing integrity and formation leak-off. Record

leakoff pressures in daily report. Drill with 96mm (or similar) PCD bit to TD utilizing KCl mud as a fluid

(expected at 450m, see Section 2.d) Any water or gas kicks / flows intersected should be sampled and rates

estimated and described in detail. At TD, flush hole making sure all cuttings are out and hole is clean. A

wiper trip may be necessary if hole conditions are poor Run wireline logs. Flow test the hole as required – instructions to be given by the wellsite

geologist with consultation with head office Take gas samples (min 3) from any gas flows encountered Fill the well with clean KCl brine and cap with a 2” ball valve. Rig down and cleanup site as directed by arrow energy N.L. After drilling, a DST rig will mobilize for perm testing After DST work is finished, a rig will mobilize to P&A the well as per

petroleum regulations

3.b. Evaluation and Sampling Program

Continuous gas monitoring and recording is to be undertaken utilising a V- RAE gas detector on an agitator in the mud streak.

Cuttings samples are to be taken every 6m prior to setting the 114mm casing, then every 3m until TD. Chips will be washed and dried prior to sampling plastic cuttings trays.

Water and gas samples will be taken from any water and/or gas flows intersected.

Wireline logs consisting of Density, Gamma, Caliper, Neutron, SP, and Resistivity will be run from casing shoe to TD with Density, Gamma, and Neutron also being run through the 114mm casing string.

DST/INFO tests will be run after the drilling rig has been released from site. Tests will be subject to well results and hole condition.


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Well Diagram

Ground Level Conductor Shoe Conductor Casing:

as required

Surface Casing:114.3mm OD x 6.0mm WTHole Size: 146mm (5 3/4")

Surface Casing Shoe

96mm (4") PCD Hole

TD

Figure 7: Well Design Diagram

1 32

4 5

Intial site setupSpud hole and set Conductor as requiredDrill 146mm to ~100mSet 100m 114.3mm surface casing, wait on cement 8 hrs, test BOP, drill out cementDrill 96mm hole to ~500mWireline LoggingFlow TestingPackup 6 7 8

Estimate 12 Shifts from rig onsite to rig release


Bush-1 Predicted Time-Depth Curve

0

100

200

300

400

500

Shifts from Start of Operation1 2 3 4 5 6 7 8 9 10 11 12

Figure 8: Predicted time depth curve.

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Dep

th (m

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3.c. Reporting

Daily drilling reports will be e-mailed to the supervising geologist in the Arrow Brisbane office each evening. The reports will then be forwarded to the relevant people. Suitable phone communications will be established from the well site for additional ad-hoc reporting. The daily report will be in the approved Arrow format and contain:

Well name Date Current depth and meters drilled today Current operations summary Next 24hrs operations summary Detailed description of the days operations OHS summary Geological descriptions and interpretations Engineering summary Gas readings Drilling rate Foreseeable problems Wellsite geologist name and contact number Drillers name and contact number

The report will be sent to directors and operational staff at Arrow Energy, and the following people outside Arrow:Andy Kozak QLD DNRM [email protected]

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4. CULTURAL HERITAGE

4.a. Requirements

A search has been made of the QLD CHCU Cultural Heritage Database, and

shows no nearby sites of significance. However, when any excavations are to be

carried out, operators and site supervisors should be made aware of the

requirement to observe the ground being dug, and if any objects of significance

are discovered cease work and notify Arrow’s Culture Heritage Support Officer.

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5. WORKPLACE HEALTH AND SAFTEY

Occupational HEALTH AND SAFETY for exploration and production drilling and workover operationsRevised Monday 27th February 2006

AE = Arrow Energy NL

Safety Management Plan and Training:

Prior to commencement of the drilling program, the drilling contractor is to provide a CD ROM to the AE NL OHS Manager with the following:

o Project Safety Management Plan (the contents of which must comply with procedure E9.1.1 Contractor OHSMP Compliance Requirements of the AE OHS Management Plan),

o Drilling Procedures Manual (SOPs, SWIs etc)o Risk Management Manualo MSDS Register with contents consistent with all chemical substances

used on siteo List of all employees, sub-contractors and staff anticipated to work on

the drilling operation together with legible copies (or scanned onto CD) of evidence that all have been trained in the contractor company’s OH&S Safety Management System and Risk Management System (signed certificates etc.), vehicle licenses, industrial inductions, plant and vehicle use training (drilling qualifications/experience, Hiab, crane etc).

Drillers are required to have a current Senior First Aid Certificate (at least one qualified Senior First Aider must be on site each shift).

Drillers are required to have a current BOP introductory training certificate so that at least one BOP qualified driller shall be on the rig for each shift.

Contractor Drilling Supervisors shall be fully BOP trained and certified (Full 5- day BOP course).

The drilling contractor and crew should be aware of the geological risk assessment carried out for this drill hole by AE prior to commencing drilling operations. The risk assessment is found on the last page of this document in Appendix 1.

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AE Generic Operational Induction

Also, prior to accessing any AE operational area to carry out work, all Contractors, service providers etc are to complete the AE Generic Operational Induction. If the operational activity is in the Dalby area (Tipton West Project, Daandine Project and Kogan North Project), the AE Generic Operational Induction is to be completed at the Dalby Depot, corner of Bennie and Russell Sts, Dalby. This can be organised by contacting Nathan Williams on 07 4662 3999.

For exploration or other project areas, please contact Brisbane office on 07 31053 400, and you will be directed to the project supervisor who will organise a time and location for the induction.

Drillsite Inductions

All AE staff and contractors working on a new drill-workover site shall complete the site specific AE Drill - Workover Site Workers Induction Course, sign the Drill – Workover Site Induction Register and must be familiar with AE’s Occupational Health and Safety Policies and Procedures Manual and compliance forms located within the site hut.

All visitors to site must complete the AE Drill - Workover Site Visitors Induction Course, sign the Drill – Workover Site Induction Register and be supervised at all times when on site.

Other Site Safety Issues

The Personnel Movement Register is to be completed on arrival and departure by all site workers and visitors.

All contractors are to attend a daily Prestart Safety Meeting (minuted) to discuss and record daily safety/risk issues and compile required JSEA’s or review a relevant SOP, the titles of which are to be documented on the Prestart Meeting form. A copy of minutes and a dated and signed attendance record must be provided to the AE Site Supervisor after each daily site safety meeting.

Prior to the rig moving on site, the drilling contractor representative and the AE Site Supervisor are to agree on a site layout plan in accordance with both the Contractor’s and AE’s site requirements. This is to determine the appropriate location for the site office, site entrance, vehicle parking, emergency evacuation muster location and designated smoking area, all to be located outside the 30m ignition exclusion zone.

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The Pre-drilling and Safety Checklist is to be completed by the AE Site Supervisor prior to commencement of drilling to ensure that site layout is appropriate with safety issues addressed.

The following is a list of key instructions that must be followed:o AE have a total smoking ban within 30m of the rig and in the AE

site office on all drill - workover sites while the rig is on site. That means no smoking or ignition sources are allowed within 30m of the rig. All potential ignition sources including, but not limited to, cigarettes, matches and cigarette lighters, flash cameras and mobile phones are to be left at the site hut and are not allowed within the 30m ignition exclusion zone.

o Any person caught smoking within the 30m ignition exclusion zone will be dismissed from site. If the removal of a worker from site (for a smoking breach) results in a perceived unacceptable work safety risk, the AE Site Supervisor is authorised to shut down the rig at the Contractors expense until such time as a replacement worker is supplied at site. Smoking is allowed adjacent to the site hut in the designated smoking area only.

o PPE to be worn at all times – including hard hats, steel capped boots, eye protection (safety glasses) and long sleeve shirts and long pants. Ear protection is to be worn when working in the vicinity of operating drill rigs and compressors.

o All drill-workover site injuries-incidents are to be immediately reported to the OHS Manager (0428 193 959). Incidents involving Contractor staff are to be documented immediately by the Contractor on Contractor incident report forms with a copy provided to the AE Site Supervisor who will send a copy to the OHS Manager immediately. The Contractor will be required to report Prescribed Incidents in accordance with Schedule 2 or the Pet and Gas (Prod & Safety) Regs 2004.

o Emergency Evacuation procedures are to be discussed at the first Prestart Safety Meeting to ensure that Contractor staff and AE staff are aware of joint responsibilities in an emergency.

o Emergency response details including emergency contact number lists for all contractors on site must be posted in all site offices or accommodation units.

o No hot work is to be commenced without a Hotwork Permit.

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6. CONTRACTOR CONTACT LIST

Drilling Contractor: JD Drilling ServicesCooper Street Industrial Estate PO Box 121Chinchilla QLD 4413

John Dingley: 07 4662 7257

Gas Analysis ACS Laboratories Pty Ltd 8 Cox StWindsor QLD 4030

Nick Cox: 07 3357 1133

Geophysical Logging: Pilbara Wireline Services Unit 2/7 Pitino Crt Osborne Park, WA 6017

Office: 08 9244 4882Stuart Power: 0429 955 344Craig Dixon: 0427 000 766

DST testing Stratatek/Multiphase Technologies Inverness RdKalorama VIC 3776

Jeff Edgoose: 0427 571 601

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7. REFERENCES

CRANFIELD, L. C. AND SCHWARZBOCK, H., 1972. Nomenclature of some Mesozoic rocks in the Brisbane and Ipswich areas, Queensland.Queensland Government Mining Journal, 73: 414-416

CRANFIELD, L.C. AND SCHWARZBOCK, H., 1976. Ipswich Basin. In: R.B.Leslie, H.J. Evans and C.L. Knight (Eds), economic geology of Australia and Papua New Guinea. 3. Petroleum. Monograph Series. The Australasian Institute of Mining and Metallurgy, Parkville, Victoria, pp. 452-454.

DAY, R. W., CRANFIELD, L. C. AND SCHWARZBOCK, H., 1974.Stratigraphy and structural settings of Mesozoic basins in southeastern Queensland and northeastern New South Wales. In: A. K. Denmead,G. W. Tweedale and A. F. Wilson (Eds), A Symposium. Geological society of Australia, Queensland Division, Brisbane, pp. 319-362.

DAY, R.W., WHITAKER, W.G., MURRAY, C.G., WILSON, I.H., & GRIMES,K.G., 1983. Queensland Geology. Geological Survey of Queensland Publication, 383.

FLINT, J. C. E., LANCASTER, C. G., GOULD, R. E. and HENSEL, H. D.,1976. Some new stratigraphic data from the southern Clarence- Moreton Basin. Queensland Government Mining Journal, 77(899): 397- 401.

GOSCOMBE, P. W. and COXHEAD, B. A., 1995. Clarence-Moreton, Surat, Eromanga, Nambour, and Mulgildie Basins. In: C.R. Ward, H.J. Harrington, C.W. Mallett and J.W. Beeston (Editors), Geology of Australian coal basins. Geological Society of Australia Coal Geology Group, pp. 489-511.

HILL, D. and TWEEDALE, G. W., 1955. Geological map of the Moreton district with parts of the Darling Downs, Burnett and Wide Bay districts. Department of Mines, Queensland, Brisbane.

KORSCH, G. D., O'BRIEN, P. E., SEXTON, M. J., WAKE-DYSTER, K. D. andWELLS, A. T., 1989. Development of Mesozoic transtensional basins in easternmost Australia. Australian Journal of Earth Sciences, 36: 13-28.

PINDER, B. J., 2001. Structure of the South Moreton Anticline, Clarence- Moreton Basin. BappSc Honours Thesis, Queensland University of Technology, Brisbane.

PINDER, B.J., 2004. Coal seam gas prospectivity of the Ipswich and Clarence-Moreton Basins. In: Boult, P.J., Johns, D. R., and Land, S. C.

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(Eds), Eastern Australasian Basins Symposium II, Petroleum Exploration Society of Australia, Special Publication, pp. 339-344

POWELL, T. G., E, O. B. P. and WELLS, A. T., 1993. Petroleum prospectivity of the Clarence-Moreton Basin, eastern Australia; a geochemical perspective. Australian Journal of Earth Sciences, 40(1): 31-44.

ROACH, A., 1996. Late Triassic volcanism of the Ipswich Basin, Mesozoic Geology of the Eastern Australian Plate Conference. Geological Society of Australia, Brisbane, Queensland, pp. 476-484.

RUSSELL, T. C., 1985. A review of the geology and hydrocarbon potential of authority to prospect 266P, Moreton, Ipswich, and Esk Basins, Southeast Queensland (CR 15425 stored at DME in Brisbane), Bligh Oil and Minerals N. L., Brisbane.

SMITH, J.V., MIYAKE, Y. AND HOUSTON, E. C., 1998. Mesozoic age forvolcanic rocks at Evens Head, northeastern New South Wales. Australian Journal of Earth Sciences, 45: 955-961.

STAINES, H. R. E., FALKNER, A. J. AND THORNTON, M. P., 1995. IpswichCoalfield. In: C. R. Ward, H. J. Harrington, C. W. Mallett and J. W. Beeston (Eds), Geology of Australian coal basins. Geological Society of Australia Coal Geology Group, pp. 455-464.

VALJA, A., 1996. Structural framework map of New South Wales. New South Wales Department of Mineral Resources, Hobart.

WELLS, A. T. and O'BRIEN, P. E., 1994a. Geology of the Clarence-Moreton Basin (1:500 000 scale map). Australian Geological Survey Organisation, Canberra.

WELLS, A. T. AND O'BRIEN, P. E., 1994b. Introduction. In: A.T. Wells andP.E. O'Brien (Editors), Geology and petroleum potential of the Clarence-Moreton Basin, New South Wales and Queensland. AGSO Bulletin 241. Australian Geological Survey Organisation, Canberra, A.C.T., Australia, pp. 1-3.

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Task Description of Task

Tools, equipmentPPE

Hazards within the task Raw Risk Controls Residual

Risk

1Drilling through surfical sediments to ~5m

Drill Rig Hole Collapse 8Drill hole rapidly and do not leave open for significant lengths of time prior to running casing

5

2.

Drilling throughRipley Road Sandstone, Raceview Formation, and Aberdare Conglomerate to 150m

Drill rig Hole collapse 8

Drill with mud if hole stability is in question, don’t leave rods in hole if there are any indications of instability, give hole a thorough circulation prior to pulling rods to build up a thick mud cakeUse KCl mud to control clays

5

3.

Drilling throughIpswich Coal Measures to 490m

Drill rig Hole collapse 8

Drill with mud if hole stability is in question, don’t leave rods in hole if there are any indications of instability, give hole a thorough circulation prior to pulling rods to build up a thick mud cakeUse KCl mud to control clays

5

Gas blowout from coal 14

Use BOP rated and tested to at least 700 PSIMonitoring of mud pit levels to detect any influx into wellDrill on mud prior to setting surface casing

10

Bush-1 Well

2

Task Description of Task

Tools, equipmentPPE

Hazards within the task Raw Risk Controls Residual

Risk

Gas leaking from mud into air around rig causing fire hazard 9 Continuous gas monitoring,

eliminate ignition sources 6

Documents

Microsoft Word - Bush-1 drill proposal.doc · Web viewTABLE OF CONTENTS.TABLE OF CONTENTS2. LISTOF FIGURES2. SUMMARY / SPEC CARD3. GEOLOGY7. Geological Summary7. Reasons for Drilling.11