CN102127400A - Plugging agent for drilling fluid and protecting low percolation reservoir - Google Patents
Plugging agent for drilling fluid and protecting low percolation reservoir Download PDFInfo
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- CN102127400A CN102127400A CN2010105600846A CN201010560084A CN102127400A CN 102127400 A CN102127400 A CN 102127400A CN 2010105600846 A CN2010105600846 A CN 2010105600846A CN 201010560084 A CN201010560084 A CN 201010560084A CN 102127400 A CN102127400 A CN 102127400A
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Abstract
The invention discloses a plugging agent for a drilling fluid and protecting a low percolation reservoir, comprising the following components of: 10-40 parts of acid-soluble fiber, 5-10 parts of oil-soluble resin, 30-60 parts of acid-soluble deformed particles, 5-10 parts of high-temperature resistant natural small molecule materials and 10-15 parts of calcium carbonate. The basic component of the plugging agent is the acid-soluble fiber which is swelled and soft, has good tenacity and can expand by adsorbing partial moisture, and the like in the drilling fluid to form a meshy structure so as to form plugging on a hole throat under the action of flowing pressure. In addition, other components in the plugging agent, such as the deformed particles, the natural small molecule materials and the calcium carbonate can combine with the fiber to play a rapid plugging role, and therefore, the plugging agent has low damage depth on the reservoir. The plugging agent can be matched with the radius of the hole throat of the low percolation reservoir according to the regulation on the radius of the hole throat of a low percolation core. A drilling fluid system using the plugging agent as the main plugging material has the dynamic core filtration rate not more than 0.1ml/10min at high temperature and high pressure.
Description
Technical field
The invention belongs to petroleum drilling fluid with blocking up material temporarily.
Background technology
In oilfield exploitation procedure, drilling fluid will enter into reservoir inevitably.For the oil-gas field development of low permeability reservoir, brought very big difficulty.For the big low permeability reservoir of drilling fluid filtrate infringement, it is inaccurate and production capacity is extremely low even do not have the phenomenon of production capacity to tend to occur the reserves assessment.
Analysis-by-synthesis because the resistance to flow of low permeability reservoir own is big and drilling fluid to low permeability reservoir cause damage, solid phase invades that the obstruction pore throat causes.
At above problem, common way is to reduce invasion depth by add plugging agent in drilling fluid; And conventional plugging agent mainly is at the middle and high infiltration rock core, and for the little characteristics of low permeability reservoir pore throat, conventional plugging agent size is difficult to be complementary with stratum pore throat size, substantially can not form good internal filter cake, improve shutoff by improving outer mud cake merely, so plugging effect is bad, causes the injury to low permeability reservoir.
At present also still not at the special storage guarantor type plugging agent of low permeability reservoir research.
Summary of the invention
At the problem that prior art exists, the object of the present invention is to provide a kind of specially at the low permeability reservoir shutoff is fast, the shutoff band is shallow, effective, easily the row of returning, sour molten rate height, drilling fluid with low cost, environmentally safe are used and protected the low permeability reservoir plugging agent.
The objective of the invention is such realization; a kind of drilling fluid is with protecting the low permeability reservoir plugging agent; component that contains and weight proportion are: 10～40 parts of molten fibers of theobromine; but 5～10 parts of oil-soluble resins; 30～60 parts of molten particle and distortion particle of theobromine; 5～10 parts of natural small molecule materials of high temperature resistance, 10～15 parts of lime carbonate.
Above-mentioned each component takes by weighing mixing by corresponding proportioning; the clear water that adds an amount of (10～20 parts) again; complex reaction is 30～60 minutes in 40～80 ℃ of mixing tanks of temperature, and oven dry, ball milling are screened to required order number, pack and make drilling fluid of the present invention with protecting low permeability reservoir plugging agent product then.
Compared with prior art, the present invention has following remarkable advantage:
1, fast at the low permeability reservoir shutoff, the shutoff band is shallow, plugging effect is good
The essentially consist component of plugging agent of the present invention is the theobromine soluble fiber, and its swelling of fiber, soft, good toughness can adsorb portion water in the drilling fluid and grade and open, and form reticulated structure, under the effect of flowing pressure, form shutoff rapidly at the pore throat place.And because other components among the present invention, as the mutability particle, the collaborative fiber of natural small molecules and lime carbonate plays the effect of quick blocking, to the injury depth as shallow of reservoir.The present invention can regulate according to low permeability cores pore throat radius, mates with low permeability reservoir pore throat radius.With the present invention is the dynamic rock core fluid loss rate≤0.1ml/10min of drilling fluid system High Temperature High Pressure of main plugging material.
2, easily the row of returning, the protection low permeability reservoir
Main ingredient fiber of the present invention, mutability particle etc. have determined the row of returning easy, be drilling fluid system low permeability cores permeability resume figure 〉=90% of main plugging agent with the present invention, and repetition rate reach 100%.
3, theobromine is molten
Drilling fluid of the present invention reaches more than 96% with the molten rate of protection low permeability reservoir plugging agent acid, can acidifying in acidizing treatment.
4, with low cost
Raw material sources of the present invention are extensive, draw materials conveniently, and are cheap.
5, environmentally safe, environmental protection
The present invention's chemistry pH value is neutral, and vegetable fibre can be degenerated, and the natural polymerization Biodegradable does not pollute the environment.
Embodiment
Below in conjunction with embodiment, the present invention is further described, but should think that the present invention is had any qualification by following specific examples.Components contents is represented with weight among each embodiment.
Embodiment one
Get 30 parts of molten fibers of theobromine; but 5 parts of oil-soluble resins; 40 parts of soluble acids particle and distortion particle; 10 parts of natural small molecule materials of high temperature resistance; 15 parts of lime carbonate; add 15 parts of water again, complex reaction is after 30 minutes in the mixing tank of 80 ℃ of temperature, and the drilling fluid of drying, pack and make a kind of concrete proportioning is with protecting the low permeability reservoir plugging agent.
The product that this technology forms is fit to 0.1～1 * 10-3 μ m
2Row is returned in the reservoir core shutoff:
In the present invention, the molten fiber of theobromine adopts kapok staple fibre and modified product thereof, but oil-soluble resin adopts the polyvinyl alcohol oil-soluble resin, and the soluble acids particle and distortion particle adopts the AMPS/AM/DMAM multipolymer, and the natural small molecule material of high temperature resistance adopts humic-acid kind material modified.
Embodiment two
Get 20 parts of molten fibers of theobromine; but 10 parts of oil-soluble resins; 50 parts of soluble acids particle and distortion particle; 5 parts of natural small molecule materials of high temperature resistance; 10 parts of lime carbonate; add 25 parts of water again, complex reaction is after 60 minutes in the mixing tank of 40 ℃ of temperature, and the drilling fluid of drying, pack and make a kind of concrete proportioning is with protecting the low permeability reservoir plugging agent.
Wherein, the material of each component employing is with embodiment 1.
The product that this technology forms is fit to 10～50 * 10-3 μ m
2Row is returned in the reservoir core shutoff:
Embodiment three
Get 10 parts of molten fibers of theobromine; but 10 parts of oil-soluble resins; 60 parts of soluble acids particle and distortion particle; 5 parts of natural small molecule materials of high temperature resistance; 10 parts of lime carbonate; add 20 parts of water again, complex reaction is after 40 minutes in the mixing tank of 60 ℃ of temperature, and the drilling fluid of drying, pack and make a kind of concrete proportioning is with protecting the low permeability reservoir plugging agent.
Wherein, the material of each component employing is with embodiment 1.
The product that this technology forms is fit to 1～10 * 10-3 μ m
2Row is returned in the reservoir core shutoff:
Claims (1)
1. a drilling fluid comprises that following component is: 10～40 parts of molten fibers of theobromine, but 5～10 parts of oil-soluble resins, 30～60 parts of molten particle and distortion particle of theobromine, 5～10 parts of natural small molecule materials of high temperature resistance, 10～15 parts of lime carbonate with protection low permeability reservoir plugging agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010560084.6A CN102127400B (en) | 2010-11-24 | 2010-11-24 | Plugging agent for drilling fluid and protecting low percolation reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010560084.6A CN102127400B (en) | 2010-11-24 | 2010-11-24 | Plugging agent for drilling fluid and protecting low percolation reservoir |
Publications (2)
| Publication Number | Publication Date |
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| CN102127400A true CN102127400A (en) | 2011-07-20 |
| CN102127400B CN102127400B (en) | 2014-08-20 |
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| CN201010560084.6A Active CN102127400B (en) | 2010-11-24 | 2010-11-24 | Plugging agent for drilling fluid and protecting low percolation reservoir |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103788936A (en) * | 2013-11-08 | 2014-05-14 | 东方宝麟科技发展(北京)有限公司 | High-strength temporary blocking agent for oil and gas wells and preparation method and application thereof |
| CN104277800A (en) * | 2014-07-28 | 2015-01-14 | 河北永达化工有限公司 | Ideal filling film-formation wall cementing agent for drilling fluids |
| CN104629695A (en) * | 2015-02-11 | 2015-05-20 | 中国石油大学(北京) | Reservoir protection agent composition, broad-spectrum-type drilling fluid and application of broad-spectrum-type drilling fluid |
| CN104650823A (en) * | 2015-02-11 | 2015-05-27 | 中国石油大学(北京) | Protective agent composition of hypertonic special-hypertonic reservoir, as well as drilling fluid and applications thereof |
| CN104946218A (en) * | 2015-06-09 | 2015-09-30 | 西南石油大学 | Water plugging technology for salt well |
| CN108865088A (en) * | 2018-07-04 | 2018-11-23 | 西南石油大学 | Diverting agent and preparation method thereof and with drilling fluid and its application in fracture-type reservoir plugging while drilling |
| CN109486475A (en) * | 2017-09-13 | 2019-03-19 | 北京中天富源石油化工技术有限公司 | A kind of high temperature plugging agent and preparation method thereof |
| CN110330953A (en) * | 2019-07-11 | 2019-10-15 | 中国石油集团渤海钻探工程有限公司 | A kind of deep-well drilling and completing fluids container horizon protective agent and preparation method |
| CN110846002A (en) * | 2019-11-13 | 2020-02-28 | 中国海洋石油集团有限公司 | Water-based drilling fluid and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103788936A (en) * | 2013-11-08 | 2014-05-14 | 东方宝麟科技发展(北京)有限公司 | High-strength temporary blocking agent for oil and gas wells and preparation method and application thereof |
| CN103788936B (en) * | 2013-11-08 | 2016-05-04 | 东方宝麟科技发展(北京)有限公司 | A kind of high strength Oil/gas Well diverting agent, preparation and application thereof |
| CN104277800A (en) * | 2014-07-28 | 2015-01-14 | 河北永达化工有限公司 | Ideal filling film-formation wall cementing agent for drilling fluids |
| US9279076B1 (en) | 2015-02-11 | 2016-03-08 | China University Of Petroleum (Beijing) | Reservoir protecting agent composition and broad-spectrum drilling liquid and use thereof |
| US9267068B1 (en) | 2015-02-11 | 2016-02-23 | China University Of Petroleum (Beijing) | Protecting agent composition for high/ultra-high permeability reservoirs and drilling fluid and use thereof |
| CN104650823A (en) * | 2015-02-11 | 2015-05-27 | 中国石油大学(北京) | Protective agent composition of hypertonic special-hypertonic reservoir, as well as drilling fluid and applications thereof |
| CN104629695A (en) * | 2015-02-11 | 2015-05-20 | 中国石油大学(北京) | Reservoir protection agent composition, broad-spectrum-type drilling fluid and application of broad-spectrum-type drilling fluid |
| CN104946218A (en) * | 2015-06-09 | 2015-09-30 | 西南石油大学 | Water plugging technology for salt well |
| CN109486475A (en) * | 2017-09-13 | 2019-03-19 | 北京中天富源石油化工技术有限公司 | A kind of high temperature plugging agent and preparation method thereof |
| CN108865088A (en) * | 2018-07-04 | 2018-11-23 | 西南石油大学 | Diverting agent and preparation method thereof and with drilling fluid and its application in fracture-type reservoir plugging while drilling |
| CN110330953A (en) * | 2019-07-11 | 2019-10-15 | 中国石油集团渤海钻探工程有限公司 | A kind of deep-well drilling and completing fluids container horizon protective agent and preparation method |
| CN110330953B (en) * | 2019-07-11 | 2021-10-08 | 中国石油集团渤海钻探工程有限公司 | Reservoir protection agent for drilling and completion fluid for deep well |
| CN110846002A (en) * | 2019-11-13 | 2020-02-28 | 中国海洋石油集团有限公司 | Water-based drilling fluid and preparation method thereof |
| CN110846002B (en) * | 2019-11-13 | 2022-04-08 | 中国海洋石油集团有限公司 | Water-based drilling fluid and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102127400B (en) | 2014-08-20 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |