CN107288571A - Integrated layered gas distribution and pressure measurement process for gas well - Google Patents
Integrated layered gas distribution and pressure measurement process for gas well Download PDFInfo
- Publication number
- CN107288571A CN107288571A CN201710546263.6A CN201710546263A CN107288571A CN 107288571 A CN107288571 A CN 107288571A CN 201710546263 A CN201710546263 A CN 201710546263A CN 107288571 A CN107288571 A CN 107288571A
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- integrated
- packer
- measuring cell
- production
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- 238000009826 distribution Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009530 blood pressure measurement Methods 0.000 title claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000005065 mining Methods 0.000 claims abstract description 18
- 238000012806 monitoring device Methods 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims abstract description 3
- 238000012360 testing method Methods 0.000 claims description 9
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 3
- 239000000725 suspension Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000008259 solid foam Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Measuring Fluid Pressure (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the technical field of oil field oil extraction engineering, and belongs to an integrated layered gas distribution and pressure measurement process for a gas well. The invention solves the problems that the conventional eccentric production allocator can only allocate one layer by throwing and fishing at one time, the process structure is complex and the operation cost is high. The device consists of a control monitoring device and an underground layered mining pipe column, wherein the control monitoring device consists of a ground controller (1), a steel wire controller (2) and a steel wire operation vehicle (3), and the underground layered mining pipe column consists of an oil pipe (4), a suspension packer (5), a Y341 integrated production allocation packer (6), a Y341 balance packer (7), a ball seat (8) and an integrated layered gas allocation pressure gauge (9); the invention has the advantages of one-time casting and fishing, capability of simultaneously realizing the capacity allocation of two different production layers and the dynamic and static pressure monitoring before and after the mouth of the production layer, simple casting and fishing process, less casting and fishing times and the like.
Description
Technical field
The present invention relates to oil extraction in oil field field of engineering technology, belong to a kind of gas well integrated form layering distribution and pressure measurement technique.
Background technology
Current gas field generally using centering type point excavating technology, the technology utilization eccentric production mandrel realize single payzone pressure measurement,
With production, a pulling can only allocate one layer, and process structure is complicated, operating cost is high.Therefore the present invention is have developed, the invented technology
Two different payzone dynamic pressure parameters are accurately measured by a pulling, foundation is provided for the production capacity allotment between each layer, it is real
Existing two payzones are allocated simultaneously, are a kind of low-cost high-efficiency technique, are met requirement of the gas field to separate zone production.
The content of the invention
It is an object of the invention to provide can a pulling realize the accurate pressure measurement of two different payzones, a kind of gas with production
Well integrated form is layered distribution and pressure measurement technique.
The present invention is realized by following device：The present apparatus is by control monitoring device and laminated distributor under well mining tubular column two
Part is constituted, and control monitoring device is made up of ground controller, steel wire controller and steel wire operation car, wherein steel wire controller
It is connected with steel wire operation car by cable and data wire；Laminated distributor under well mining tubular column is by oil pipe, hanging packer, Y341 integrated forms
With production packer, Y341 balances packer, ball seat, integrated form layering distribution measuring cell composition；Wherein ball seat upper end is put down with Y341
Packer lower contact of weighing is threadedly coupled, and Y341 balance packer top connections are connected with tubing round thread, the oil pipe other end and Y341 collection
An accepted way of doing sth is with packer lower contact threaded connection is produced, and Y341 integrated forms are with production packer top connected pipes, and the oil pipe other end is with hanging
Packer lower contact threaded connection is hung, Y341 is integrated to be layered distribution measuring cell with production packer built with integrated form；The present invention is
Realized by following steps：
A, laminated distributor under well mining tubular column is connected in the order described above first, wherein Y341 is integrated dead with being provided with production packer
The integrated form layering distribution measuring cell of mouthpiece；
B, after pressing crack construction terminates, the laminated distributor under well mining tubular column that tripping in has been connected under kill-job state；
C, packer setting：After laminated distributor under well mining tubular column tripping in production capacity desired depth, 20MPa is suppressed in oil pipe, repeatedly three
Secondary, voltage stabilizing 10min realizes hanging packer, Y341 integrated forms with production packer, three packers of Y341 balance packers simultaneously
Set；
D, tubing string and testing seal about packer：Ground is suppressed, and forms tri- pressure steps of 10-15-20MPa, and integrated form layering distribution is surveyed
Pressure instrument records the change that pressure is set inside oil pipe outside head of liquid and oil pipe respectively, and oil jacket annular space suppresses 5MPa, passes through steel
Silk controller control steel wire operation car pulls integrated form layering distribution measuring cell out, and integrated form is layered distribution measuring cell with being connected ground
Data in controller connection playback layering distribution measuring cell；If pressure curve is three pressure steps, contrast oil in oil pipe
Pressure and casing pressure value, two values are unequal, you can judge that the realizations of three packers are set, otherwise not set；
E, measurement payzone pressure：Coiled tubing gaslift recovers gas well liquid loading ability, treats the gas testing end of job, true according to oil testing result
Fixed correspondence control valve diameter, the diameter valve is loaded in integrated form layering distribution measuring cell, will it is integrated with production measuring cell and
Steel wire operation car is attached, and integrated put into production measuring cell to Y341 is integrated is matched somebody with somebody in production packer, 3 days left sides of opening well and making production
Pressure sensor measures before upper and lower two layers of mouth, static pressure is moved after mouth respectively before the right side, integrated form layering distribution measuring cell mouth, after mouth
Power；
F, determine valve diameter：Control steel wire operation car to pull integrated form out by steel wire controller to be layered distribution measuring cell, will collect
It is connected into production measuring cell with ground controller, ground data playback is obtained
Before the mouth of two different payzones, pressure curve after mouth, calculate adjustment integrated form layering distribution measuring cell according to deliverability equation
The corresponding valve diameter of interior two payzones；
G, regulation valve：The valve that previous step is determined loads in integrated form layering distribution measuring cell, will by steel wire operation car
Integrated form layering distribution measuring cell input Y341 is integrated with production packer, and drive a well operation.
Compared with the prior art the present invention has the following advantages that：
1), integrated form had both been layered the seating nipple of distribution measuring cell with production packer as integrated form in the present invention, but also with packing
The effect of gas-bearing formation, two throttling valves and three pressure sensors built in integrated form layering distribution measuring cell, a pulling can be same
The class reservoir productivities of Shi Shixian two allocate and payzone mouth before, sound state pressure monitoring after mouth, pulling technique is simple, and operating efficiency is high,
Reduce construction cost.
2）, the present invention can delivery of solid foam discharging agent and vortex drainage gas production technique in supporting oil pipe.
Brief description of the drawings：Fig. 1 is the field application general illustration of the present invention；Fig. 2 is laminated distributor under well mining tubular column schematic diagram.
Embodiment：The invention will be further described below in conjunction with the accompanying drawings, the present invention be by following device come
Realize：The present apparatus is made up of control monitoring device and laminated distributor under well mining tubular column two parts, and control monitoring device is controlled by ground
Instrument 1 processed, steel wire controller 2 and steel wire operation car 3 are constituted, and wherein steel wire controller 2 passes through cable and data with steel wire operation car 3
Line is connected；Laminated distributor under well mining tubular column is insulated by oil pipe 4, hanging packer 5, Y341 integrated forms with production packer 6, Y341 balances
Device 7, ball seat 8, integrated form layering distribution measuring cell 9 are constituted；Wherein the upper end of ball seat 8 balances the lower contact screw thread of packer 7 with Y341
Connection, the Y341 balance top connections of packer 7 are threadedly coupled with oil pipe 4, and the other end of oil pipe 4 is with Y341 integrated forms with production packer 6
Lower contact is threadedly coupled, and Y341 integrated forms are matched somebody with somebody under the production top connected pipes 4 of packer 6, the other end of oil pipe 4 and hanging packer 5
Joint
Threaded connection, Y341 is integrated to be layered distribution measuring cell 9 with production packer 6 built with integrated form；The present invention is by following
Step is realized：
A, laminated distributor under well mining tubular column is connected in the order described above first, wherein Y341 is integrated with being provided with production packer 6
The integrated form layering distribution measuring cell 9 of dead mouthpiece；
B, after pressing crack construction terminates, the laminated distributor under well mining tubular column that tripping in has been connected under kill-job state；
C, packer setting：After laminated distributor under well mining tubular column tripping in production capacity desired depth, 20MPa is suppressed in oil pipe 4, repeatedly three
Secondary, voltage stabilizing 10min realizes hanging packer 5, Y341 integrated forms with production packer 6, Y341 balance 7 three packers of packer
Set simultaneously；
D, tubing string and testing seal about packer：Ground is suppressed, and forms tri- pressure steps of 10-15-20MPa, and integrated form layering distribution is surveyed
Pressure instrument 9 records the change that pressure is set inside the outside head of liquid of oil pipe 4 and oil pipe 4 respectively, and oil jacket annular space is suppressed 5MPa, passed through
The control steel wire operation of steel wire controller 2 car 3 pulls integrated form layering distribution measuring cell 9 out, and integrated form layering distribution measuring cell 9 is with connecting
Data in the connection playback layering distribution of ground plane controller 1 measuring cell 9；If pressure curve is three pressure platforms in oil pipe 4
Rank, contrast oil pressure and casing pressure value, two values are unequal, you can judge that three packers realizations are set, otherwise not set；
E, measurement payzone pressure：The gaslift of coiled tubing 4 recovers gas well liquid loading ability, the gas testing end of job is treated, according to oil testing result
It is determined that correspondence control valve diameter, the diameter valve is loaded in integrated form layering distribution measuring cell 9, by integrated with production measuring cell
9 are attached with steel wire operation car 3, integrated put into production measuring cell 9 to Y341 is integrated are matched somebody with somebody in production packer 6, opening well and making production 3
Before it or so, the mouth of integrated form layering distribution measuring cell 9, after mouth pressure sensor measure respectively before upper and lower two layers of mouth, sound after mouth
State pressure；
F, determine valve diameter：Control steel wire operation car 3 to pull integrated form out by steel wire controller 2 and be layered distribution measuring cell 9, will
It is integrated with production measuring cell 9 be connected with ground controller 1, ground data playback, obtain two difference payzones mouth before, pressure after mouth
Curve, the corresponding valve diameter of two payzones in adjustment integrated form layering distribution measuring cell 9 is calculated according to deliverability equation；
G, regulation valve：The valve that previous step is determined loads in integrated form layering distribution measuring cell 9, passes through steel wire operation car 3
Integrated form layering distribution measuring cell 9 puts into Y341 is integrated with production packer 6, drive a well operation.
Claims (1)
1. a kind of gas well integrated form layering distribution and pressure measurement technique, the technique are realized by following device：
The present apparatus is made up of control monitoring device and laminated distributor under well mining tubular column two parts, and control monitoring device is by ground control
Instrument（1）, steel wire controller（2）And steel wire operation car（3）Composition, wherein steel wire controller（2）With steel wire operation car（3）Pass through electricity
Cable and data wire connection；Laminated distributor under well mining tubular column is by oil pipe（4）, hanging packer（5）, Y341 integrated forms with production packer
（6）, Y341 balance packer（7）, ball seat（8）, integrated form layering distribution measuring cell（9）Composition；Wherein ball seat（8）Upper end with
Y341 balances packer（7）Lower contact is threadedly coupled, Y341 balance packers（7）Top connection and oil pipe（4）Threaded connection, oil pipe
（4）The other end is with Y341 integrated forms with production packer（6）Lower contact is threadedly coupled, and Y341 integrated forms are with production packer（6）Top
Connected pipes（4）, oil pipe（4）The other end and hanging packer（5）Lower contact is threadedly coupled, and Y341 is integrated with production packer（6）
Distribution measuring cell is layered built with integrated form（9）；It is characterized in that：It is logical that a kind of gas well integrated form, which is layered distribution and pressure measurement technique,
Following steps are crossed to realize：
A, laminated distributor under well mining tubular column is connected in the order described above first, wherein Y341 is integrated with production packer（6）Inside it is furnished with
Integrated form layering distribution measuring cell with dead mouthpiece（9）；
B, after pressing crack construction terminates, the laminated distributor under well mining tubular column that tripping in has been connected under kill-job state；
C, packer setting：After laminated distributor under well mining tubular column tripping in production capacity desired depth, oil pipe（4）20MPa is inside suppressed, repeatedly
Three times, voltage stabilizing 10min realizes hanging packer（5）, Y341 integrated forms with production packer（6）, Y341 balance packer（7）Three
Individual packer is set simultaneously；
D, tubing string and testing seal about packer：Ground is suppressed, and forms tri- pressure steps of 10-15-20MPa, and integrated form layering distribution is surveyed
Press instrument（9）Oil pipe is recorded respectively（4）Outside head of liquid and oil pipe（4）Inside sets the change of pressure, and oil jacket annular space is suppressed
5MPa, passes through steel wire controller（2）Control steel wire operation car（3）Pull integrated form layering distribution measuring cell out（9）, integrated form layering
Distribution measuring cell（9）With being connected ground controller（1）Connection playback layering distribution measuring cell（9）Interior data；If oil pipe（4）
Interior pressure curve is three pressure steps, contrast oil pressure and casing pressure value, and two values are unequal, you can judges that three packers are realized and sits
Envelope, otherwise not set；
E, measurement payzone pressure：Coiled tubing（4）Gaslift recovers gas well liquid loading ability, the gas testing end of job is treated, according to gas testing knot
Fruit determines correspondence control valve diameter, and the diameter valve is loaded into integrated form layering distribution measuring cell（9）It is interior, surveyed integrated with production
Press instrument（9）With steel wire operation car（3）It is attached, by integrated with production measuring cell（9）Input is integrated with production packer to Y341（6）
It is interior, opening well and making production 3 days or so, integrated form layering distribution measuring cell（9）Pressure sensor measures upper and lower two respectively before mouth, after mouth
Before layer mouth, static pressure is moved after mouth；
F, determine valve diameter：Pass through steel wire controller（2）Control steel wire operation car（3）Pull integrated form layering distribution measuring cell out
（9）, by integrated with production measuring cell（9）With ground controller（1）Connection, ground data playback obtains the mouth of two different payzones
Before, pressure curve after mouth, according to deliverability equation calculate adjustment integrated form layering distribution measuring cell（9）The corresponding gas of interior two payzones
Outspoken footpath；
G, regulation valve：The valve that previous step is determined loads integrated form layering distribution measuring cell（9）It is interior, pass through steel wire operation car
（3）Integrated form is layered distribution measuring cell（9）Put into Y341 integrated with production packer（6）Interior, drive a well operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710546263.6A CN107288571B (en) | 2017-07-06 | 2017-07-06 | Integrated layered gas distribution and pressure measurement process for gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710546263.6A CN107288571B (en) | 2017-07-06 | 2017-07-06 | Integrated layered gas distribution and pressure measurement process for gas well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107288571A true CN107288571A (en) | 2017-10-24 |
| CN107288571B CN107288571B (en) | 2020-08-11 |
Family
ID=60101027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710546263.6A Active CN107288571B (en) | 2017-07-06 | 2017-07-06 | Integrated layered gas distribution and pressure measurement process for gas well |
Country Status (1)
| Country | Link |
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| CN (1) | CN107288571B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469281A (en) * | 2019-08-08 | 2019-11-19 | 中国石油天然气股份有限公司 | A kind of hermetic seal completion method and its completion tubular column and methods for using them |
| CN113530503A (en) * | 2021-08-27 | 2021-10-22 | 吕远 | Survey, transfer, adopt layering oil recovery system of integration |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201218080Y (en) * | 2008-07-08 | 2009-04-08 | 中国石油天然气股份有限公司 | New process pipe column for gas well partial pressure test |
| WO2009154500A1 (en) * | 2008-06-19 | 2009-12-23 | Schlumberger Canada Limited | Method for optimizing reservoir production analysis |
| CN101769129A (en) * | 2009-12-31 | 2010-07-07 | 刘玉文 | Integral layering gas recovery technology tubular column and application method thereof |
| CN203808984U (en) * | 2013-10-30 | 2014-09-03 | 中国石油天然气股份有限公司 | Test tubular column of two-layer commingled production gas well dynamic reserves |
| CN105422061A (en) * | 2015-12-09 | 2016-03-23 | 中国石油天然气股份有限公司 | Intelligent testing, adjusting and monitoring process device for split injection well and testing, adjusting and monitoring method thereof |
| CN105888650A (en) * | 2016-04-15 | 2016-08-24 | 中国石油天然气股份有限公司 | Gas well storage type integrated layered production allocation pressure gauge |
-
2017
- 2017-07-06 CN CN201710546263.6A patent/CN107288571B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009154500A1 (en) * | 2008-06-19 | 2009-12-23 | Schlumberger Canada Limited | Method for optimizing reservoir production analysis |
| CN201218080Y (en) * | 2008-07-08 | 2009-04-08 | 中国石油天然气股份有限公司 | New process pipe column for gas well partial pressure test |
| CN101769129A (en) * | 2009-12-31 | 2010-07-07 | 刘玉文 | Integral layering gas recovery technology tubular column and application method thereof |
| CN203808984U (en) * | 2013-10-30 | 2014-09-03 | 中国石油天然气股份有限公司 | Test tubular column of two-layer commingled production gas well dynamic reserves |
| CN105422061A (en) * | 2015-12-09 | 2016-03-23 | 中国石油天然气股份有限公司 | Intelligent testing, adjusting and monitoring process device for split injection well and testing, adjusting and monitoring method thereof |
| CN105888650A (en) * | 2016-04-15 | 2016-08-24 | 中国石油天然气股份有限公司 | Gas well storage type integrated layered production allocation pressure gauge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469281A (en) * | 2019-08-08 | 2019-11-19 | 中国石油天然气股份有限公司 | A kind of hermetic seal completion method and its completion tubular column and methods for using them |
| CN113530503A (en) * | 2021-08-27 | 2021-10-22 | 吕远 | Survey, transfer, adopt layering oil recovery system of integration |
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| Publication number | Publication date |
|---|---|
| CN107288571B (en) | 2020-08-11 |
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