CN101139920A - Dibasic composite horizontal well bottom water plugging technique - Google Patents
Dibasic composite horizontal well bottom water plugging technique Download PDFInfo
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- CN101139920A CN101139920A CNA2007101576973A CN200710157697A CN101139920A CN 101139920 A CN101139920 A CN 101139920A CN A2007101576973 A CNA2007101576973 A CN A2007101576973A CN 200710157697 A CN200710157697 A CN 200710157697A CN 101139920 A CN101139920 A CN 101139920A
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Abstract
The invention relates to a water block operation method for horizontal wells, in particular to a binary composite technique method of sealing and water block for horizontal well downholes; the invention is characterized in that: dynamic and static data of wells under execution are analyzed before execution, in order to determine filler consumption into a binary system; then performing well killing with fresh water before filling forced hardening flue, mixing in certain proportion of polypropylene amide, resorcinol and urotropine, and nitrogen into the well through the oil pipe; forming a partition board with the filled nitrogen, and blocking off the water cone formed by bottom water layer in the horizontal well; the method can both improve utilization rate of medium and low permeation layers, and effectively control high permeation water content, in order to reach the target of improving collection rate of horizontal wells. The method in particular adapts to blocking for high-permeation water bearing layers in horizontal wells.
Description
Technical field:
The present invention relates to the water plugging of horizontal well operational method, especially dibasic composite horizontal well bottom water plugging technique.
Background technology:
Oil field development enters the middle and later periods, for keeping stratum energy, by constantly reaching displacement of reservoir oil purpose to the stratum water filling. because the non-homogeneity of oil field stratum, the water that injects preferentially enters the high permeability zone zone, so just occurs involving less than the area, even forms the region of bypassed oil, injecting water advances along high permeability zones, form that vertical individual layer is advanced by leaps and bounds and from laterally at the bottom of the limit water advance, thereby make the moisture rising of oil well, and speed up.In addition, in order to improve recovery ratio, the horizontal well production technology has appearred in recent years, this drilling technology can improve reservoir withdrawal, but the moisture rising phenomenon of horizontal direction oil reservoir can occur exploiting the time, particularly because of the difference of the rate of oozing, the mobility difference of the existence of bottom aquifer and stratum non-homogeneity and water and oil, put and can form new water stream channel at end water level after by water breakthrough, the seepage flow situation occurs, the formed water awl of this passage has increased permeability, can reduce pressure there again, thereby cause the oil well height moisture, even reach the closing well stage and have influence on the oil well ordinary production.For disclosing multiple method for blocking in the high moisture permeable formation prior art of shutoff, wherein close with the present invention have CN1116229A " powder shape water adsorption profile adjusting agent for water flooding well ", CN1511918A " new selective depth profile control agent ", CN1278546A " delayed cross-linking profile control agent " and a US2006/0189488A.Non-patent literature: application (286～289 page), oil drilling technology 29th volume 1st phase of benzenediol in the polymeric gel water-plugging technique cutd open seam bushing pipe water plugging of horizontal well (40～43 pages) during oilfield chemistry the 14th volume the 3rd; The development and the thinking (41～47 pages) of external 2003 the 8th phases of oilfield engineering net horizontal section water blockoff new technology (21～22 pages), petroleum science and technology forum 2004 first phase China's Water in Water Shutoff in Oil Field profile control technique, all disclose a kind of profile control agent prescription that comprises polyacrylamide, resorcinol, methenamine, but the report of dibasic composite horizontal well bottom water plugging technique is not all disclosed above-mentioned document.(seeing patent retrieval referral centre of the State Intellectual Property Office search report on September 18th, 2007).
Summary of the invention:
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, and provide a kind of monobasic de-plugging that utilizes in the system, the row of helping is used for handling the stratum, and can be in the stratum energy reserve, can come shutoff high permeability zone, control comprehensive water cut by another yuan formed dividing plate in the stratum again, thereby reach the purpose dibasic composite horizontal well bottom water plugging technique that improves recovery ratio.
Taked following technical scheme for realizing the task that the present invention proposes:
Before the construction:
1.1 at first construction well performance static data is analyzed, is determined oil reservoir in the horizontal hole, water awl and bottom aquifer position:
1.2, determine the treatment radius and the used injection rate of shutoff water awl again according to permeability, degree of porosity and the development degree of water awl reservoir;
During construction:
After with the clear water kill-job, in well, inject gel by oil pipe 1.3 high-pressure well mouth is installed again on service shaft, in the stratum, form dividing plate, shutoff water awl, discharge capacity is controlled at 10-25m
3, pressure is controlled under the formation fracture pressure, and amount of gel is at 600-1800
3As meet the pressure phenomenon that jumps, termination of pumping to continue again after 0.5 hour to inject;
1.4 toward the interior nitrogen injection of sleeve pipe, its injection pressure is controlled under the formation fracture pressure;
1.5 closing well is 4 days behind the nitrogen injection foam, carries out work production again.
Described shutoff water awl treatment radius 3-5 rice, described gel is a modified PIA-605 oil field gel commonly used;
Each component of described gel is formed, by weight the mark meter:
The set of dispense ratio
Polyacrylamide (degree of hydrolysis: molecular weight 20%: 1,500 ten thousand) 0.6-1.0
Resorcin (technical grade) 0.03-0.08
Methenamine (technical grade) 0.20-0.30
Need during preparation to form faint yellow strong gel under 40～130 ℃ of situations, viscosity is greater than 8 * 10
4MPaS, maximum anti-salinity 2 * 10
3MgL
-1
Be the field ground preparation,, and then add polyacrylamide and utilize cementing truck in the stratum, to inject earlier with clear water dissolving resorcin and methenamine; After above-mentioned gelinite injection finishes,, seal with nitrogen foam at last and can finish the shutoff construction again by well inner sleeve nitrogen injection.
Advantage of the present invention and good effect are:
Because the sealing agent consumption that the present invention uses can reach 600-1800m
3The shutoff distance is more than 5 meters, do not use nitrogen sealing agent consumption to have only 60-300 side than the monobasic system, the shutoff distance has only 1-3 rice to compare, blocking agent injection rate of the present invention and shutoff distance improve a lot, this method is sealed by nitrogen foam in addition, the water plugging effect that treatment radius is brought is more obvious, particularly with injecting the water awl that strong gel method comes bottom water plugging layer projection, can be enough to gel is inhaled in the stratum, layer is in same seepage water mean place between each thereby make, and the nitrogen that is injected can advance gel rubber system to far-reaching stratum, this has not only improved the sweep efficiency of water drive, and can make nitrogen form the high pressure air cavity again near nearly well is the stratum energy reserve; After sealing the gel injection, the high pressure nitrogen in the layer can improve less permeable layer oil recovery effect in the nearly well again, improves the recovery ratio purpose thereby reach.
Description of drawings:
Fig. 1 is preceding water awl oil reservoir distribution map in horizontal hole for the present invention constructs.
Fig. 2 is back water awl oil reservoir distribution map in horizontal hole for the present invention constructs.
The specific embodiment:
The present invention is provided by following examples, is illustrated below in conjunction with accompanying drawing:
Among the figure, by 1, oil reservoir, 2, horizontal hole, 3, the water awl, 4, bottom aquifer, 5, the elevated pressure nitrogen air cavity, 6, dividing plate, 7, gel forms.
Among Fig. 1, before the construction:
1.1 the oil reservoir 1 in the horizontal hole 2 at first definite stratum, water awl 3, bottom aquifer 4 positions;
1.2 determine to inject the used injection rate of binary system shutoff water awl treatment radius, and calculate: Q=p by following formula at need
1π R
2L/p
2γ
Q: gas injection rate, R: treatment radius, l: perforation horizontal section length, P1: injection pressure, P2: atmospheric pressure, γ: gas injection coefficient.
During construction:
1.3 high-pressure well mouth is installed on service shaft, after the clear water kill-job, in oil pipe, inject gel 7 again, in the stratum, form dividing plate 6, operational discharge capacity is controlled at 10-25m
3, pressure is controlled at the stratum and cracks under the pressure, and the blocking agent amount of gel is generally at 600-1800m
3, as the pressure state that jumps appears, need termination of pumping continue injection after 0.5 hour.
1.4 toward the interior nitrogen injection of sleeve pipe, its injection pressure is controlled under the formation fracture pressure;
1.5 the nitrogen injection foam seals, and then closing well 4 days, carries out work production again.
Embodiment 2
Shutoff water is bored 3 treatment radius 3-5 rice, and described gel is a modified PIA-605 oil field gel commonly used;
Embodiment 3
Each component of described gel is formed, by weight the mark meter:
The set of dispense ratio
Polyacrylamide (degree of hydrolysis: molecular weight 20%: 1,500 ten thousand) 0.6-1.0
Resorcin (technical grade) 0.03-0.08
Methenamine (technical grade) 0.20-0.30
Form faint yellow strong gel during preparation under 40～130 ℃ of situations, viscosity is greater than 8 * 10
4MPaS, maximum anti-salinity 2 * 10
3MgL
-1, consumption is at 600-1800m
3Sealing ratiod is greater than 80%;
Embodiment 4
During preparation, be the preparation of field ground jar,, and then add polyacrylamide and utilize cementing truck in the stratum, to inject earlier with clear water dissolving resorcin and methenamine; After gelinite injects and finishes,, seal with nitrogen foam at last and can finish the shutoff construction, make gel rubber system enter far-reaching reservoir and form dividing plate 6, shutoff water awl 3, just can improve water plugging effect (Fig. 2) again by well inner sleeve nitrogen injection.
Claims (4)
1. dibasic composite horizontal well bottom water plugging technique is characterized in that: before the construction:
1.1 at first determine the interior oil reservoir (1) of the horizontal hole (2) on stratum, water awl (3), bottom aquifer (4) position;
1.2 determine to inject the used injection rate of binary system shutoff water awl (3) treatment radius, and calculate: Q=p by following formula at need
1π R
2L/p
2γ
Q: gas injection rate, R: treatment radius, l: perforation horizontal section length, P1: injection pressure, P2: atmospheric pressure, γ: gas injection coefficient.
During construction:
1.3 high-pressure well mouth is installed on service shaft, after the clear water kill-job, in oil pipe, inject gel (7) again, in the stratum, form dividing plate (6), setting-out awl (3) operational discharge capacity is controlled at 10-25m
3, pressure is controlled at the stratum and cracks under the pressure, and gel (7) consumption is at 600-1800m
3, as pressure occurs and jump, need termination of pumping continue injection after 0.5 hour;
1.4 toward the interior nitrogen injection of sleeve pipe, its injection pressure is controlled under the formation fracture pressure;
1.5 the nitrogen injection foam seals, and then closing well 4 days, carries out work production again.
2. dibasic composite horizontal well bottom water plugging technique according to claim 1 is characterized in that: the treatment radius 3-5 rice of described shutoff water awl (3), described gel are modified PIA-605 oil field gel commonly used.
3. dibasic composite horizontal well bottom water plugging technique according to claim 1 is characterized in that: each component of described gel is formed, by weight the mark meter:
The set of dispense ratio
Polyacrylamide (degree of hydrolysis: molecular weight 20%: 1,500 ten thousand) 0.6-1.0
Resorcin (technical grade) 0.03-0.08
Methenamine (technical grade) 0.20-0.30.
4. dibasic composite horizontal well bottom water plugging technique according to claim 1 is characterized in that: need during preparation to form faint yellow strong gel under 40～130 ℃ of situations, viscosity is greater than 8 * 10
4MPaS, maximum anti-salinity 2 * 10
3MgL
-1
Be the field ground preparation,, and then add polyacrylamide and utilize cementing truck in the stratum, to inject earlier with clear water dissolving resorcin and methenamine.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101576973A CN101139920A (en) | 2007-10-26 | 2007-10-26 | Dibasic composite horizontal well bottom water plugging technique |
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| CNA2007101576973A CN101139920A (en) | 2007-10-26 | 2007-10-26 | Dibasic composite horizontal well bottom water plugging technique |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876241A (en) * | 2009-04-30 | 2010-11-03 | 中国石油天然气股份有限公司 | Method for improving water drive recovery ratio of positive rhythm thick oil layer |
| CN102807849A (en) * | 2012-04-06 | 2012-12-05 | 中国石油大学(华东) | Gel plugging agent for deep profile control of higher temperature oil reservoir and preparation method of gel plugging agent |
| CN103497748A (en) * | 2013-09-02 | 2014-01-08 | 中国石油天然气股份有限公司 | Channeling sealing agent utilizing formation residual polymer and channeling sealing method thereof |
| CN105201449A (en) * | 2015-10-14 | 2015-12-30 | 中国石油集团长城钻探工程有限公司 | Water plugging method for thickened oil thermal recovery horizontal well |
| CN105332672A (en) * | 2015-11-17 | 2016-02-17 | 中国石油集团长城钻探工程有限公司 | Multi-element composite water-control oil-enhancement method for extracting oil |
| CN108547591A (en) * | 2018-02-13 | 2018-09-18 | 中国石油天然气股份有限公司 | Water plugging method for screen pipe well completion thickened oil horizontal well |
| CN112253077A (en) * | 2020-09-02 | 2021-01-22 | 中海石油(中国)有限公司深圳分公司 | Vertical type blocking mining mode three-dimensional excavation and submerging method |
| CN113356827A (en) * | 2020-03-06 | 2021-09-07 | 中国石油化工股份有限公司 | Radial well system and oil well system for constructing artificial spacer |
| CN113404459A (en) * | 2021-07-13 | 2021-09-17 | 西南石油大学 | Selective water plugging method for bottom water gas reservoir high-water-content gas well |
| CN113464087A (en) * | 2021-07-29 | 2021-10-01 | 西南石油大学 | Selective water plugging method for bottom water reservoir high-water-cut oil well |
| CN115059430A (en) * | 2022-07-08 | 2022-09-16 | 中海石油(中国)有限公司 | Selective cone pressing water plugging method for bottom water reservoir oil well |
| CN116950623A (en) * | 2023-09-20 | 2023-10-27 | 华运隆腾机械制造有限公司 | Wireless communication layered water injection integrated water distributor based on self-power generation |
| CN117535038A (en) * | 2023-11-10 | 2024-02-09 | 中国石油大学(华东) | Wall surface adhesion type gel system with three-dimensional framework and preparation method thereof |
-
2007
- 2007-10-26 CN CNA2007101576973A patent/CN101139920A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876241A (en) * | 2009-04-30 | 2010-11-03 | 中国石油天然气股份有限公司 | Method for improving water drive recovery ratio of positive rhythm thick oil layer |
| CN101876241B (en) * | 2009-04-30 | 2013-11-06 | 中国石油天然气股份有限公司 | Method for improving water drive recovery ratio of positive rhythm thick oil layer |
| CN102807849A (en) * | 2012-04-06 | 2012-12-05 | 中国石油大学(华东) | Gel plugging agent for deep profile control of higher temperature oil reservoir and preparation method of gel plugging agent |
| CN102807849B (en) * | 2012-04-06 | 2014-02-19 | 中国石油大学(华东) | Gel plugging agent for deep profile control of higher temperature oil reservoir and preparation method of gel plugging agent |
| CN103497748A (en) * | 2013-09-02 | 2014-01-08 | 中国石油天然气股份有限公司 | Channeling sealing agent utilizing formation residual polymer and channeling sealing method thereof |
| CN103497748B (en) * | 2013-09-02 | 2015-12-02 | 中国石油天然气股份有限公司 | Channeling sealing agent utilizing formation residual polymer and channeling sealing method thereof |
| CN105201449A (en) * | 2015-10-14 | 2015-12-30 | 中国石油集团长城钻探工程有限公司 | Water plugging method for thickened oil thermal recovery horizontal well |
| CN105332672A (en) * | 2015-11-17 | 2016-02-17 | 中国石油集团长城钻探工程有限公司 | Multi-element composite water-control oil-enhancement method for extracting oil |
| CN108547591A (en) * | 2018-02-13 | 2018-09-18 | 中国石油天然气股份有限公司 | Water plugging method for screen pipe well completion thickened oil horizontal well |
| CN113356827A (en) * | 2020-03-06 | 2021-09-07 | 中国石油化工股份有限公司 | Radial well system and oil well system for constructing artificial spacer |
| CN112253077A (en) * | 2020-09-02 | 2021-01-22 | 中海石油(中国)有限公司深圳分公司 | Vertical type blocking mining mode three-dimensional excavation and submerging method |
| CN113404459A (en) * | 2021-07-13 | 2021-09-17 | 西南石油大学 | Selective water plugging method for bottom water gas reservoir high-water-content gas well |
| CN113404459B (en) * | 2021-07-13 | 2022-07-22 | 西南石油大学 | Selective water plugging method for bottom water gas reservoir high-water-content gas well |
| CN113464087A (en) * | 2021-07-29 | 2021-10-01 | 西南石油大学 | Selective water plugging method for bottom water reservoir high-water-cut oil well |
| CN113464087B (en) * | 2021-07-29 | 2022-12-06 | 西南石油大学 | Selective water plugging method for bottom water reservoir high-water-cut oil well |
| CN115059430A (en) * | 2022-07-08 | 2022-09-16 | 中海石油(中国)有限公司 | Selective cone pressing water plugging method for bottom water reservoir oil well |
| CN115059430B (en) * | 2022-07-08 | 2024-01-23 | 中海石油(中国)有限公司 | Selective cone pressing water plugging method for oil well of side bottom water reservoir |
| CN116950623A (en) * | 2023-09-20 | 2023-10-27 | 华运隆腾机械制造有限公司 | Wireless communication layered water injection integrated water distributor based on self-power generation |
| CN117535038A (en) * | 2023-11-10 | 2024-02-09 | 中国石油大学(华东) | Wall surface adhesion type gel system with three-dimensional framework and preparation method thereof |
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Open date: 20080312 |