CN110734746A - leak-proof leak-stopping adhesive - Google Patents
leak-proof leak-stopping adhesive Download PDFInfo
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- CN110734746A CN110734746A CN201911321295.1A CN201911321295A CN110734746A CN 110734746 A CN110734746 A CN 110734746A CN 201911321295 A CN201911321295 A CN 201911321295A CN 110734746 A CN110734746 A CN 110734746A
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- parts
- viscosity
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- leak
- plugging
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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
- C09K8/03—Specific additives for general use in well-drilling compositions
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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
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
Abstract
The invention discloses leak-proof plugging viscosity increasing agents, which comprise hydroxyethyl cellulose (HEC), high-viscosity sodium carboxymethyl cellulose (CMC-HV), a tackifier (80A-51) for drilling fluid, carboxymethyl hydroxyethyl cellulose (CMHEC), viscosity polyvinyl alcohol, and high-viscosity polyanionic cellulose (HV-PAC), wherein the substances are sequentially added into a container according to the components and the content of the substances at normal temperature and normal pressure, are uniformly mixed and stirred, and are dried and crushed into granular products.
Description
Technical Field
The invention relates to the technical field of drilling well plugging agents, in particular to kinds of anti-leakage plugging viscosity increasing agents.
Background
The conventional plugging agent adopted after the low-pressure stratum in the petroleum drilling is lost, high-molecular polymer polyacrylamide, high-medium viscosity sodium carboxymethylcellulose and the like are used as plugging and viscosity-increasing additives which play a role in the petroleum drilling operation, but the plugging additives have the following defects or shortcomings that ① single viscosity-increasing agent viscosity-increasing efficiency is low, bridging plugging agent materials are difficult to add in the plugging slurry preparation, ② single additives have poor viscosity-increasing stability and cannot increase the viscosity of the plugging agent to a higher range, ③ has poor salt and calcium resistance, when the plugging additives meet metal ions, rapid viscosity reduction or flocculation cannot be kept in a leakage crack channel, the plugging additives can easily flow into the deep part of the stratum, the plugging effect is poor, ④ temperature resistance is low, the plugging agent is easy to degrade in a high-temperature stratum plugging, the consumption of the plugging material is large, the plugging time is long, the plugging cost is high, and ⑤ enables the viscosity of the whole plugging agent to be difficult to increase and generate repeated leakage stoppage, and the leakage effect cannot be achieved, so that the complicated downhole is easily caused.
Disclosure of Invention
The invention aims to provide leak-proof plugging viscosity increasing agents, which are compounded by a plurality of materials with various types of viscosity increasing degrees and different properties, have high viscosity and solid phase containing capacity in a leakage passage, good retention property, high salt resistance, calcium resistance and temperature resistance, enter the leakage passage, have good plugging effect and safe and quick leak-proof construction, can be compounded with other leak-proof materials to be applied in leak-proof formulas with different properties, and can effectively overcome or avoid the defects in the prior art.
The invention relates to leak-proof leak-stopping viscosity increasing agent, which comprises the following components in parts by weight:
0.1-3 parts of hydroxyethyl cellulose (HEC); 0.1-5 parts of sodium carboxymethyl cellulose CMC-HV; 0.1-1 part of tackifier for drilling fluid; 0.1-5 parts of carboxymethyl hydroxyethyl cellulose CMHEC; 1-5 parts of polyvinyl alcohol; polyanionic cellulose HV-PAC0.1-3 parts.
The preparation method comprises the following steps: the above materials are sequentially added into a container according to the components and contents thereof at normal temperature and normal pressure, mixed and stirred uniformly, dried, crushed or sieved into granular products with the grain diameter of 0.05 mm-0.8 mm.
The technical scheme can be further optimized in steps as follows:
leak-proof leak-stopping viscosity increasing agent comprises, by weight, 0.1 part of hydroxyethyl cellulose HEC, 0.1 part of sodium carboxymethyl cellulose CMC-HV, 0.1 part of tackifier for drilling fluid, 0.1 part of carboxymethyl hydroxyethyl cellulose CMHEC, 1 part of polyvinyl alcohol and 0.1 part of polyanionic cellulose HV-PAC.
leak-proof leak-stopping viscosity increasing agent comprises, by weight, 1 part of hydroxyethyl cellulose (HEC), 2 parts of sodium carboxymethyl cellulose (CMC-HV), 0.5 part of tackifier for drilling fluid, 1 part of carboxymethyl hydroxyethyl cellulose (CMHEC), 2 parts of polyvinyl alcohol and 1 part of polyanionic cellulose (HV-PAC).
leak-proof leak-stopping viscosity increasing agent comprises, by weight, 2 parts of hydroxyethyl cellulose (HEC), 3 parts of sodium carboxymethyl cellulose (CMC-HV), 0.8 part of tackifier for drilling fluid, 3 parts of carboxymethyl hydroxyethyl cellulose (CMHEC), 4 parts of polyvinyl alcohol and 2 parts of polyanionic cellulose (HV-PAC).
leak-proof leak-stopping viscosity increasing agent comprises, by weight, 3 parts of hydroxyethyl cellulose (HEC), 5 parts of sodium carboxymethyl cellulose (CMC-HV), 1 part of tackifier for drilling fluid, 5 parts of carboxymethyl hydroxyethyl cellulose (CMHEC), 5 parts of polyvinyl alcohol and 3 parts of polyanionic cellulose (HV-PAC).
Preferably, the viscosifier for drilling fluid is a viscosifier for drilling fluid of type 80A-51.
Preferably, the sodium carboxymethyl cellulose CMC-HV is a high-viscosity sodium carboxymethyl cellulose CMC-HV, and the viscosity thereof is as follows: 350-600 mPas under the condition that the mass fraction of the aqueous solution is 2 percent and the temperature is 25 ℃; the polyvinyl alcohol is high-viscosity polyvinyl alcohol, and the viscosity of the polyvinyl alcohol is 40-65mPa & s; the polyanionic cellulose HV-PAC is high-viscosity polyanionic cellulose HV-PAC, and the viscosity of the polyanionic cellulose HV-PAC is not less than 50 mPa & s.
Preferably, the carboxymethyl hydroxyethyl cellulose CMHEC has a viscosity of 5 to 150000 mPas.
Compared with the prior art, the invention mainly has the following beneficial technical effects:
1. the viscosity of the leakage plugging slurry can be rapidly improved;
2. strong salt resistance and calcium resistance; the plugging viscosity is not reduced in a high-salt high-calcium stratum;
3. the temperature resistance is strong; the plugging agent is used for plugging a high-temperature leakage stratum;
4. a flow pattern with high plasticity and low dynamic shear can be formed, the circulating pressure consumption is low, and the leakage-proof effect is good;
5. the plugging agent is easy to pump in under the state of high viscosity plugging slurry and low flow resistance, so that solid and liquid enter a leakage channel simultaneously, and the success rate of plugging is obviously improved;
6. the compatibility is good, and the plugging slurry can be matched with plugging slurry with any performance, and the viscosity, the coating property and the fluidity of the prepared plugging slurry can be improved;
7. the application range of is suitable for high-density leakage-stopping slurry, high-strength leakage-stopping slurry, high-temperature leakage-stopping slurry, brine leakage-stopping slurry and the like, and the adhesive has obvious adhesion-improving effect and good leakage-stopping effect.
8. No toxicity, no environmental pollution and easy harmless treatment.
The specific implementation mode is as follows:
the present invention will be described in detail with reference to examples.
Example 1
leak-proof plugging viscosity improver comprises, by weight, 0.1 part of hydroxyethyl cellulose (HEC), 0.1 part of high-viscosity sodium carboxymethyl cellulose (CMC-HV), 0.1 part of tackifier (80A-51) for drilling fluid, 0.1 part of carboxymethyl hydroxyethyl cellulose (CMHEC), 1 part of high-viscosity polyvinyl alcohol, and 0.1 part of high-viscosity polyanionic cellulose (HV-PAC).
The preparation method comprises the following steps: the above materials are sequentially added into a container according to the components and contents thereof at normal temperature and normal pressure, mixed and stirred uniformly, dried, crushed or sieved into granular products with the grain diameter of 0.05 mm-0.8 mm.
When in use, the leakage-proof and leakage-stopping viscosity improver is added into leakage-stopping drilling fluid, wherein the total amount of the leakage-stopping drilling fluid is 0.1 percent. The 0.1 percent is volume weight ratio, namely, 0.1 ton of the leak-proof plugging viscosity improver is added into every 100 square of the plugging drilling fluid.
The formula of the plugging drilling fluid comprises: well slurry or (clear water 100 square +6-8% bentonite +0.3% sodium carbonate +0.2% PAM + barite) + (1% -2%) sawdust +3-5% cotton seed hull +2-3% walnut shell +3% coarse walnut shell +2-4% plugging agent while drilling +2-3% mica. The particle size of the walnut shell is 0.5-1mm, and the particle size of the coarse walnut shell is 2-5mm, which are the same as the following. The percentage of the formulation is volume weight ratio, i.e. ton based on 100 square, for example (6% -8%) bentonite, i.e. 6-8 ton bentonite is added into 100 square of clear water; the formulations in the following examples are as defined in this example.
Example 2
leak-proof plugging viscosity improver comprises, by weight, 1 part of hydroxyethyl cellulose (HEC), 2 parts of high-viscosity sodium carboxymethyl cellulose (CMC-HV), 0.5 part of tackifier (80A-51) for drilling fluid, 1 part of carboxymethyl hydroxyethyl cellulose (CMHEC), 2 parts of high-viscosity polyvinyl alcohol and 1 part of high-viscosity polyanionic cellulose (HV-PAC).
The preparation method comprises the following steps: the above materials are sequentially added into a container according to the components and contents thereof at normal temperature and normal pressure, mixed and stirred uniformly, dried, crushed or sieved into granular products with the grain diameter of 0.05 mm-0.8 mm.
When the plugging drilling fluid is used, leak-proof plugging viscosity improvers of the invention are added into the plugging drilling fluid, wherein the total amount of the plugging drilling fluid is 1 percent, and the 1 percent is the volume-weight ratio, namely, 1 ton of leak-proof plugging viscosity improver is added into every 100 square of the plugging drilling fluid.
The formula of the plugging drilling fluid comprises: well slurry or (clear water 100 square +6-8% bentonite +0.3% sodium carbonate +0.2% PAM + barite) + (1% -2%) sawdust +3-5% cotton seed hull +2-3% walnut shell +3% coarse walnut shell +2-4% plugging agent while drilling +2-3% mica.
Example 3
leak-proof plugging viscosity improver comprises, by weight, 2 parts of hydroxyethyl cellulose (HEC), 3 parts of high-viscosity sodium carboxymethyl cellulose (CMC-HV), 0.8 part of tackifier (80A-51) for drilling fluid, 3 parts of carboxymethyl hydroxyethyl cellulose (CMHEC), 4 parts of high-viscosity polyvinyl alcohol and 2 parts of high-viscosity polyanionic cellulose (HV-PAC).
The preparation method comprises the following steps: the above materials are sequentially added into a container according to the components and contents thereof at normal temperature and normal pressure, mixed and stirred uniformly, dried, crushed or sieved into granular products with the grain diameter of 0.05 mm-0.8 mm.
When the plugging drilling fluid is used, leak-proof plugging viscosity improvers of the invention are added into the plugging drilling fluid, wherein the total amount of the plugging drilling fluid is 3%, and the 3% is the volume-weight ratio, namely, 3 tons of leak-proof plugging viscosity improvers are added into 100 prescriptions of the plugging drilling fluid.
The formula of the plugging drilling fluid comprises: well slurry or (clear water 100 square +6-8% bentonite +0.3% sodium carbonate +0.2% PAM + barite) + (1% -2%) sawdust +3-5% cotton seed hull +2-3% walnut shell +3% coarse walnut shell +2-4% plugging agent while drilling +2-3% mica.
Example 4
leak-proof plugging viscosity improver comprises, by weight, 3 parts of hydroxyethyl cellulose (HEC), 5 parts of high-viscosity sodium carboxymethyl cellulose (CMC-HV), 1 part of tackifier (80A-51) for drilling fluid, 5 parts of carboxymethyl hydroxyethyl cellulose (CMHEC), 5 parts of high-viscosity polyvinyl alcohol and 3 parts of high-viscosity polyanionic cellulose (HV-PAC).
The preparation method comprises the following steps: the above materials are added into a container according to the components and contents thereof by a conventional preparation method at normal temperature and normal pressure, mixed and stirred uniformly, dried, crushed or sieved into granular products with the grain diameter of 0.05 mm-0.8 mm.
When the plugging drilling fluid is used, leak-proof plugging viscosity improvers of the invention are added into the plugging drilling fluid, wherein the amount of the leak-proof plugging viscosity improvers is 5 percent of the total amount of the plugging drilling fluid, and the 5 percent is a volume-weight ratio, namely, 5 tons of leak-proof plugging viscosity improvers are added into per 100 prescriptions of the plugging drilling fluid.
In examples 1 to 4, each of the above components was commercially available.
The hydroxyethyl cellulose HEC is white to light yellow fibrous or powdery solid, is nontoxic, tasteless, and easily soluble in water, is insoluble in -like organic solvents, and is obtained from Meixin Hupo Biotech, Inc. in various embodiments of the invention.
The high-viscosity sodium carboxymethyl cellulose CMC-HV is white or yellowish flocculent fiber powder or white powder in appearance, is odorless, tasteless and nontoxic, is easily dissolved in cold water or hot water to form a transparent solution with constant viscosity, and is used as an adhesive, a thickening agent, a suspending agent, an emulsifying agent, a dispersing agent, a stabilizing agent, a sizing agent and the like.
The tackifier (80A-51) for the drilling fluid is white or light yellow free-flowing powder, is a copolymer of acrylamide and sodium acrylate, has good tackifying, flocculating and shearing diluting performances, and is purchased from Puyang Xin environmental protection science and technology Limited company.
The carboxymethyl hydroxyethyl cellulose CMHEC is white or yellowish powder, the viscosity is 5-150000 mPa.s, and the product in each embodiment of the invention is purchased from Hebei Tianwei chemical Co Ltd.
The high-viscosity polyvinyl alcohol is an organic compound, is white flaky, flocculent or powdery solid and is tasteless, and the product in each embodiment of the invention is purchased from Shanghai Hughai industry Co., Ltd, and has the viscosity of 40-65mPa & s.
The high-viscosity polyanionic cellulose HV-PAC is white to light yellow powder or particles, is tasteless and nontoxic, has strong hygroscopicity, is easily dissolved in cold water and hot water, is a water-soluble cellulose ether derivative prepared by chemically modifying natural cellulose, is produced by Shandong Yanggu Longquan chemical plants in various embodiments of the invention, and has the viscosity of more than or equal to 50 mPa & s.
The formula of the plugging drilling fluid comprises: well slurry or (clear water 100 square +6-8% bentonite +0.3% sodium carbonate +0.2% PAM + barite) + (1% -2%) sawdust +3-5% cotton seed hull +2-3% walnut shell +3% coarse walnut shell +2-4% plugging agent while drilling +2-3% mica. The percentages in the above formula are volume to weight ratios, i.e. tons based on 100 square, for example (6-8%) bentonite, i.e. 6-8 tons bentonite per 100 square of clear water.
The leakage-preventing, plugging and viscosity-increasing agent prepared in the above examples 1 to 4 was named TRS-DV type leakage-preventing, plugging and viscosity-increasing agent by Dongyutell Petroleum technologies Co.
The leak-proof plugging viscosity increasing agents prepared in the examples 1 to 4 have good viscosity increasing and plugging effects in field use, the addition amount is volume-weight ratio, and the magadiite viscosity (unit, s (sec)) of the plugging drilling fluid before and after the addition of the viscosity increasing agent is measured by using a magadiite viscometer according to an API standard test method and is detailed in table 1.
TABLE 1 characterization of technical Properties of leak-proof plugging viscosity-increasing agent
The leak-proof leak-stopping adhesion promoter prepared in the examples 1 to 4 has strong salt resistance and calcium resistance in field use; the plugging viscosity in high salt and high calcium formations was not reduced as detailed in table 2.
TABLE 2 viscosity of leak-proof, leak-stopping and viscosity-increasing agent under high salt and high calcium conditions
As can be seen from tables 1 and 2, the plugging slurry of the invention can rapidly improve the viscosity of the plugging slurry in field use, has strong salt resistance and calcium resistance, and also has enhanced plugging viscosity in high-salt and high-calcium formations. In addition, the plugging agent is compounded by various materials with various types of viscosity increasing and different properties, has high viscosity and solid phase containing capacity in the leakage passage, has good retention property, high salt resistance, calcium resistance and temperature resistance, enters the leakage passage, has good plugging effect and safe and quick plugging construction, and can be compounded in plugging formulas with different properties after being combined with other plugging materials for application.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (8)
1, kinds of leak-proof leak stoppage adhesion promoter, which is characterized by comprising the following components in parts by weight:
0.1-3 parts of hydroxyethyl cellulose (HEC);
0.1-5 parts of sodium carboxymethyl cellulose CMC-HV;
0.1-1 part of tackifier for drilling fluid;
0.1-5 parts of carboxymethyl hydroxyethyl cellulose CMHEC;
1-5 parts of polyvinyl alcohol;
polyanionic cellulose HV-PAC0.1-3 parts;
the preparation method comprises the following steps: the above materials are sequentially added into a container according to the components and contents thereof at normal temperature and normal pressure, mixed and stirred uniformly, dried, crushed or sieved into granular products with the grain diameter of 0.05 mm-0.8 mm.
2. A leak-proof leak-stopping adhesive as defined in claim 1, which is characterized in that: the paint comprises the following components in parts by weight: 0.1 part of hydroxyethyl cellulose (HEC); 0.1 part of CMC-HV; 0.1 part of tackifier for drilling fluid; 0.1 part of carboxymethyl hydroxyethyl cellulose CMHEC; 1 part of polyvinyl alcohol; polyanionic cellulose HV-PAC0.1 part.
3. A leak-proof leak-stopping adhesive as defined in claim 1, which is characterized in that: the paint comprises the following components in parts by weight: 1 part of hydroxyethyl cellulose (HEC); sodium carboxymethyl cellulose CMC-HV 2; 0.5 part of tackifier for drilling fluid; 1 part of carboxymethyl hydroxyethyl cellulose CMHEC; 2 parts of polyvinyl alcohol; polyanionic cellulose HV-PAC 1 part.
4. A leak-proof leak-stopping adhesive as defined in claim 1, which is characterized in that: the paint comprises the following components in parts by weight: 2 parts of hydroxyethyl cellulose (HEC); CMC-HV 3 shares of sodium carboxymethyl cellulose; 0.8 part of tackifier for drilling fluid; 3 parts of carboxymethyl hydroxyethyl cellulose CMHEC; 4 parts of polyvinyl alcohol; polyanionic cellulose HV-PAC 2 parts.
5. A leak-proof leak-stopping adhesive as defined in claim 1, which is characterized in that: the paint comprises the following components in parts by weight: 3 parts of hydroxyethyl cellulose (HEC); 5 parts of sodium carboxymethyl cellulose CMC-HV; 1 part of tackifier for drilling fluid; 5 parts of carboxymethyl hydroxyethyl cellulose CMHEC; 5 parts of polyvinyl alcohol; polyanionic cellulose HV-PAC 3 parts.
6. The leakage-proof plugging viscosity enhancer as claimed in any of claims 1-5, wherein the viscosity enhancer for drilling fluid is 80A-51 type viscosity enhancer for drilling fluid.
7. The anti-leakage, plugging and viscosity increasing agent according to any of claims 1-5, wherein the CMC-HV is high viscosity CMC-HV, the viscosity is 350-600mPa s under the condition of 25 ℃ of an aqueous solution with a mass fraction of 2%, the viscosity of the polyvinyl alcohol is high viscosity polyvinyl alcohol, the viscosity of the polyvinyl alcohol is 40-65mPa s, and the viscosity of the polyanion cellulose HV-PAC is high viscosity polyanion cellulose HV-PAC, the viscosity of the polyanion cellulose HV-PAC is not less than 50 mPa s.
8. The leakage-preventing, plugging and viscosity-improving agent according to any one of claims 1-5- , wherein the carboxymethyl hydroxyethyl cellulose CMHEC has a viscosity of 5-150000 mPas.
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| CN201911321295.1A CN110734746A (en) | 2019-12-20 | 2019-12-20 | leak-proof leak-stopping adhesive |
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| CN201911321295.1A CN110734746A (en) | 2019-12-20 | 2019-12-20 | leak-proof leak-stopping adhesive |
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| CN110734746A true CN110734746A (en) | 2020-01-31 |
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| CN104140790A (en) * | 2013-10-28 | 2014-11-12 | 中国石油化工集团公司 | Water-soluble polymer tackifier for oilfield and preparation method thereof |
| CN104357028A (en) * | 2014-09-30 | 2015-02-18 | 苏州长盛机电有限公司 | Water-based drilling fluid tackifier and preparation method thereof |
| CN104804715A (en) * | 2015-03-18 | 2015-07-29 | 西南石油大学 | Modified hydroxyethyl cellulose tackifier for well drilling and preparation method thereof |
| CN105324459A (en) * | 2013-03-20 | 2016-02-10 | 埃尔凯姆有限公司 | Viscosifier for oil well fluids |
| CN107974242A (en) * | 2017-11-15 | 2018-05-01 | 周益铭 | A kind of drilling fluid tackifier |
| WO2019175792A1 (en) * | 2018-03-14 | 2019-09-19 | Oren Hydrocarbons Private Limited | Drilling fluid system for controlling loss circulation |
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2019
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| CN105324459A (en) * | 2013-03-20 | 2016-02-10 | 埃尔凯姆有限公司 | Viscosifier for oil well fluids |
| CN104140790A (en) * | 2013-10-28 | 2014-11-12 | 中国石油化工集团公司 | Water-soluble polymer tackifier for oilfield and preparation method thereof |
| CN104357028A (en) * | 2014-09-30 | 2015-02-18 | 苏州长盛机电有限公司 | Water-based drilling fluid tackifier and preparation method thereof |
| CN104804715A (en) * | 2015-03-18 | 2015-07-29 | 西南石油大学 | Modified hydroxyethyl cellulose tackifier for well drilling and preparation method thereof |
| CN107974242A (en) * | 2017-11-15 | 2018-05-01 | 周益铭 | A kind of drilling fluid tackifier |
| WO2019175792A1 (en) * | 2018-03-14 | 2019-09-19 | Oren Hydrocarbons Private Limited | Drilling fluid system for controlling loss circulation |
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Application publication date: 20200131 |