CN1884346A - Preparation method of fiber composite gelatin for plugging oil coat macropore - Google Patents
Preparation method of fiber composite gelatin for plugging oil coat macropore Download PDFInfo
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- CN1884346A CN1884346A CN 200510077247 CN200510077247A CN1884346A CN 1884346 A CN1884346 A CN 1884346A CN 200510077247 CN200510077247 CN 200510077247 CN 200510077247 A CN200510077247 A CN 200510077247A CN 1884346 A CN1884346 A CN 1884346A
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Abstract
The invention discloses a method for preparing fiber complex gel used for plugging oil layer large opening, which is formed because of long time water injection and for controlling ineffective cycle of injected water and improving water-drive development effect; the preparation method for fiber complex gel comprises following steps: (1) adding 0.05-1 unit fiber into water of 100 units, stirring evenly to make fiber float on water; (2) adding 0.05-1 unit of water block off agent, stirring for 10 minutes to prepare fiber jellied liquid; (3) heating said liquid until it becomes gelatineous, and preparing fiber complex gel. The addition of fiber into formulation to prepare fiber complex gel after injection into large opening, which greatly increases plugging strength and flushing-endurance of block off agent in large opening and makes subsequent injected water flow to position with low penetration factor of oil layer, enlarges contact volume and drives out more oil.
Description
Technical field
The present invention relates to the water plugging and profiling technology of oilfield development process, be used for shutoff, improve the water drive development effectiveness, particularly be used for the fiber composite gel of reservoir plugging macropore because the oil reservoir macropore that the long-term injecting water exploitation forms is controlled and injected the invalid circulation of water.
Background technology
Since nonmarine deposit, the original serious heterogeneity of China's oil reservoir.Water drive exploitation even injection through decades are adopted by force, and the heterogeneous body situation of oil reservoir further worsens.Oil reservoir experiences long-term current scour, clay swelling in addition, fine migration even shake out, and some position of oil reservoir forms macropore or crack gradually, causes injecting the invalid circulation of water, and water drive " short circuit " has a strong impact on the oil-field development effect.The oil field comprehensive water cut such as for example grand celebration of oil field of the east main force, triumph, the Liaohe River, huge port, North China that accounts for crude oil in China output 80% at present is near 90%, main force's block moisture have up to 95%, it is very urgent further to improve the water drive development effectiveness.
In order to improve the water drive development effectiveness, a large amount of research and practice have been carried out.For example aspect reservoir engineering, having carried out reservoir description, changed series of strata, well pattern adjustment, well pattern thickening, unstable water injection, cyclic waterflooding etc., all is in order to enlarge macroscopical swept volume, to improve the water drive development effectiveness; Aspect engineering, zonal injection, water blockoff (machinery card envelope, chemical water plugging) profile control etc. have been developed.Especially chemical water plugging profile control has developed the blocking agent of multiple formulations, in decades as strong gel, weak gel etc.For example document one " polypropylene acrylamide gel water blockoff envelope is scurried technology in the stratum " (Vol.24 No.3 " petroleum prospecting and exploitation " in June, 1997) is described, acrylamide with 6% and 0.5% methene base bisacrylamide, crosslinked with the ammonium persulphate initiated polymerization, can form very strong gel, macropore is had plugging effect preferably.Document two " the sewage prepared polymer cross-linking system is in the Jiangsu oilfield application " (" petroleum prospecting and exploitation " Vol.28 No.4 in August calendar year 2001) employing polyacrylamide is that host, phenol-hexamethylenetetramine are the prescription of linking agent for another example, can form weak gel, be beneficial to and inject the stratum than the position, deep.
Though document one described strong gel becomes glue reliable, intensity is big, and gelation time is short, blocking agent cost height.Because the acrylamide monomer consumption more than 5%, so cost is 20-50 times of the crosslinked blocking agent of general polyacrylamide, is difficult to widespread use.
Document two is described to be the polyacrylamide cross linked gel, intensity a little less than, the concentration of host polyacrylamide is generally 0.1-0.2%, so cost is lower, the oil field is widely used in the water plugging and profile controlling of the saturating layer of middle and high infiltration, but the problem that exists is to stop up insufficient strength in macropore, and washed away easily, construction effect is poor.
Prior art can not satisfy the requirement of oil field macropore plugging.Though strong gel becomes glue reliable, intensity is big, and gelation time is short, blocking agent cost height, be the crosslinked blocking agent of general polyacrylamide 20-50 doubly, be difficult to widespread use.The polyacrylamide cross linked gel though cost is lower, stops up insufficient strength in macropore, washed away easily, and validity period is short.
The present invention is directed to the deficiency that prior art exists, in polyacrylamide cross linked gel blocking agent prescription, add fiber, form the fiber composite gel after injecting macropore, improved plugging strength and the anti-scouring capability of blocking agent in the macropore of stratum greatly, force follow-up injection water to turn to oil reservoir than the low permeability position, enlarge swept volume, displace more crude oil.
Summary of the invention
The objective of the invention is to prepare the fiberoptic fiber plural gel, on existing blocking agent prescription basis, add suitable filamentary material.
(1) plugging agent formulation selection
Most of existing plugging agent prescription can add fiber and carry out compound.Consider the possibility of on-the-spot widespread adoption, the main crosslinked class blocking agent of selective polymer is that host, phenol-hexamethylenetetramine are that the prescription of linking agent or prescription that organic chromium is linking agent add fiber composite as polyacrylamide.
(2) selection of fiber
In general, any fiber may be used to the object of the invention.But consider requirements such as proportion, wetting ability, environmental protection, its minimum diameter of the fiber of selection will reach about 1-10 micron (1/100-1/1000mm), surperficial strong hydrophilicity, proportion 1.0, unreactiveness, environmental sound, at least 1500 ℃ of heatproofs, staple length are 5mm～10mm.
Through screening, think that the SF fiber is comparatively suitable.The SF fiber is a kind of purity 100% sub-thread polypropylene filaments, can buy on the market.
(3) compound method of fiber composite gel
A) add 0.05～1 part of fiber in 100 parts of water, stir, fiber evenly is suspended in the tap water.Fiber working concentration scope is determined according to the requirement to intensity, is generally 0.2%.
B) add 0.05～1 part of plugging agent in the above-mentioned solution, stirred 10 minutes, make its uniform dissolution, form fiber and become glue.Plugging agent working concentration scope is determined according to the requirement to intensity.
C) the above-mentioned solution of heating forms the fiber composite gel to gluey behind the one-tenth glue.
Described plugging agent is a crosslinked polymer class plugging agent.The prescription of described crosslinked polymer class plugging agent is a polyacrylamide for polymkeric substance, and linking agent is the plugging agent of phenol-hexamethylenetetramine or organic chromium.Wherein the polyacrylamide working concentration is generally 0.2%, and linking agent phenol and hexamethylenetetramine generally all are 0.1%.Described fiber is that surperficial strong hydrophilicity, unreactiveness, 100～150 ℃ of heatproofs, length are that 5～10mm, minimum diameter can reach 1 micron fiber.Described fiber is that purity is 100% sub-thread polypropylene filaments.
Effect of the present invention can embody from following 3 aspects:
(1) compare with ordinary gel, the fiber composite gel-strength improves 1-2 level (adopting range estimation tongue regular way to measure).
(2) test in the core barrel of simulation macropore, the resistance to flow and the anti-scouring capability to water of fiber composite gel increase substantially.
(3) compare with ordinary gel, fiber composite gel cost increases less than 1%.
Description of drawings
Fig. 1 schematic flow sheet
Fig. 2 flow and displacement pressure figure
Embodiment
Below in conjunction with embodiment the present invention is further described, the cited case does not limit protection domain of the present invention.
Embodiment 1
(1) fiber composite becomes the preparation of glue
1) adds 0.2 part of SF fiber in 100 parts of water, stir a little, it evenly is suspended in the tap water.
2) add 0.4 part plugging agent in the above-mentioned solution, wherein the particulate state polyacrylamide is 0.2 part, 0.1 part of phenol, and 0.1 part of hexamethylenetetramine stirred 10 minutes, made it even, and the formation conjugated fibre becomes glue.
(2) simulation macropore and experiment process
Wash away the macropore of formation in order to simulate oil reservoir because of long-term injecting water, 5-10 order quartz sand be filled to diameter 40mm, length is in the core barrel of 300mm.Core flow test flow process is seen Fig. 1.
(3) experimental procedure
1) fiber is become glue become the glue simulation macropore of same particle size quartz sand that injected two fillings respectively with common.
2) two core barrels are sealed at both ends, put into 600 ℃ of thermostat containers 24 hours, make it become glue.
3) core barrel is taken out, remove the end face gel blocking, receive on the experiment process shown in Figure 1, inject tap water and make displacement test, record breakthrough pressure and anti-scouring capability.
(4) experimental result
Experimental result is seen Fig. 2.As seen compare with ordinary gel, about the fiber composite gel is doubled to the resistance to flow of current, and anti-scouring capability obviously improves (curve does not descend).
Embodiment 2
(1) fiber composite becomes the preparation of glue
1) adds 1 part of SF fiber in 100 parts of water, stir a little, it evenly is suspended in the tap water.
2) add 1 part plugging agent in the above-mentioned solution, wherein the particulate state polyacrylamide is 0.5 part, 0.25 part of phenol, and 0.25 part of hexamethylenetetramine stirred 10 minutes, made it even, and the formation conjugated fibre becomes glue.
(2) experimental result
Simulation macropore test-results display fibers plural gel obviously improves the resistance to flow and the anti-scouring capability thereof of current.
Embodiment 3
(1) fiber composite becomes the preparation of glue
1) adds 0.05 part of SF fiber in 100 parts of water, stir a little, it evenly is suspended in the tap water.
2) add 0.05 part plugging agent in the above-mentioned solution, wherein the particulate state polyacrylamide is 0.25 part, 0.125 part of phenol, and 0.125 part of hexamethylenetetramine stirred 10 minutes, made it even, and the formation conjugated fibre becomes glue.
(2) experimental result
Simulation macropore test-results display fibers plural gel obviously improves the resistance to flow and the anti-scouring capability thereof of current.
Claims (5)
1. plant the preparation method of the fiber composite gel that is used for the reservoir plugging macropore, it is characterized in that described plural gel is made by following process:
D) add 0.05～1 part of fiber in 100 parts of water, stir, make fiber evenly be suspended in the tap water;
E) in above-mentioned solution, add 0.05～1 part of plugging agent again, stir and make its uniform dissolution, form conjugated fibre and become glue;
F) the heating conjugated fibre becomes glue or becomes glue to inject the rock stratum conjugated fibre, forms the fiber composite gel behind the one-tenth glue.
2. according to the described a kind of preparation method who is used for the fiber composite gel of reservoir plugging macropore of claim 1, it is characterized in that described plugging agent is a crosslinked polymer class plugging agent.
3. according to the described a kind of preparation method who is used for the fiber composite gel of reservoir plugging macropore of claim 2, the prescription that it is characterized in that described crosslinked polymer class plugging agent is a polyacrylamide for polymkeric substance, and linking agent is the plugging agent of phenol-hexamethylenetetramine or organic chromium.
4. according to the described a kind of preparation method who is used for the fiber composite gel of reservoir plugging macropore of claim 1, it is characterized in that described fiber is that surperficial strong hydrophilicity, unreactiveness, 100～150 ℃ of heatproofs, length are the fiber of 1～10 micron of 5～10mm, diameter.
5. according to the described a kind of preparation method who is used for the fiber composite gel of reservoir plugging macropore of claim 4, it is characterized in that described fiber is that purity is 100% sub-thread polypropylene filaments.
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| CN 200510077247 CN1884346A (en) | 2005-06-20 | 2005-06-20 | Preparation method of fiber composite gelatin for plugging oil coat macropore |
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| CN 200510077247 CN1884346A (en) | 2005-06-20 | 2005-06-20 | Preparation method of fiber composite gelatin for plugging oil coat macropore |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435317B (en) * | 2008-12-12 | 2012-05-23 | 中国石油集团川庆钻探工程有限公司 | Loss return drop-out cross linked gel plugging process |
| CN102477288A (en) * | 2010-11-22 | 2012-05-30 | 中国石油大学(北京) | Well drilling and completion fluid for oil-gas reservoir protection |
| CN103602324A (en) * | 2013-07-24 | 2014-02-26 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Isolation gel base liquid, isolation gel liquid and isolation gel, preparation method and applications of |
| CN103805153A (en) * | 2012-11-12 | 2014-05-21 | 中国石油天然气股份有限公司 | Nucleus-containing nutritional gel |
| CN104076124A (en) * | 2014-06-23 | 2014-10-01 | 中国石油大学(华东) | Low-frequency resonance wave assisted gel plugging performance evaluation testing device and method |
| CN104119849A (en) * | 2013-04-23 | 2014-10-29 | 中国石油化工股份有限公司 | Jelly-fiber composite plugging agent and preparation method thereof |
| CN104371683A (en) * | 2014-11-24 | 2015-02-25 | 天津大港油田滨港集团博弘石油化工有限公司 | Composite fiber plugging aid for oil extraction |
| CN104531115A (en) * | 2014-12-30 | 2015-04-22 | 中国石油天然气股份有限公司 | Temporary plugging agent for horizontal well water control, and preparation method and application thereof |
| CN105778874A (en) * | 2016-04-01 | 2016-07-20 | 中国石油天然气集团公司 | Downhole drilling crosslinked gel leak stopping agent and leak stopping method thereof |
| CN109796950A (en) * | 2019-02-20 | 2019-05-24 | 北京大学 | A kind of adaptively pinpoint blocks composite turning agent and its application |
| CN110088225A (en) * | 2016-12-20 | 2019-08-02 | 沙特阿拉伯石油公司 | For leaking the plugging material of control to middle leakage control |
| CN110551490A (en) * | 2018-05-31 | 2019-12-10 | 中国石油化工股份有限公司 | Composition for preparing underground cross-linked composite gel plugging material, preparation method thereof and gel |
| CN111574976A (en) * | 2020-06-28 | 2020-08-25 | 四川格瑞迪斯石油技术有限公司 | Enhanced leaking stoppage gel and preparation method thereof |
| CN113528104A (en) * | 2020-04-21 | 2021-10-22 | 中国石油化工股份有限公司 | Jelly liquid and application thereof as suspension partition board water shutoff agent |
| CN115466606A (en) * | 2022-10-13 | 2022-12-13 | 中国石油大学(北京) | Fiber gel profile control agent and preparation method and application thereof |
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2005
- 2005-06-20 CN CN 200510077247 patent/CN1884346A/en active Pending
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| CN101435317B (en) * | 2008-12-12 | 2012-05-23 | 中国石油集团川庆钻探工程有限公司 | Loss return drop-out cross linked gel plugging process |
| CN102477288A (en) * | 2010-11-22 | 2012-05-30 | 中国石油大学(北京) | Well drilling and completion fluid for oil-gas reservoir protection |
| CN102477288B (en) * | 2010-11-22 | 2016-02-24 | 中国石油大学(北京) | A kind of drill in fluid of oil and gas reservoir protection |
| CN103805153B (en) * | 2012-11-12 | 2016-06-08 | 中国石油天然气股份有限公司 | Containing core nutrition frozen glue |
| CN103805153A (en) * | 2012-11-12 | 2014-05-21 | 中国石油天然气股份有限公司 | Nucleus-containing nutritional gel |
| CN104119849A (en) * | 2013-04-23 | 2014-10-29 | 中国石油化工股份有限公司 | Jelly-fiber composite plugging agent and preparation method thereof |
| CN103602324A (en) * | 2013-07-24 | 2014-02-26 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Isolation gel base liquid, isolation gel liquid and isolation gel, preparation method and applications of |
| CN103602324B (en) * | 2013-07-24 | 2016-09-14 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Isolation gel base fluid, isolation gel liquid, isolation gel preparation method and application |
| CN104076124A (en) * | 2014-06-23 | 2014-10-01 | 中国石油大学(华东) | Low-frequency resonance wave assisted gel plugging performance evaluation testing device and method |
| CN104076124B (en) * | 2014-06-23 | 2016-04-20 | 中国石油大学(华东) | Low-frequency resonant ripple assists gel sealing characteristics evaluation experimental device and method |
| CN104371683A (en) * | 2014-11-24 | 2015-02-25 | 天津大港油田滨港集团博弘石油化工有限公司 | Composite fiber plugging aid for oil extraction |
| CN104531115A (en) * | 2014-12-30 | 2015-04-22 | 中国石油天然气股份有限公司 | Temporary plugging agent for horizontal well water control, and preparation method and application thereof |
| CN104531115B (en) * | 2014-12-30 | 2017-07-28 | 中国石油天然气股份有限公司 | A kind of horizontal well control water diverting agent, preparation method and applications |
| CN105778874A (en) * | 2016-04-01 | 2016-07-20 | 中国石油天然气集团公司 | Downhole drilling crosslinked gel leak stopping agent and leak stopping method thereof |
| CN110088225A (en) * | 2016-12-20 | 2019-08-02 | 沙特阿拉伯石油公司 | For leaking the plugging material of control to middle leakage control |
| CN110551490B (en) * | 2018-05-31 | 2021-12-14 | 中国石油化工股份有限公司 | Composition for preparing underground cross-linked composite gel plugging material, preparation method thereof and gel |
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| CN109796950A (en) * | 2019-02-20 | 2019-05-24 | 北京大学 | A kind of adaptively pinpoint blocks composite turning agent and its application |
| CN109796950B (en) * | 2019-02-20 | 2020-04-14 | 北京大学 | Self-adaptive fixed-point plugging composite diverting agent and application thereof |
| CN113528104A (en) * | 2020-04-21 | 2021-10-22 | 中国石油化工股份有限公司 | Jelly liquid and application thereof as suspension partition board water shutoff agent |
| CN113528104B (en) * | 2020-04-21 | 2022-12-16 | 中国石油化工股份有限公司 | Jelly liquid and application thereof as suspension partition board water shutoff agent |
| CN111574976A (en) * | 2020-06-28 | 2020-08-25 | 四川格瑞迪斯石油技术有限公司 | Enhanced leaking stoppage gel and preparation method thereof |
| CN115466606A (en) * | 2022-10-13 | 2022-12-13 | 中国石油大学(北京) | Fiber gel profile control agent and preparation method and application thereof |
| CN115466606B (en) * | 2022-10-13 | 2023-10-20 | 中国石油大学(北京) | Fiber gel plugging agent and preparation method and application thereof |
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