CN102146789A - Deep profile controlling method - Google Patents
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- CN102146789A CN102146789A CN2011100780527A CN201110078052A CN102146789A CN 102146789 A CN102146789 A CN 102146789A CN 2011100780527 A CN2011100780527 A CN 2011100780527A CN 201110078052 A CN201110078052 A CN 201110078052A CN 102146789 A CN102146789 A CN 102146789A
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Abstract
The invention discloses a deep profile controlling method. The method is characterized by comprising the steps of dividing multiple oil layers of the same oil field block of a continental oil layer into a plurality of layer series, wherein each layer series has a respective flooding well network, and all the flooding well networks do not interfere with each other; passing water wells of the other layer series are found out as plugging agent injection wells between oil-water wells in a well group to be controlled rather than injecting plugging agents into water wells to be controlled, wherein the layer series of the passing water wells are positioned above or below the layer series of the well group to be controlled; and the passing water wells of the other layer series for injecting the plugging agents are returned to place the plugging agents between oil-water wells of a target oil layer, therefore, a purpose of deep profile control is achieved. The deep profile controlling method disclosed by the invention has the advantages of broad popularization and application prospects and simpleness of field implementation; moreover, just by using the current conventional technology, the deep profile control purpose can be achieved with comparatively low cost.
Description
Technical field
The present invention relates to the method that oil reservoir improves recovery ratio, relate in particular to a kind of depth profile control method.
Background technology
Profile control technique is to inject blocking agent in water injection well, realization is to the shutoff of water stream channel, with contradiction in the plane of improving oil reservoir and interlayer, the layer, makes the intake profile of water injection well become balanced more, enlarge the water drive swept volume, thereby improve a technology of water drive development effectiveness.Desk research and mining site practice all show, implement the purpose that profile control can reach decreasing water cut and increasing oil in water injection well, are one of dominant technology of present water drive sandstone oil reservoir high water-cut development period water and oil control.The sandstone oil reservoir of long-term injecting water exploitation, particularly turn the sandstone oil reservoir of follow-up water drive exploitation through polymer, macropore and high infiltration band are generally grown, contradiction is more outstanding in interlayer, the layer, cause injecting water and do invalid circulation at oil reservoir, and adopt the profile control technique of conventional blocking agent, the effect of going up at the scene is variation year by year, influenced development effectiveness, especially outstanding in the oil reservoir of this phenomenon after having passed through many rounds profile control.Present domestic deep profile controlling Study on Technology field mainly concentrates on blocking agent research aspect, and main way is to develop the blocking agent with good migration ability, implements heavy dose of the injection by well, makes blocking agent enter the purpose that the oil reservoir deep reaches deep profile controlling.For example, the agent of cross-linked polymer solution deep profile controlling, deep adjusting water blocking agent of self-crosslinked shell acrylamide multipolymer, shift drive agent of self cross-linked polymer, residual polyalcohol utilizes agent, polymer microballoon etc. again behind the polymer flooding.At present, these deep profile controlling technical costs based on novel profile control agent are higher relatively, and the engineering time is longer.Usually, its shut-off capacity of blocking agent with good migration ability a little less than, and relatively poor its shut-off capacity of blocking agent of migration ability is stronger.Thereby novel profile control agent all is not suitable for macropore plugging and high infiltration band.The objective of the invention is to adopt profile control agent commonly used to go up the purpose that realizes deep profile controlling at the scene, be specially adapted to the macropore of water plugging and profile controlling sizable application and the saturating old liberated area of the middle and high infiltration oil reservoir that high infiltration band is grown.
Summary of the invention
The objective of the invention is at the problems referred to above, a kind of depth profile control method is proposed, adopt profile control agent commonly used to go up the purpose that realizes deep profile controlling at the scene, be specially adapted to the macropore of water plugging and profile controlling sizable application and the saturating old liberated area of the middle and high infiltration oil reservoir that high infiltration band is grown.
Technical scheme of the present invention is:
A kind of depth profile control method is characterized in that: described depth profile control method is that a plurality of oil reservoirs with the same oil field block of terrestrial facies oil reservoir are divided into several series of strata, and each series of strata has flooding pattern separately, and flooding pattern is not disturbed each other; Between the oil-water well in intending the profile control well group, find the well of passing by on one's way of other series of strata to inject well, rather than in intending the profile control well, inject blocking agent as blocking agent; The series of strata of this well of passing by on one's way be positioned on the series of strata of intending the profile control well group or under.
Usually, every cover straticulate exploration all has well location map, and the figure acceptance of the bid understands that the position and the well of well do not form flooding pattern.All wells of passing by on one's way in intending the profile control well group all are candidate wells that profile control is implemented well.
The described well of passing by on one's way is positioned on the line of intending the profile control oil-water well or near the line, the well of passing by on one's way is apart from water injection well 20m-150m.
When the series of strata of the described well of passing by on one's way are positioned on the series of strata of intending the profile control well group, pass by on one's way well between the oil-water well of intending the profile control well group; This water injection well of passing by on one's way is injected well as the profile control blocking agent, adopt to seal up to pour down tubing string, the following series of strata at the place of intending the profile control well group are injected blocking agent, after construction was finished, the water injection well of passing by on one's way playback returned in the former aboveground series of strata net.During the profile control construction, former well casing post must be proposed, be lowered to the profile control operating tool string, recovering after profile control is finished is exactly to propose operating tool string, and the former well casing post that proposes is originally gone back down again, returns to the preceding state of profile control.
When the series of strata of the described well of passing by on one's way are positioned under the series of strata of intending the profile control well group, pass by on one's way well between the oil-water well of intending the profile control well group; This water injection well of passing by on one's way is injected well as blocking agent, adopts envelope to make a bet and go up tubing string or adopt back-up sand protection series of strata down, the last series of strata at the place of intending the profile control well group are injected blocking agent, after construction is finished, the well of passing by on one's way playback, return to former under in the series of strata well pattern.When the profile control of series of strata is constructed under the employing back-up sand protection, former well casing post must be proposed, be lowered to the profile control operating tool string, by the sand washing operation sand of inserting be rushed out after profile control is finished, more former well casing post is lowered to, return to the preceding state of profile control.
Blocking agent adopts blocking agent commonly used and combination thereof to carry out slug, and the blocking agent type is polymer gel blocking agent and particle blocking agent, and wherein the particle blocking agent comprises three kinds of particle dispersion, particle induration and hydroexpanding bodies again.
The slug of described blocking agent combination comprises: low concentration polymer frozen glue blocking agent and hydroexpanding body compound system, high concentration polymer frozen glue blocking agent; Polymer gel blocking agent and hydroexpanding body compound system, particle induration; Polymer gel blocking agent and hydroexpanding body compound system, particle dispersion, particle induration; Particle dispersion, particle induration and particle dispersion, polymer gel blocking agent.
Blocking agent adopts relatively poor and the particle blocking agent that shut-off capacity is stronger of migration ability.
Blocking agent adopts the stronger novel deep profile controlling agent of migration ability to make blocking agent.
Beneficial effect of the present invention:
Between the oil-water well of the present invention in intending the profile control well group, find the well of passing by on one's way of other series of strata to inject well, rather than in intending the profile control well, inject blocking agent as blocking agent.
(1) adopt blocking agent commonly used to go up at the scene and realize deep profile controlling, the ability of particularly migrating is relatively poor and the strong particle blocking agent of shut-off capacity also can realize deep profile controlling;
(2) blocking agent is placed between the profit, promptly realizes the oil reservoir deep;
(3) field conduct is simple, adopt present routine techniques can reach the deep profile controlling purpose, and cost is cheap relatively.
Figure of description
Deep profile controlling is sealed up and is transferred signal down between Fig. 1 oil-water well
As shown in fig. 1, the 1-well series of strata of passing by on one's way; 2-intends profile control well group series of strata; 3-intends the well in the profile control well group; The 4-well of passing by on one's way; 5-intends the oil well in the profile control well group
Signal is gone up in the downward modulation of deep profile controlling envelope between Fig. 2 oil-water well
As shown in Figure 2,6-intends profile control well group series of strata; The 7-well series of strata of passing by on one's way; 8-intends the well in the profile control well group; The 9-well of passing by on one's way; 10-intends the oil well in the profile control well group
The specific embodiment
The terrestrial facies oil reservoir is the main oil reservoir of China, and it is one of its characteristics that a block has a plurality of series of strata.Waterflooding extraction is the main development scheme in China oil field.At the Oilfield developing initial stage, generally all adopt full well to close to annotate and close the mode of adopting and exploit an i.e. cover flooding pattern exploitation.Under this development scheme, the interlayer contradiction that produces from the intrinsic non-homogeneity of oil reservoir itself, interlayer interference just, promptly because the infiltration difference of oil reservoir, when full well commingled water injection, the stratum water absorption that permeability is high is bigger.Bigger to the exploitation influential effect.Along with development of technology, the separate zone production of segmentation series of strata is applied at the scene.Consider reservoir development, every interlayer, different series of strata geology characteristic, fluid properties, crude oil property, close at present adopt whether exist layer with layer between problem such as influence each other, a plurality of oil reservoirs of same block are divided into several series of strata, and the flooding pattern that each series of strata has is not separately disturbed each other, reduces the influence of interlayer contradiction to exploitation with this.In segmentation series of strata development process, in order to improve new well pattern, except utilizing original old well, it is more newly to bore oil-water well.Particularly in latter period of oilfield development, well pattern is adjusted as one of effective way that improves development effectiveness, is used widely at the scene.This provides the foundation for realization of the present invention.
Depth profile control method of the present invention is characterized in that: described depth profile control method is that a plurality of oil reservoirs with the same oil field block of terrestrial facies oil reservoir are divided into several series of strata, and each series of strata has flooding pattern separately, and flooding pattern is not disturbed each other; Between the oil-water well in intending the profile control well group, find the well of passing by on one's way of other series of strata to inject well, rather than in intending the profile control well, inject blocking agent as blocking agent; The series of strata of this well of passing by on one's way be positioned on the series of strata of intending the profile control well group or under.
Usually, every cover straticulate exploration all has well location map, and the figure acceptance of the bid understands that the position and the well of well do not form flooding pattern.All wells of passing by on one's way in intending the profile control well group all are candidate wells that profile control is implemented well.
The described well of passing by on one's way is positioned on the line of intending the profile control oil-water well or near the line, the well of passing by on one's way is apart from water injection well 20m-150m.
When the series of strata of the described well of passing by on one's way are positioned on the series of strata of intending the profile control well group, pass by on one's way well between the oil-water well of intending the profile control well group; This water injection well of passing by on one's way is injected well as the profile control blocking agent, adopt to seal up to pour down tubing string, the following series of strata at the place of intending the profile control well group are injected blocking agent, after construction was finished, the water injection well of passing by on one's way playback returned in the former aboveground series of strata net.During the profile control construction, former well casing post must be proposed, be lowered to the profile control operating tool string, recovering after profile control is finished is exactly to propose operating tool string, and the former well casing post that proposes is originally gone back down again, returns to the preceding state of profile control.
When the series of strata of the described well of passing by on one's way are positioned under the series of strata of intending the profile control well group, pass by on one's way well between the oil-water well of intending the profile control well group; This water injection well of passing by on one's way is injected well as blocking agent, adopts envelope to make a bet and go up tubing string or adopt back-up sand protection series of strata down, the last series of strata at the place of intending the profile control well group are injected blocking agent, after construction is finished, the well of passing by on one's way playback, return to former under in the series of strata well pattern.When the profile control of series of strata is constructed under the employing back-up sand protection, former well casing post must be proposed, be lowered to the profile control operating tool string, by the sand washing operation sand of inserting be rushed out after profile control is finished, more former well casing post is lowered to, return to the preceding state of profile control.
Blocking agent adopts blocking agent commonly used and combination thereof to carry out slug, and the blocking agent type is polymer gel blocking agent and particle blocking agent, and wherein the particle blocking agent comprises three kinds of particle dispersion, particle induration and hydroexpanding bodies again.
The slug of described blocking agent combination comprises: low concentration polymer frozen glue blocking agent and hydroexpanding body compound system, high concentration polymer frozen glue blocking agent; Polymer gel blocking agent and hydroexpanding body compound system, particle induration; Polymer gel blocking agent and hydroexpanding body compound system, particle dispersion, particle induration; Particle dispersion, particle induration and particle dispersion, polymer gel blocking agent.
Blocking agent adopts relatively poor and the particle blocking agent that shut-off capacity is stronger of migration ability.
Blocking agent adopts the stronger novel deep profile controlling agent of migration ability to make blocking agent.
Claims (8)
1. depth profile control method is characterized in that: described depth profile control method is that a plurality of oil reservoirs with the same oil field block of terrestrial facies oil reservoir are divided into several series of strata, and each series of strata has flooding pattern separately, and flooding pattern is not disturbed each other; Between the oil-water well in intending the profile control well group, find the well of passing by on one's way of other series of strata to inject well, rather than in intending the profile control well, inject blocking agent as blocking agent; The series of strata of this well of passing by on one's way be positioned on the series of strata of intending the profile control well group or under.
2. depth profile control method as claimed in claim 1 is characterized in that: the described well of passing by on one's way is positioned on the line of intending the profile control oil-water well, and distance is intended profile control water injection well 20m-150m.
3. depth profile control method as claimed in claim 1 is characterized in that: the described well of passing by on one's way is positioned to be intended near the profile control oil-water well line, and distance is intended profile control water injection well 20m-150m.
4. depth profile control method as claimed in claim 1 is characterized in that: when the series of strata of the described well of passing by on one's way are positioned on the series of strata of intending the profile control well group, pass by on one's way well between the oil-water well of intending the profile control well group; This water injection well of passing by on one's way is injected well as the profile control blocking agent, adopt to seal up to pour down tubing string, the following series of strata at the place of intending the profile control well group are injected blocking agent, after construction was finished, the water injection well of passing by on one's way playback returned in the former aboveground series of strata net.
5. depth profile control method as claimed in claim 1 is characterized in that: when the series of strata of the described well of passing by on one's way are positioned under the series of strata of intending the profile control well group, pass by on one's way well between the oil-water well of intending the profile control well group; This water injection well of passing by on one's way is injected well as blocking agent, adopts envelope to make a bet and go up tubing string or adopt back-up sand protection series of strata down, the last series of strata at the place of intending the profile control well group are injected blocking agent, after construction is finished, the well of passing by on one's way playback, return to former under in the series of strata well pattern.
6. as the described depth profile control method of one of claim 1 to 5, it is characterized in that: blocking agent adopts blocking agent commonly used and combination thereof to carry out slug, blocking agent type commonly used is polymer gel blocking agent and particle blocking agent, and wherein the particle blocking agent comprises three kinds of particle dispersion, particle induration and hydroexpanding bodies again;
The slug type of described blocking agent combination comprises: low concentration polymer frozen glue blocking agent and hydroexpanding body compound system, high concentration polymer frozen glue blocking agent; Polymer gel blocking agent and hydroexpanding body compound system, particle induration; Polymer gel blocking agent and hydroexpanding body compound system, particle dispersion, particle induration; Particle dispersion, particle induration and particle dispersion, polymer gel blocking agent.
7. as the described depth profile control method of one of claim 1 to 5, it is characterized in that: blocking agent adopts relatively poor and the particle blocking agent that shut-off capacity is stronger of migration ability.
8. as the described depth profile control method of one of claim 1 to 5, it is characterized in that: blocking agent adopts the stronger polymer microballoon moldeed depth portion profile control agent of migration ability to make blocking agent.
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| CN201110078052.7A CN102146789B (en) | 2011-03-30 | 2011-03-30 | Deep profile controlling method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103628848A (en) * | 2013-12-02 | 2014-03-12 | 中国地质大学（武汉） | Multidirectional interlayer water flooding displacement oil extraction method and system |
| CN105971550A (en) * | 2016-06-27 | 2016-09-28 | 烟台智本知识产权运营管理有限公司 | Profile control method for medium-and-high-permeability reservoir |
| CN106089168A (en) * | 2016-06-27 | 2016-11-09 | 烟台智本知识产权运营管理有限公司 | A kind of method of medium to high permeable oil reservoir integral profile control |
| CN106988715A (en) * | 2017-04-14 | 2017-07-28 | 陕西和尊能源科技有限公司 | A kind of many slug profile control methods of water injection well |
| CN108019192A (en) * | 2016-11-01 | 2018-05-11 | 中国石油化工股份有限公司 | A kind of hydroexpanding body blocking agent profile control blocks removal of bridge formation method |
| CN109763800A (en) * | 2019-03-18 | 2019-05-17 | 哈尔滨理工大学 | A kind of separated-zone water infection oil field amount prediction technique |
| CN113969768A (en) * | 2020-07-23 | 2022-01-25 | 中国石油化工股份有限公司 | Directional enabling-differential releasing type volume water drive method for one-injection multi-production well group |
| CN113980664A (en) * | 2021-11-23 | 2022-01-28 | 中国石油化工股份有限公司 | Profile control agent and method suitable for layered polymer injection well |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628848A (en) * | 2013-12-02 | 2014-03-12 | 中国地质大学（武汉） | Multidirectional interlayer water flooding displacement oil extraction method and system |
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| CN106089168A (en) * | 2016-06-27 | 2016-11-09 | 烟台智本知识产权运营管理有限公司 | A kind of method of medium to high permeable oil reservoir integral profile control |
| CN108019192A (en) * | 2016-11-01 | 2018-05-11 | 中国石油化工股份有限公司 | A kind of hydroexpanding body blocking agent profile control blocks removal of bridge formation method |
| CN108019192B (en) * | 2016-11-01 | 2019-11-08 | 中国石油化工股份有限公司 | A kind of hydroexpanding body blocking agent profile control blocking removal of bridge formation method |
| CN106988715A (en) * | 2017-04-14 | 2017-07-28 | 陕西和尊能源科技有限公司 | A kind of many slug profile control methods of water injection well |
| CN109763800A (en) * | 2019-03-18 | 2019-05-17 | 哈尔滨理工大学 | A kind of separated-zone water infection oil field amount prediction technique |
| CN113969768A (en) * | 2020-07-23 | 2022-01-25 | 中国石油化工股份有限公司 | Directional enabling-differential releasing type volume water drive method for one-injection multi-production well group |
| CN113980664A (en) * | 2021-11-23 | 2022-01-28 | 中国石油化工股份有限公司 | Profile control agent and method suitable for layered polymer injection well |
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Inventor after: Wang Lushan Inventor after: Cui Wenfu Inventor after: Zhang Guangyan Inventor after: Lv Xihui Inventor after: Nie Binglin Inventor after: Hao Jinke Inventor after: Wang Haiying Inventor after: Liu Chengjie Inventor after: Jin Yanxin Inventor after: Xiong Zhaohong Inventor after: Li Jiyong Inventor after: Guan Yue Inventor after: Chen Yuli Inventor after: Fu Chen Inventor after: Yin Xiangwen Inventor before: Wang Lushan Inventor before: Yin Xiangwen Inventor before: Zhang Guangyan Inventor before: Liu Chengjie Inventor before: Jin Yanxin Inventor before: Lv Xihui Inventor before: Guan Yue Inventor before: Chen Yuli Inventor before: Fu Chen Inventor before: Wang Haiying |
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