View
3
Download
0
Category
Preview:
Citation preview
DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
2018-NAPS-10AUTHORS:GuanghuaMu,SunZhizhong,(ChinaNationPetroleumCorporation )
TianLei,(Xi'anAoxing EnergyTechnologyCo.LTD)
CONTENTS
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
1
2
3
4
Introduction
PrincipleandFeatures
TestingResults
Application
NAPS-XX-18/UNHOLSTERWELLPOTENTIALUSINGCONVERGINGSHOCKWAVES
INTRODUCTION
Application of Jet Perforation Technology in Oil Fields(1950s - now)
Pros and Cons:
Pros:Small, efficient and economical
Cons:Forming a compacted zone near the perforation tunnel edge, thus reducing the
permeability and blocking oil & gas flow.
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
NAPS-XX-18/UNHOLSTERWELLPOTENTIALUSINGCONVERGINGSHOCKWAVES
PRINCIPLE AND FEATURES
How to release the energy to the perforation tunnel to do work directly
thus transforming tunnel shape for better permeability?
1. The aftereffect loader made of the energy-contained material by specific formula and specially
designed charge loading structure is installed at the front end of the perforation charge.
2. When the perforation charge detonating and perforating, the high energy material in the
aftereffect loader will be pulled into the perforation tunnel by the high velocity jet.
3. The high energy material does work in the perforation tunnel, from scorching ignition to
deflagrate, producing pressure.
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
NAPS-XX-18/UNHOLSTERWELLPOTENTIALUSINGCONVERGINGSHOCKWAVES
Numerical Simulation
The key of this technology is the procedure of doing work section-by-section through a
single ignition. The particles deflagrate in the limited space and produce pressure,
acting on the compacted zone formed by the jet, transforming the shape and physical
characteristics of the perforation tunnel and improving its flow ability.
Start of blasting Jet is produced Pull-in effect
PRINCIPLE AND FEATURES
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
Aftereffect loader Detonating cord Specially-made charge carrier Perforating charge
Aftereffect Perforator
PRINCIPLE AND FEATURES
theUDPAftereffectPerforatorFieldInstallation
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
TESTING RESULTS
Energetic Material
Explosive free, high temperature, impact resistant
◆ Using polymerized multi-function
structural material, free from explosive
source or radioactive material.
◆ Stable in high temperature, safe for
transport, storage and field job.
Temp. Degree T1 (H) T2 (SH)
Rating 160℃/200h 200℃/200h
Temp. Level High Temp.Ultra High
Temp.
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
DoingworkSaferThe aftereffect loader is coaxially installed at the front end of the perforating charge. After
perforation charge ignition, the aftereffect loader is pulled into the perforation tunnel and
instantly excited, and its energy loading on the main jet acts rapidly on the formation space to
maintaining or reducing the annulus pressure of the perforator, thus effectively preventing the
perforator barrel explosion or sticking in the well.
TESTING RESULTS
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
Aftereffect Perforation Jet Perforation
Sandstone Flow Efficiency Test Single Shot on Steel Target
Flow efficiency improved by 38%。 Tunnel volume increased by 44.94%
Conventional Perforation Tunnel
PerforationDirection
Aftereffect Perforation Tunnel
TESTING RESULTS
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
APPLICATION
Aftereffect Perforation Tunnel Form
Regular Perforation
Tunnel Form
Specifications of mature aftereffect perforator
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
APPLICATION
P-T Curve Test
Jet Perf. P-T Curve
Aftereffect Perf. P-T Curve
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
APPLICATION
Aftereffect Perf. P-T Curve (DP46RDX38-1)
Aftereffect Perf. P-T Curve (692SDP-127H-5)
P-T curve shows:1. Single wave peak;2. Time diff. >30ms, no
explosion overlap;3. Amplitude > 50MPa;4. Pressure release fast
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
APPLICATION
Exp.1
Perf.
TechnologyWell No.
MechanicalSkin S
Jet Perf.
**3x 0.09**11 10.5**6x 6.77
AftereffectPerf. **2x -5.7
Exp.2 *-1x Well use the aftereffect perforation.
The oil bed in this well is a compacted sandstone with the thickness of5.1m, the average porosity of 13% and the permeability of about 10md.Before the perforation job, the predicted oil output is 20m3/d; after theaftereffect perforation job, the output reaches 150m3/d.
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
APPLICATION
Exp.3 – additional perf. in low porosity, low permeability oil field
WellBeforeaftereffectperf. Afteraftereffectperf. Fluidincrease
DailyFluidproduction m3 Water Ratio%
DailyFluidproduction m3 WaterRatio %
A**-** 0.25 100 1.65 28.1 6.6 times
B**-** 1.45 30 3.3 100.0 2.27 times
C**-** 1 90 5.16 3.1 5.16 times
Exp.4 – water injection well
Well info.
Well name **-1 **-3 **-10 **-6 **-12 **-4
Perf. Thickness
m6 6 5 6 4 5
Before job
Injection speedm3/d
0 0 0 0 0 0
Injection pressure
Mpa>18 >18 >18 >18 >18 >18
After job
Injection speedm3/d
18 12 13 9 3 11
Injection pressure
Mpa11 11 11 12 14 12
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
APPLICATION
The aftereffect perforation is a new technology based on optimization ofjet perforation with the unique principle and functional characteristics andcomparatively complex mechanism . Having achieved notable applicationeffects, this technology has been focused gradually by the oil and gasupstream industry. The development and application of this technologyhas upgraded jet perforation to a new level.
2018-NAPS-10/DISCUSSIONANDAPPLICATIONOFAFTEREFFECTPERFORATIONTECHNOLOGY
QUESTIONS?THANKYOU
2018-NAPS-10AUTHORS:GuanghuaMu,SunZhizhong,(ChinaNationPetroleumCorporation )
TianLei,(Xi'anAoxing EnergyTechnologyCo.LTD)
Recommended