CN103867188B - Decision method used for profile control of oil-field water injection well - Google Patents
Decision method used for profile control of oil-field water injection well Download PDFInfo
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- CN103867188B CN103867188B CN201410095473.4A CN201410095473A CN103867188B CN 103867188 B CN103867188 B CN 103867188B CN 201410095473 A CN201410095473 A CN 201410095473A CN 103867188 B CN103867188 B CN 103867188B
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Abstract
The invention discloses a decision method used for profile control of an oil-field water injection well. The technical scheme is that the decision method comprises the following steps: (1) firstly testing the vacuum value of the wellhead oil pressure of the water injection well under the injection allocation condition by adopting a vacuum meter when the wellhead oil pressure of the water injection well is a negative value during a testing process; then, suddenly shutting down the well, and recording changes of wellhead vacuum with time; (2) converting the tested vacuum into absolute pressure; then, drawing a wellhead falloff curve of the water injection well by adopting the absolute pressure as a Y-axis and the time as an X-axis, and then, performing calculation and application according to the PI (pressure index) decision method. According to the decision method disclosed by the invention, decision aiming at when the wellhead oil pressure of the water injection well is the negative value is the supplement and improvement of wellhead PI decision; the calculation is performed by converting the vacuum into the absolute pressure value during wellhead PI decision testing of the absolute pressure in comparison with the decision made by adopting gage pressure in general, and therefore, the decision problem generated when the water injection well is negative in pressure is solved.
Description
Technical field
The invention belongs to oil-gas field development field, specifically waterflooding oil field is carried out profile control solution formulation, enforcement and
A kind of decision-making technique of effect assessment.
Background technology
In oil-gas field development, profile control technique is to improve one of important means of oil recovery factor.Profile control technique is comprising certainly
Plan technology, blocking agent technology, injection technique and assessment technique.Wherein profile control decision-making hasRE、RS、PIEtc. several main decision-making skills
Art, it is most widely used to bePI（pressure index）Decision-making technic is well head pressure index decision-making technic, and it is with water filling
Well well head falloff curve is data base, withPIIt is worth the technology for block integral profile control decision parameters.PIValue is according to water injection well
Well head falloff curve is calculated by its definition.The oil pressure of general wellhead of water injection well is malleation, i.e., in the case that pressure is more than 0.1MPa,
Test decision is carried out using gauge pressure, but in the case that wellhead of water injection well oil pressure is negative pressure, cannot be direct by gauge pressure
Carry out decision-making, there is presently no for oil pressure be negative pressure when decision-making technique.
The content of the invention
The present invention is exactly on the basis of existing well head pressure index decision-making, there is provided a kind of to adjust for oil field negative pressure water injection well
The decision-making technique cutd open, it is relevant with profile control during solving the problems, such as water injection well oil pressure as negative pressure.
Technical scheme is comprised the following steps：
（1）When in test process, wellhead of water injection well oil pressure is negative value, initially with vacuum meter, test in the case of injection allocation
The vacuum degree of wellhead of water injection well oil pressure；Then unexpected closing well, records well head vacuum over time；
（2）The vacuum for measuring is transformed into into absolute pressure；Then absolute pressure is adopted for ordinate, with the time as horizontal stroke
Coordinate, draws the well head falloff curve of water injection well, then according toPIDecision-making technique is calculated and is applied.
The decision-making when present invention is negative pressure for wellhead of water injection well oil pressure, is the supplement to well head pressure index decision-making and complete
It is kind, and decision-making contrast is carried out using gauge pressure typically, the well head pressure index decision-making test of absolute pressure adopts vacuum, is transformed into
Absolute pressure value is calculated, and solves decision problem during water injection well negative pressure.
Description of the drawings
Fig. 1 is well head falloff curve before and after 418 well profile controls.
Specific embodiment
The Karazhanbas oil fields of the republic of Kazakhstan（Karazhan Bath oil field, abbreviation KBM) it is located at and breathes out state western part
The Buzachi peninsulas of the Caspian Sea east bank, are high hole, medium to high permeable heavy oil reservoir.Underground crude oil 240～340mpa.s of viscosity.Oil reservoir thing
Good, the permeability 800 × 10 of property-3μm2, porosity 30.7%；As steam injection development is up to more than 20 years, oil reservoir is destructurized, shows
Track agent is tested, and injection water channeling speed is up to 2000m/d unexpectedly（Conversion）.Underground is in debt big, and water injection well oil pressure is negative value, and 2013
In May in year, screen 5 mouthfuls（443、 420、 418、 417、367）Well carries out profile control, and before construction, present situation of water injection is shown in Table 1.
1 KBM oil fields profile control well water filling situation table of table
| Pound sign | Injection allocation m3 | Real note m3 | Water filling oil pressure MPa | Vacuum meter MPa |
| 417 wells | 50 | 34 | 0 | -0.004 |
| 418 wells | 40 | 35 | 0 | -0.002 |
| 420 wells | 40 | 96 | 0 | -0.048 |
| 443 wells | 50 | 47 | 0 | |
| 367 wells | 50 | 47 | 0 | -0.076 |
During shaft mouth test pressure drop, vacuum meter is loaded onto, then closing well test pressure changes over time.Such as 418 wells, in profile control
Front 2013.4.20 measures one group of well head vacuum degree, this value is added 0.1MPa then, the absolute pressure value of well head is obtained, is seen
Table 2.
Well head pressure fall-off test result table before 2 418 well profile control of table
| Time min | Well head vacuum MPa | Time min | Well head absolute pressure MPa |
| 0 | 0 | 0 | 0.1 |
| 1.5 | -0.002 | 1.5 | 0.098 |
| 2 | -0.004 | 2 | 0.096 |
| 3 | -0.006 | 3 | 0.094 |
| 4 | -0.008 | 4 | 0.092 |
| 5.5 | -0.01 | 5.5 | 0.09 |
| 7.5 | -0.012 | 7.5 | 0.088 |
| 10 | -0.014 | 10 | 0.086 |
| 14.5 | -0.016 | 14.5 | 0.084 |
| 24 | -0.018 | 24 | 0.082 |
| 35 | -0.019 | 35 | 0.081 |
| 45 | -0.019 | 45 | 0.081 |
| 55 | -0.019 | 55 | 0.081 |
| 60 | -0.019 | 60 | 0.081 |
| 70 | -0.019 | 70 | 0.081 |
| 80 | -0.019 | 80 | 0.081 |
| 90 | -0.019 | 90 | 0.081 |
The well carries out profile control construction in 2013.4.21-5.8, adds up the profile control solution 2000m such as injection frozen glue+reinforcing frozen glue3。
Shaft mouth test pressure drop after profile control, obtains pressure value and is converted into absolute pressure, is shown in Table 3 with the test result contrast before profile control.
Well head absolute pressure value before and after 3 418 well profile control of table
Result is obtained according to test, according toPIDecision-making technic, can evaluate profile control effect, see Fig. 1 and Biao 4.
Well head before and after 4 418 well profile control of tablePIDecision table
| Label | Pound sign | Date | Note water layer thickness | Day fluence | Water injection pressure | PI 90 | FD | q/h | PI90'1.00 |
| (m) | (m3·d-1) | (MPa) | (MPa) | (m3·d-1·m-1) | (MPa) | ||||
| Before tune | 418 wells | 2013.4.20 | 23 | 35 | 0.1 | 0.08 | 0.83 | 1.52 | 0.05 |
| After tune | 418 wells | 2013.5.17 | 23 | 34 | 1.78 | 1.7 | 0.96 | 1.48 | 1.15 |
Profile control effect can be evaluated by decision-making：
A), under injection allocation same case, oil pressure rises to 1.78MPa (absolute pressures by 0.1MPa）, after profile control, oil pressure rises
1.68MPa；
B) fromPIThe result of decision sees that well head pressure index improves 1.1Mpa after profile control, and degree of filling improves 0.13, falloff curve
Upper shifting.
C) 418 well groups correspondence, 6 mouthfuls of oil well, daily fluid production rate 227.0t before profile control, daily oil production 34t, comprehensive water cut 85%, adjust
After cuing open construction, well group peak-peak daily fluid production rate 237.0t, daily oil production 48t, comprehensive water cut 80%.Increase day by day oily 14t, comprehensively contains
5% is dropped under water.
Claims (1)
1. a kind of decision-making technique for oil field negative pressure Profile Control in Injection Well, it is characterised in that comprise the following steps：
（1）When wellhead of water injection well oil pressure is negative value in test process, initially with vacuum meter, the water filling in the case of injection allocation is tested
The vacuum degree of well well head oil pressure；Then unexpected closing well, records well head vacuum over time；
（2）The vacuum for measuring is transformed into into absolute pressure；Then absolute pressure is adopted for ordinate, with the time as abscissa,
The well head falloff curve of water injection well is drawn, then according toPIDecision-making technique is calculated and is applied.
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| CN105715238A (en) * | 2015-12-01 | 2016-06-29 | 山东石大油田技术服务股份有限公司 | Real time monitoring and controlling method for displacement pressure gradient of waterflooding development oil reservoir |
| CN106802435A (en) * | 2017-01-18 | 2017-06-06 | 华北科技学院 | The method of testing of two large categaries |
| CN106772681A (en) * | 2017-01-18 | 2017-05-31 | 华北科技学院 | The method of testing of caving zone and height of the water conductive fracture zone |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173581A (en) * | 1997-08-06 | 1998-02-18 | 石油大学(华东) | Pressure index deciding method for block integral profile control for water packing-off |
| CN1342829A (en) * | 2001-08-27 | 2002-04-03 | 石油大学(华东) | Edge water scheduling technique for oil field using edge water to displace oil |
| CN1560429A (en) * | 2004-02-25 | 2005-01-05 | 石油大学(华东) | Disision method of plugging water for integral regulating profile of water flood oil field |
| CN103075142A (en) * | 2013-01-14 | 2013-05-01 | 中国石油大学(华东) | Method for selecting water plugging oil well during development of oilfield through water injection |
| CN203463029U (en) * | 2013-09-03 | 2014-03-05 | 中国建筑第四工程局有限公司 | Well pipe structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8078328B2 (en) * | 2008-05-03 | 2011-12-13 | Saudi Arabian Oil Company | System, program product, and related methods for performing automated real-time reservoir pressure estimation enabling optimized injection and production strategies |
-
2014
- 2014-03-14 CN CN201410095473.4A patent/CN103867188B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173581A (en) * | 1997-08-06 | 1998-02-18 | 石油大学(华东) | Pressure index deciding method for block integral profile control for water packing-off |
| CN1342829A (en) * | 2001-08-27 | 2002-04-03 | 石油大学(华东) | Edge water scheduling technique for oil field using edge water to displace oil |
| CN1560429A (en) * | 2004-02-25 | 2005-01-05 | 石油大学(华东) | Disision method of plugging water for integral regulating profile of water flood oil field |
| CN103075142A (en) * | 2013-01-14 | 2013-05-01 | 中国石油大学(华东) | Method for selecting water plugging oil well during development of oilfield through water injection |
| CN203463029U (en) * | 2013-09-03 | 2014-03-05 | 中国建筑第四工程局有限公司 | Well pipe structure |
Non-Patent Citations (1)
| Title |
|---|
| 压力指数决策技术及其应用进展;赵福麟;《中国石油大学学报（自然科学版）》;20110228;82-86 * |
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