Upload
mago-jose
View
222
Download
1
Embed Size (px)
Citation preview
8/12/2019 DTI Perpective Reservoir Surveillance
1/24
Innovations in Reservoir Surveillance
DTI Perspective on Reservoir
Surveillance
Colin Cranfield
Reservoir Engineer
Licensing and Consents UnitAberdeen
15 September 2004
8/12/2019 DTI Perpective Reservoir Surveillance
2/24
Innovations in Reservoir Surveillance
Quote from the late Laurie Dake*
Thorough data acquisition is expensive
(very expensive) and it is the duty ofpractising reservoir engineers to convince
those who hold the purse strings of the
necessity of the exercise.
* The Practice of Reservoir Engineering
8/12/2019 DTI Perpective Reservoir Surveillance
3/24
Innovations in Reservoir Surveillance
Overview
DTI-LCU remit
PILOT initiatives
UKCS reserves
Brown field growth
Reservoir surveillance
General issues
Field observations
Conclusions
8/12/2019 DTI Perpective Reservoir Surveillance
4/24
Innovations in Reservoir Surveillance
DTI-LCU aim
Maximise economic recovery of UK oil & gas
while minimising environmental impact
8/12/2019 DTI Perpective Reservoir Surveillance
5/24
Innovations in Reservoir Surveillance
Reservoir surveillance is important throughout field
life
Need to establish economic viability of reservoir, .e.g EWTs
Gain reservoir understanding for effective management
Establish that reservoir is uneconomic prior to abandonment
Field
determination
issued
FDP
approved
Field
start-upCOP
AFRs submitted /
Addenda to FDPPre-development
discussions
Phased
development ?
8/12/2019 DTI Perpective Reservoir Surveillance
6/24
Innovations in Reservoir Surveillance
PILOT targets
Government industry partnership
Striving to meet 2010 target
8/12/2019 DTI Perpective Reservoir Surveillance
7/24
Innovations in Reservoir Surveillance
PILOT targets
Government industry partnership
Striving to meet 2010 target
Can only be achieved via
New field development
Brown field growth
Exploration success
8/12/2019 DTI Perpective Reservoir Surveillance
8/24
Innovations in Reservoir Surveillance
UK production forecast (mmboe/d)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
Possible new developments
Probable new developments upside
Brown field growth
Probable new developments
Approved fields Proven + Probable
Actual production Forecast UKCS oil and gas production 2003 - 2010
Source DTI 2003 annual reserves review
PILOT targets 2005 & 2010
8/12/2019 DTI Perpective Reservoir Surveillance
9/24
Innovations in Reservoir Surveillance
DTI initiatives
PILOT
Fallow process
Promote licences
Access to data
Infrastructure code of practice
Brown field work group
Plus
Work with ITF on technology development
IOR conferences, web sites, eNewsletter
8/12/2019 DTI Perpective Reservoir Surveillance
10/24
Innovations in Reservoir Surveillance
UKCS recovery factor distribution
Northern North SeaOil Recovery 43%
(upside 45%)
Southern North SeaGas Recovery 74%
(upside 78%)
-
Source DTI
Central North SeaOil Recovery 46%
(upside 49%)
Gas Recovery 65%(upside 71%)
Key
Oil Gas
Production to date
P+P Reserves
Possible reserves
Unrecovered
8/12/2019 DTI Perpective Reservoir Surveillance
11/24
Innovations in Reservoir Surveillance
Improving brown field recovery
Reserves % increase 1991 - 2003
0
10
20
30
40
50
60
7080
90
V-fie
ldsBe
ryl
Thist
le
Vikin
g
Maur
een
Inde
Bren
t
Lem
an
More
cambe
Cam
elot
S.Br
ae
Fulm
ar
Forti
es
Mon
Arb
Clip
per
Heathe
r
Balm
oral
Auk
Sean
IV&
RR
Source UK Oil & Gas Commemorative Volumes
8/12/2019 DTI Perpective Reservoir Surveillance
12/24
Innovations in Reservoir Surveillance
Brown field growth
Brown field WG addressing barriers
Typical success factors
Cost control Combining technologies
Technological advances
Drilling & completion
Geo-steering
Sub-sea tie-back Improved reservoir understanding
Integrated approach
3D/4D advances
8/12/2019 DTI Perpective Reservoir Surveillance
13/24
Innovations in Reservoir Surveillance
By-passed & trapped oil
Causes
Reservoir compartmentalisation
Fault shadows
Heterogeneity
Attics
Opportunities
Better utilise injection
Infill / sidetrack locations
Well work / re-perforation / water or gas shut-off
8/12/2019 DTI Perpective Reservoir Surveillance
14/24
8/12/2019 DTI Perpective Reservoir Surveillance
15/24
Innovations in Reservoir Surveillance
1) Existing wells draining effectively?
Existing B2 perforations 10383 10423 ft md
Un-perforated 10423 10470 ft md
Existing B2 perforations 10478 10498 ft md
Massive sands
un-perforated intervals
8/12/2019 DTI Perpective Reservoir Surveillance
16/24
Innovations in Reservoir Surveillance
2) Existing wells draining effectively?
8/12/2019 DTI Perpective Reservoir Surveillance
17/24
Innovations in Reservoir Surveillance
2) Existing wells draining effectively?
Un-perforated interval 11,770 11,790 ft md
Channel sands
un-perforated interval
8/12/2019 DTI Perpective Reservoir Surveillance
18/24
Innovations in Reservoir Surveillance
3) Existing wells draining effectively?
Gamma ray spikescould they be
horizontal barriers?
8/12/2019 DTI Perpective Reservoir Surveillance
19/24
Innovations in Reservoir Surveillance
Typical surveillance approaches
Routine
RFT, LWD, logging
Production performance
Non-routine
3D/4D, geochem, geomech, SrRSA
Permanent surveillance
Difficulty in estimating value
More advanced cost/benefit analysis?
8/12/2019 DTI Perpective Reservoir Surveillance
20/24
Innovations in Reservoir Surveillance
Andrew production & 4D surveys
-
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Jun
-96
Sep
-96
Dec
-96
Mar-
97
Jun
-97
Sep
-97
Dec
-97
Mar-
98
Ju
l-98
Oc
t-98
Jan
-99
Apr-
99
Ju
l-99
Oc
t-99
Jan
-00
Apr-
00
Ju
l-00
Nov
-00
Fe
b-0
1
May
-01
Aug
-01
Nov
-01
Fe
b-0
2
May
-02
Aug
-02
Dec
-02
Mar-
03
Jun
-03
Sep
-03
Dec
-03
Fluid[bbls/d]
-
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Gas[mscf/d]
Daily Water Volume bbl
Daily Oil Volume plbbl
Daily Gas Production
Baseline3D 2001 2002 2004D 4D Survey acquisition
MaximisingBrown fieldRecoveryOIL Rate
Water Rate
8/12/2019 DTI Perpective Reservoir Surveillance
21/24
Innovations in Reservoir Surveillance
Surveillance challenges past and present
Compartmentalisation
Impacted injection strategies
Hydraulic fracturing Poorly controlled water injection
Marginal / sub-sea developments
Pre-drilled wells
Based on static data Non-optimum well placement
Defer injection wells?
Inaccurate zonal allocation
Inability to model reservoir
8/12/2019 DTI Perpective Reservoir Surveillance
22/24
Innovations in Reservoir Surveillance
UKCS reserves categorised by development type
Source DTI web page
Platform Fields
Subsea tiebacks
Undeveloped
UKCS reserves
20 billion boe
Key
Developed P+P
Developed Fields Possible
SST P+P
SST Possible
Undeveloped Probable
Undeveloped Possible
Potential Additional
FPFs/FPSOs
8/12/2019 DTI Perpective Reservoir Surveillance
23/24
Innovations in Reservoir Surveillance
Way forward - reservoir surveillance
Continue to refine and improve surveillance
Down-hole flow- & pressure-meters
By zone
Continue to integrate data observations
More sophisticated analysis
Tailor strategy to specific reservoir situation
Address key uncertainties
Develop case for thorough data acquisition
8/12/2019 DTI Perpective Reservoir Surveillance
24/24
Innovations in Reservoir Surveillance
For DTI oil & gas information:
http://www.og.dti.gov.uk/
or contact:
01224 254066
Thank you for listening