CN104059621A - Anti-collapse drilling fluid and preparation method thereof - Google Patents
Anti-collapse drilling fluid and preparation method thereof Download PDFInfo
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- CN104059621A CN104059621A CN201410270614.1A CN201410270614A CN104059621A CN 104059621 A CN104059621 A CN 104059621A CN 201410270614 A CN201410270614 A CN 201410270614A CN 104059621 A CN104059621 A CN 104059621A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/12—Clay-free compositions containing synthetic organic macromolecular compounds or their precursors
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Abstract
The invention relates to an anti-collapse drilling fluid which comprises the following components in percentage by mass: 0.6-0.8% of polyacrylamide, 0.3-0.5% of potassium polyacrylate, 4-6% of non-fluorescent lubricating anti-collapse agent, 0.3-0.5% of caustic soda, 0.3-0.5% of sodium carboxymethylcellulose, 0.3-0.5% of vinyl monomer multipolymer PAC-141 and 92-94% of water, wherein the sum of the mass percents of the components is 100%. The preparation method comprises the following steps: respectively weighing the raw materials according to the mass percents to ensure that the sum of the mass percents is 100%, and then uniformly mixing to obtain the anti-collapse drilling fluid. The anti-collapse drilling fluid effectively prevents collapse caused by wellbore instability in the delayed drilling process of a Zhiluo formation of a Zhidan region on an oilfield and after drilling finishing, and solves the wellbore collapse and instability problem in the drilling process, thereby achieving the purposes of ensuring the wellbore quality, increasing the drilling speed, protecting the reservoir, reducing economic loss and increasing oilfield benefits.
Description
Technical field
The invention belongs to drilling technique field, be specifically related to a kind of caving-preventing drilling fluid, the invention still further relates to the preparation method of this caving-preventing drilling fluid.
Background technology
Oil well well is because unsettled problem appears in the factors such as geologic agent, mud shale and mud interaction and drilling operation, be referred to as Wellbore Stability, Wellbore Stability is the very complicated global problem running in well system engineering, does not also work out so far a set of complete effective ways that can settle the matter once and for all.Therefore, people pay attention to the research of wellbore stability mechanism more, in the hope of obtaining new breakthrough at wellbore stability technical elements.At present aspect wellbore stability mechanism and technical study, there iing an important feature, be about to research work and combine with the improvement of environment protection, oil layer protection, drilling fluid over-all properties.Drilling fluid is one of key factor affecting wellbore stability; therefore; development research goes out the caving-preventing sloughing drilling fluid system of excellent property; solve the destabilization problems that collapses of the borehole wall in drilling process; keep wellbore stability; be the important technology that guarantees wellbore quality in oil gas drilling, improves drilling speed, simultaneously significant to reservoir protection.
Summary of the invention
The object of this invention is to provide a kind of caving-preventing drilling fluid, solved the problem that the borehole wall very easily collapses in drilling process.
Another object of the present invention is to provide a kind of preparation method of caving-preventing drilling fluid.
The technical solution adopted in the present invention is, a kind of caving-preventing drilling fluid, it is characterized in that, according to mass percent, by following raw material, formed: polyacrylamide 0.6%～0.8%, polyacrylic acid potassium 0.3%～0.5%, without fluorescence without fluorescence lubricating collapse-resisting agent 4%～6%, caustic soda 0.3%～0.5%, cellulose sodium carboxymethyl 0.3%～0.5%, vinyl monomer multiple copolymer PAC-1410.3%～0.5%, water 92%～94%, the mass percent sum of above-mentioned each component is 100%.
Another technical scheme of the present invention is, a kind of preparation method of caving-preventing drilling fluid specifically implements according to following steps:
Step 1, according to mass percent, take respectively following raw material: polyacrylamide 0.6%～0.8%, polyacrylic acid potassium 0.3%～0.5%, without fluorescence lubricating collapse-resisting agent 4%～6%, caustic soda 0.3%～0.5%, cellulose sodium carboxymethyl 0.3%～0.5%, vinyl monomer multiple copolymer PAC-141PAC-1410.3%～0.5%, water 92%～94%, the mass percent sum of above-mentioned each component is 100%;
Step 2, each raw material that described step 1 is taken evenly mixes, and obtains this caving-preventing drilling fluid.
The invention has the beneficial effects as follows; a kind of caving-preventing drilling fluid; effectively prevented in the straight sieve group drilling process of exploratory area, Yanchang Oilfield Zhidan and later the collapsing of causing because of hole instability of finishing drilling; solved the destabilization problems that collapses of the borehole wall in drilling process; keep wellbore stability, thereby reached the object that guarantees wellbore quality, raising drilling speed, protection reservoir, minimizing financial loss, improves oil field benefit.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
A kind of caving-preventing drilling fluid of the present invention, according to mass percent, by following raw material, formed: polyacrylamide 0.6%～0.8%, polyacrylic acid potassium 0.3%～0.5%, without fluorescence lubricating collapse-resisting agent 4%～6%, caustic soda 0.3%～0.5%, cellulose sodium carboxymethyl 0.3%～0.5%, vinyl monomer multiple copolymer PAC-1410.3%～0.5%, water 92%～94%, the mass percent sum of above-mentioned each component is 100%.
The preparation method of above-mentioned caving-preventing drilling fluid, specifically implements according to following steps:
Step 1, according to mass percent, take respectively following raw material: polyacrylamide 0.6%～0.8%, polyacrylic acid potassium 0.3%～0.5%, without fluorescence lubricating collapse-resisting agent 4%～6%, caustic soda 0.3%～0.5%, cellulose sodium carboxymethyl 0.3%～0.5%, vinyl monomer multiple copolymer PAC-1410.3%～0.5%, water 92%～94%, the mass percent sum of above-mentioned each component is 100%;
Step 2, each raw material that described step 1 is taken evenly mixes, and obtains this caving-preventing drilling fluid.
In the moiety of above-mentioned caving-preventing drilling fluid, the pH value that is mainly used in regulating drilling fluid of caustic soda; Polyacrylamide is a kind of polymeric flocculant, can make drilling cuttings and the coagulation of soil inferior in not disperseing in drilling fluid, so that using mechanical solid control equipment is removed, can solve preferably the dispersion of drilling cuttings in decentralized drilling fluid system and the problem accumulating in drilling fluid, to improve rate of penetration, reduce the many complexcase in drilling process, reduce drilling cost; Polyacrylic acid potassium is a kind of widely used borehole wall stabilizer.There is the mud shale of inhibition and drilling cuttings dissemination, have concurrently and fall dehydration, improve flow pattern and increase the performances such as lubricated.Can effectively suppress stratum pulping and can with multiple treatment agent compatibility.Can improve the rheological property of drilling fluid, coated drilling cuttings, suppresses stratum pulping effectively.The existence of potassium ion, can prevent the aquation of ooze shale and crisp rigid mud shale and peel off, and plays the effect of stabilizing borehole; Without fluorescence lubricating collapse-resisting agent, be that Puyang oilfield of Henan Xiang Yu Chemical Co., Ltd. manufactures, main rising reduced drilling fluid frictional coefficient, increases the effect of borehole wall stability; Xylo-Mucine, for water-base drilling fluid fluid loss agent, has certain viscosifying action, and protection oil well is as mud stability, water-holding agent; Vinyl monomer multiple copolymer PAC-141 is that Puyang oilfield of Henan Xiang Yu Chemical Co., Ltd. manufactures, it does tackifier in drilling well, have simultaneously and well fall leak-off effect, can change drilling fluid rheology performance, effectively coated drilling cuttings, suppress stratum pulping, have good inhibition Shale Hydration dispersive ability, stabilizing borehole, reduces hole diameter amplification degree, thereby raising drilling speed, the shortening cycle.
After above each component is mixed according to specified proportion; for the straight sieve group in exploratory area, Zhidan; effectively prevented in drilling process and after finishing drilling because collapsing of causing of hole instability; solved the destabilization problems that collapses of the borehole wall in drilling process; keep wellbore stability, thereby reached the object that guarantees wellbore quality, raising drilling speed, protection reservoir, minimizing financial loss, improves oil field benefit.
Embodiment 1
Step 1, according to mass percent, take respectively following raw material: polyacrylamide 0.6%, polyacrylic acid potassium 0.4, without fluorescence lubricating collapse-resisting agent 5%, caustic soda 0.3%, cellulose sodium carboxymethyl 0.4%, vinyl monomer multiple copolymer PAC-1410.5%, water 92.8%, the mass percent sum of above-mentioned each component is 100%;
Step 2, each raw material that described step 1 is taken evenly mixes, and obtains this caving-preventing drilling fluid.
Embodiment 2
Step 1, according to mass percent, take respectively following raw material: polyacrylamide 0.7%, polyacrylic acid potassium 0.5, without fluorescence lubricating collapse-resisting agent 4%, caustic soda 0.4%, cellulose sodium carboxymethyl 0.5%, vinyl monomer multiple copolymer PAC-1410.3%, water 93.6%, the mass percent sum of above-mentioned each component is 100%;
Step 2, each raw material that described step 1 is taken evenly mixes, and obtains this caving-preventing drilling fluid.
Embodiment 3
Step 1, according to mass percent, take respectively following raw material: polyacrylamide 0.8%, polyacrylic acid potassium 0.3, without fluorescence lubricating collapse-resisting agent 4.5%, caustic soda 0.5%, cellulose sodium carboxymethyl 0.3%, vinyl monomer multiple copolymer PAC-1410.4%, water 93.2%, the mass percent sum of above-mentioned each component is 100%;
Step 2, each raw material that described step 1 is taken evenly mixes, and obtains this caving-preventing drilling fluid.
Embodiment 4
Step 1, according to mass percent, take respectively following raw material: polyacrylamide 0.8%, polyacrylic acid potassium 0.3, without fluorescence lubricating collapse-resisting agent 4.4%, caustic soda 0.4%, cellulose sodium carboxymethyl 0.3%, vinyl monomer multiple copolymer PAC-1410.3%, water 93.5%, the mass percent sum of above-mentioned each component is 100%;
Step 2, each raw material that described step 1 is taken evenly mixes, and obtains this caving-preventing drilling fluid.
Embodiment 5
Step 1, according to mass percent, take respectively following raw material: polyacrylamide 0.6%, polyacrylic acid potassium 0.3, without fluorescence lubricating collapse-resisting agent 4%, caustic soda 0.3%, cellulose sodium carboxymethyl 0.5%, vinyl monomer multiple copolymer PAC-1410.3%, water 94%, the mass percent sum of above-mentioned each component is 100%;
Step 2, each raw material that described step 1 is taken evenly mixes, and obtains this caving-preventing drilling fluid.
Embodiment 6
Step 1, according to mass percent, take respectively following raw material: polyacrylamide 0.7%, polyacrylic acid potassium 0.3, without fluorescence lubricating collapse-resisting agent 6%, caustic soda 0.3%, cellulose sodium carboxymethyl 0.3%, vinyl monomer multiple copolymer PAC-1410.4%, water 92%, the mass percent sum of above-mentioned each component is 100%;
Step 2, each raw material that described step 1 is taken evenly mixes, and obtains this caving-preventing drilling fluid.
Claims (2)
1. a caving-preventing drilling fluid, it is characterized in that, according to mass percent, by following raw material, formed: polyacrylamide 0.6%～0.8%, polyacrylic acid potassium 0.3%～0.5%, without fluorescence lubricating collapse-resisting agent 4%～6%, caustic soda 0.3%～0.5%, cellulose sodium carboxymethyl 0.3%～0.5%, vinyl monomer multiple copolymer PAC-1410.3%～0.5%, water 92%～94%, the mass percent sum of above-mentioned each component is 100%.
2. a preparation method for caving-preventing drilling fluid, is characterized in that, comprises the following steps:
Step 1, according to mass percent, take respectively following raw material: polyacrylamide 0.6%～0.8%, polyacrylic acid potassium 0.3%～0.5%, without fluorescence lubricating collapse-resisting agent 4%～6%, caustic soda 0.3%～0.5%, cellulose sodium carboxymethyl 0.3%～0.5%, vinyl monomer multiple copolymer PAC-1410.3%～0.5%, water 92%～94%, the mass percent sum of above-mentioned each component is 100%;
Step 2, each raw material that described step 1 is taken evenly mixes, and obtains this caving-preventing drilling fluid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410270614.1A CN104059621A (en) | 2014-06-17 | 2014-06-17 | Anti-collapse drilling fluid and preparation method thereof |
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| CN201410270614.1A CN104059621A (en) | 2014-06-17 | 2014-06-17 | Anti-collapse drilling fluid and preparation method thereof |
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| CN201410270614.1A Pending CN104059621A (en) | 2014-06-17 | 2014-06-17 | Anti-collapse drilling fluid and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104910879A (en) * | 2015-04-09 | 2015-09-16 | 陕西海默油田服务有限公司 | Anti-sloughing drilling fluid and well slough preventing method |
| WO2018090105A1 (en) * | 2016-11-21 | 2018-05-24 | OFB Soil Binder Pty Ltd | Soil stabilizing composition |
| CN109762538A (en) * | 2019-03-07 | 2019-05-17 | 河北施奈德科技有限公司 | A kind of multifunctional polymer mud powder and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1530418A (en) * | 2003-03-10 | 2004-09-22 | 长庆石油勘探局工程技术研究院 | Secondary organic cationic polymer well drilling liquid |
| CN101108962A (en) * | 2007-08-31 | 2008-01-23 | 李宏 | Multifunctional drilling fluid additive |
| CN103013467A (en) * | 2012-12-22 | 2013-04-03 | 中国石油大学(华东) | Nonclay one-way plugging drilling fluid |
-
2014
- 2014-06-17 CN CN201410270614.1A patent/CN104059621A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1530418A (en) * | 2003-03-10 | 2004-09-22 | 长庆石油勘探局工程技术研究院 | Secondary organic cationic polymer well drilling liquid |
| CN101108962A (en) * | 2007-08-31 | 2008-01-23 | 李宏 | Multifunctional drilling fluid additive |
| CN103013467A (en) * | 2012-12-22 | 2013-04-03 | 中国石油大学(华东) | Nonclay one-way plugging drilling fluid |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104910879A (en) * | 2015-04-09 | 2015-09-16 | 陕西海默油田服务有限公司 | Anti-sloughing drilling fluid and well slough preventing method |
| CN104910879B (en) * | 2015-04-09 | 2018-06-15 | 陕西海默油田服务有限公司 | A kind of caving-preventing drilling fluid and the method for preventing well slough |
| WO2018090105A1 (en) * | 2016-11-21 | 2018-05-24 | OFB Soil Binder Pty Ltd | Soil stabilizing composition |
| CN109762538A (en) * | 2019-03-07 | 2019-05-17 | 河北施奈德科技有限公司 | A kind of multifunctional polymer mud powder and preparation method thereof |
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Application publication date: 20140924 |
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