CN105295862A - Water-based drilling fluid inhibitor composition and water-based drilling fluid and application thereof - Google Patents
Water-based drilling fluid inhibitor composition and water-based drilling fluid and application thereof Download PDFInfo
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- CN105295862A CN105295862A CN201510706230.4A CN201510706230A CN105295862A CN 105295862 A CN105295862 A CN 105295862A CN 201510706230 A CN201510706230 A CN 201510706230A CN 105295862 A CN105295862 A CN 105295862A
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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
- C09K8/035—Organic additives
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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
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention provides a water-based drilling fluid inhibitor composition and water-based drilling fluid and application thereof. The water-based drilling fluid inhibitor composition comprises the raw materials of sorbitan laurate, polyoxyethylene sorbitan stearate ester and sorbitan oleate. The water-based drilling fluid comprises the water-based drilling fluid inhibitor composition. The water-based drilling fluid inhibitor composition and the water-based drilling fluid can be used for restraining hydration expansion of shale gas shale. By means of the water-based drilling fluid inhibitor composition and the water-based drilling fluid, hydration expansion of the shale gas shale can be effectively restrained, the expansion rate of the shale can be obviously decreased, and borehole wall sloughing, jamming of a drilling tool and the like can be prevented. Therefore, the borehole wall stability is enhanced, and downhole complex conditions are reduced.
Description
Technical field
The present invention relates to a kind of water-base drilling fluid inhibitor combination and water-base drilling fluid, particularly a kind of water-base drilling fluid inhibitor combination of shale gas shale and water-base drilling fluid, belong to drilling technique field.
Background technology
China's shale gas resources workable reserve reaches 10.3 × 10
12-47.0 × 10
12cubic meter, have good fair exploration, once successfully mass-producing exploratory development, effectively can alleviate China's oil gas imbalance between supply and demand, therefore shale gas exploration and development becomes " 12 " national Major Strategic.
Present stage, horizontal drilling technology is one of core technology of shale gas exploitation, is widely used in shale gas production drilling.In order to later stage waterfrac treatment volume increase, lateral segment is distributed in natural fracture more and grows stratum, and creeps into along minimum horizontal principal stress direction.In drilling process, it is inner that drilling fluid filtrate very easily invades shale gas shale, easily causes the hydration swelling of shale gas shale, thus cause slump in, bit freezing etc.Therefore, the hydration swelling of shale gas shale is suppressed to become one of gordian technique difficult problem of horizontal well development shale gas resource.
Inhibitor, also known as anti-sloughing agent, is mainly used in preparing drilling fluid, when drilling fluid creeps into shale gas shale formation, can suppresses the hydration swelling of shale gas shale, and then the slump in, bit freezing etc. that prevent the hydration swelling due to shale gas shale from causing.At present, what China's shale gas horizontal well drilling used mostly is oil base drilling fluid, although oil base drilling fluid has excellent inhibition, but its preparation cost is higher and there is environmental issue, Slot Handling difficulty, once there is circulation problems, will cause heavy economic losses; Water-base drilling fluid then has with low cost and advantages of environment protection, but in shale gas horizontal well drilling, conventional water-base drilling fluid is difficult to this problem of hydration swelling solving shale gas shale, thus is difficult to the engineering needs meeting the exploration of shale gas horizontal well.
Therefore, research and develop a kind of shale gas shale water-base drilling fluid inhibitor combination that can effectively suppress Shale Hydration to expand, have important practical significance and application prospect.
Summary of the invention
In order to solve the problems of the technologies described above, the object of the present invention is to provide a kind of water-base drilling fluid inhibitor combination and water-base drilling fluid, this water-base drilling fluid comprises this water-base drilling fluid inhibitor combination, water-base drilling fluid inhibitor combination of the present invention and water-base drilling fluid effectively can suppress the hydration swelling of shale gas shale, obvious reduction shale expansion rate, prevent slump in, bit freezing etc., thus strengthen borehole wall stability and reduce down hole problem.
In order to realize above-mentioned technical purpose, the present invention provide firstly a kind of water-base drilling fluid inhibitor combination, and the raw material composition of this water-base drilling fluid inhibitor combination comprises: laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester.
The invention provides above-mentioned laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester and combine application as water-base drilling fluid inhibitor.
In water-base drilling fluid inhibitor combination provided by the invention, preferably, the weight ratio of laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is 1-5:1-5:1.
In water-base drilling fluid inhibitor combination provided by the invention, more preferably, the weight ratio of laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is 2-3:2-5:1.
In water-base drilling fluid inhibitor combination provided by the invention, preferably, this water-base drilling fluid inhibitor combination can also comprise water.
In water-base drilling fluid inhibitor combination provided by the invention, preferably, the gross weight of described laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is the 1%-10% of this water-base drilling fluid inhibitor combination gross weight; More preferably, the gross weight of described laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is the 5%-9% of this water-base drilling fluid inhibitor combination gross weight.
Above-mentioned water-base drilling fluid inhibitor combination provided by the invention may be used for the hydration swelling suppressing shale gas shale.
Present invention also offers a kind of water-base drilling fluid, this water-base drilling fluid comprises above-mentioned water-base drilling fluid inhibitor combination.
The invention provides above-mentioned laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester and combine application as water-base drilling fluid.
In water-base drilling fluid provided by the invention, preferably, with the weighing scale of this water-base drilling fluid, the gross weight of laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is the 5%-8% of this water-base drilling fluid gross weight.
In water-base drilling fluid provided by the invention, preferably, this water-base drilling fluid also comprises the combination of one or more in clay, plugging agent, weighting agent, tackifier, lubricant, viscosity-depression agent, fluid loss agent and flocculation agent.
In water-base drilling fluid provided by the invention, for the addition of clay, plugging agent, weighting agent, tackifier, lubricant, viscosity-depression agent, fluid loss agent and flocculation agent, there is no particular limitation, can be respectively the various content that this area is conventional.Preferably, with the weighing scale of the water contained in this water-base drilling fluid, the addition of described clay is 0%-5% (less than 5%), the addition of described plugging agent is 0%-5% (less than 5%), the addition of described weighting agent is 0%-300% (less than 300%), the addition of described tackifier is 0%-1% (less than 1%), the addition of described lubricant is 0%-5% (less than 5%), the addition of described viscosity-depression agent is 0%-5% (less than 5%), the addition of described fluid loss agent is 0%-5% (less than 5%), the addition of described flocculation agent is 0%-5% (less than 5%).
In water-base drilling fluid provided by the invention, for the kind of clay, plugging agent, weighting agent, tackifier, lubricant, viscosity-depression agent, fluid loss agent and flocculation agent, there is no particular limitation, various clays, plugging agent, weighting agent, tackifier, lubricant, viscosity-depression agent, fluid loss agent and flocculation agent that this area is conventional can be respectively, be the material that this area is common, be all commercially available;
Preferably, the clay of employing comprises the combination of one or more in wilkinite, sepiolite and attapulgite;
The plugging agent adopted comprises the combination of one or more in pitch, sulfonated gilsonite, nano silicon and nano barite;
The weighting agent adopted comprises barite and/or powdered iron ore;
The tackifier adopted comprise the combination of one or more in high adhesive aggregation cationic cellulose, high sticky sodium carboxymethyl-cellulose, acrylate and acrylamide copolymer and Natvosol;
The lubricant adopted comprises plastic pellet and/or graphite;
The viscosity-depression agent adopted comprises the combination of one or more in sulfonated methyl tannin, sulphur methyl tannin extract, Sulfonated Copolymer of Styrene and Maleic Anhydride and vinyl acetate-maleic anhydride copolymer;
The fluid loss agent adopted comprises the combination of one or more in sodium carboxymethyl-cellulose, brown coal alkali lye, nitro-humic acid sodium, chromium humic acids and carboxylic propyl group starch;
The flocculation agent adopted comprises the combination of one or more in acrylonitrile copolymer sylvite, acrylamide and sodium acrylate copolymer and complex ionic high molecular weight polymers.
Above-mentioned water-base drilling fluid provided by the invention may be used for the hydration swelling suppressing shale gas shale.
In above-mentioned water-base drilling fluid inhibitor combination provided by the invention and water-base drilling fluid, the laurostearic acid sorbitol ester of employing is Span20, and the polyoxyethylene sorbitan stearate of employing is Tween60, and the oleic acid sorbitol ester of employing is Span80.The laurostearic acid sorbitol ester adopted, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester are laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester that this area is conventional respectively, are all commercially available.
Here need the thing illustrated, to the preparation method of water-base drilling fluid inhibitor combination provided by the invention and water-base drilling fluid, there is no particular limitation, as long as each component mixed in proportion.
Water-base drilling fluid inhibitor combination of the present invention has high inhibition effect to the hydration swelling of shale gas shale, dispersion, because it has strong adsorption effect at shale pore throat and shale surface, the performance of shale pore throat and shale surface can be changed, thus to the hydration swelling of shale gas shale and dispersion, there is high inhibition effect, reduce shale expansion rate, and then slump in, bit freezing and strengthening borehole wall stability can be prevented and reduce down-hole complex accident.
Water-base drilling fluid inhibitor combination of the present invention is a kind of shale gas shale water-base drilling fluid inhibitor combination, to the hydration swelling of shale gas shale, dispersion, there is high inhibition effect, can obviously reduce shale expansion rate, prevent slump in, bit freezing etc., strengthening borehole wall stability also reduces down hole problem, is a kind of potent inhibitor composition of excellent property.
Water-base drilling fluid inhibitor combination of the present invention is a kind of shale gas shale water-base drilling fluid, effectively can suppress hydration swelling, the dispersion of shale gas shale, reduce shale expansion rate, and then slump in, bit freezing and strengthening borehole wall stability can be prevented and reduce down-hole complex accident.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and beneficial effect, existing following detailed description is carried out to technical scheme of the present invention, but can not be interpreted as to of the present invention can the restriction of practical range.
If no special instructions, each material of use is all commercially available, and wherein, laurostearic acid sorbitol ester (Span20) is produced by Chengdu Gracia chemical technology company limited; Polyoxyethylene sorbitan stearate (Tween60) is produced by Chengdu Gracia chemical technology company limited, and molecular weight is 1311.68; Oleic acid sorbitol ester (Span80) is produced by Chengdu Gracia chemical technology company limited.
Embodiment 1
Present embodiments provide a kind of water-base drilling fluid inhibitor combination, it is prepared by following steps:
3g laurostearic acid sorbitol ester, 5g polyoxyethylene sorbitan stearate, 1g oleic acid sorbitol ester and 91g deionized water are mixed, obtains water-base drilling fluid inhibitor combination.This water-base drilling fluid inhibitor can directly use as water-base drilling fluid.
Embodiment 2
Present embodiments provide a kind of water-base drilling fluid inhibitor combination, it is prepared by following steps:
3g laurostearic acid sorbitol ester, 2g polyoxyethylene sorbitan stearate, 1g oleic acid sorbitol ester and 94g deionized water are mixed, obtains water-base drilling fluid inhibitor combination.This water-base drilling fluid inhibitor can directly use as water-base drilling fluid.
Embodiment 3
Present embodiments provide a kind of water-base drilling fluid inhibitor combination, it is prepared by following steps:
2.5g laurostearic acid sorbitol ester, 3g polyoxyethylene sorbitan stearate, 1g oleic acid sorbitol ester and 93.5g deionized water are mixed, obtains water-base drilling fluid inhibitor combination.This water-base drilling fluid inhibitor can directly use as water-base drilling fluid.
Embodiment 4
Present embodiments provide a kind of water-base drilling fluid inhibitor combination, it is prepared by following steps:
2g laurostearic acid sorbitol ester, 2g polyoxyethylene sorbitan stearate, 1g oleic acid sorbitol ester and 95g deionized water are mixed, obtains water-base drilling fluid inhibitor combination.This water-base drilling fluid inhibitor can directly use as water-base drilling fluid.
Embodiment 5
Present embodiments provide a kind of water-base drilling fluid inhibitor combination, it is prepared by following steps:
3g laurostearic acid sorbitol ester, 3g polyoxyethylene sorbitan stearate, 3g oleic acid sorbitol ester and 91g deionized water are mixed, obtains water-base drilling fluid inhibitor combination.This water-base drilling fluid inhibitor can directly use as water-base drilling fluid.
Embodiment 6
Present embodiments provide a kind of water-base drilling fluid inhibitor combination, it is prepared by following steps:
4.1g laurostearic acid sorbitol ester, 4.1g polyoxyethylene sorbitan stearate, 0.8g oleic acid sorbitol ester and 91g deionized water are mixed, obtains water-base drilling fluid inhibitor combination.This water-base drilling fluid inhibitor can directly use as water-base drilling fluid.
Embodiment 7
Present embodiments provide a kind of water-base drilling fluid inhibitor combination, it is prepared by following steps:
1g laurostearic acid sorbitol ester, 7g polyoxyethylene sorbitan stearate, 1g oleic acid sorbitol ester and 91g deionized water are mixed, obtains water-base drilling fluid inhibitor combination.This water-base drilling fluid inhibitor can directly use as water-base drilling fluid.
Embodiment 8
Present embodiments provide a kind of water-base drilling fluid inhibitor combination, it is prepared by following steps:
0.33g laurostearic acid sorbitol ester, 0.55g polyoxyethylene sorbitan stearate, 0.12g oleic acid sorbitol ester and 99g deionized water are mixed, obtains water-base drilling fluid inhibitor combination.This water-base drilling fluid inhibitor can directly use as water-base drilling fluid.
Embodiment 9
Present embodiments provide a kind of water-base drilling fluid inhibitor combination, it is prepared by following steps:
3.33g laurostearic acid sorbitol ester, 5.55g polyoxyethylene sorbitan stearate, 1.12g oleic acid sorbitol ester and 90g deionized water are mixed, obtains water-base drilling fluid inhibitor combination.This water-base drilling fluid inhibitor can directly use as water-base drilling fluid.
Embodiment 10
Present embodiments provide a kind of water-base drilling fluid, it is prepared by following steps:
3g laurostearic acid sorbitol ester, 5g polyoxyethylene sorbitan stearate, 1g oleic acid sorbitol ester, 128g deionized water, 3.8g wilkinite, 2.6g nano silicon, 3.8g graphite and 2.8g sulfonated methyl tannin are mixed, obtains water-base drilling fluid.
Embodiment 11
Present embodiments provide a kind of water-base drilling fluid, it is prepared by following steps:
3g laurostearic acid sorbitol ester, 5g polyoxyethylene sorbitan stearate, 1g oleic acid sorbitol ester, 82g deionized water, 3.3g sepiolite, 2.5g pitch, 82.4g powdered iron ore and 0.8g Natvosol are mixed, obtains water-base drilling fluid.
Embodiment 12
Present embodiments provide a kind of water-base drilling fluid, it is prepared by following steps:
3g laurostearic acid sorbitol ester, 5g polyoxyethylene sorbitan stearate, 1g oleic acid sorbitol ester, 98.6g deionized water, 2g wilkinite and 2.9g sulfonated gilsonite are mixed, obtains water-base drilling fluid.
Embodiment 13
Respectively shale expansion rate determination experiment is carried out to the sodium silicate solution (comparative example 1) of the water-base drilling fluid inhibitor combination/water-base drilling fluid of embodiment 1 to embodiment 12,10wt%, 10wt% potassium formate solutions (comparative example 2) and deionized water (comparative example 3) in the present embodiment.
The experimental technique of shale expansion rate determination experiment comprises the following steps:
Use linear expansion rate determinator (LSM, purchased from North China Oilfield drilling technology institute) to measure, shale gas shale is from Zhaotong County, Yunnan 108 block;
First shale gas shale pulverizer is broken into powder, cross 100 mesh sieves, be then add a filter paper in the sample pool of 13.50 millimeters at internal diameter before adding slate flour, and the interior height in measure sample pond;
Taking 10 grams of slate flours again in sample pool adds a filter paper, then at the pressure contracting 5min of 6000psi, measures and adds slate flour and sample pool height after compression, then original page sliver height B
t0for add slate flour and sample pool height after compression with add the difference of the sample pool height before slate flour;
Sample pool is fixed in slurry cup, in slurry cup, slowly adds embodiment 1 to the embodiment 12 of 300mL and the sample of comparative example 1 to comparative example 3 respectively, and seal immediately;
Shale sheet starts to expand, the expansion height B of shale sheet when recording 24h by recorder (large pointer turns around and represents expansion 1mm, and little pointer turns around and represents expansion 1mm)
t1, measure process temperature and control to be 25 DEG C.Rate of expansion (u
t1, %) obtained by following formula: u
t1=(B
t1-B
t0) × 100/B
t0.Embodiment 1-12, the comparative example 1-3 result to shale expansion rate is as shown in table 1.
Table 1
From table 1, the comparative result of embodiment 1-12 and comparative example 1-3 is known, compare with deionized water with potassium formate solutions, inorganic silicic acid salts solution such as sodium silicate solution, water-base drilling fluid inhibitor combination and the water-base drilling fluid containing laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester of the present invention, significantly can suppress the hydration swelling of shale gas shale, can obviously reduce shale expansion rate.
From table 1, embodiment 1 is known with the comparative result of embodiment 5-7, when the weight ratio of laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is 2-3:2-5:1, the hydration swelling of shale gas shale can be suppressed further, reduce shale expansion rate further.
From table 1, embodiment 1 is known with the comparative result of embodiment 8-9, when also containing water in water-base drilling fluid inhibitor combination, when the gross weight of laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is the 5-9% of this water-base drilling fluid inhibitor combination weight, the hydration swelling of shale gas shale can be suppressed further, reduce shale expansion rate further.
From table 1, embodiment 1 is known with the comparative result of embodiment 10-12, when in water-base drilling fluid also further containing one or more in clay, plugging agent, weighting agent, tackifier, lubricant, viscosity-depression agent, fluid loss agent and flocculation agent time, the hydration swelling of shale gas shale can be suppressed further, reduce shale expansion rate further.
Above embodiment explanation, water-base drilling fluid inhibitor combination of the present invention and water-base drilling fluid, effectively can suppress the hydration swelling of shale gas shale, obviously reduces shale expansion rate, prevent slump in, bit freezing etc., thus strengthen borehole wall stability and reduce down hole problem.
Claims (10)
1. a water-base drilling fluid inhibitor combination, the raw material composition of this water-base drilling fluid inhibitor combination comprises: laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester.
2. water-base drilling fluid inhibitor combination according to claim 1, wherein, the weight ratio of described laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is 1-5:1-5:1; Preferably, the weight ratio of described laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is 2-3:2-5:1.
3. water-base drilling fluid inhibitor combination according to claim 1 and 2, wherein, this water-base drilling fluid inhibitor combination also comprises water.
4. the water-base drilling fluid inhibitor combination according to any one of claim 1-3, wherein, the gross weight of described laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is the 1%-10% of this water-base drilling fluid inhibitor combination gross weight; Preferably, the gross weight of described laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is the 5%-9% of this water-base drilling fluid inhibitor combination gross weight.
5. the application of the water-base drilling fluid inhibitor combination described in any one of claim 1-4, this water-base drilling fluid inhibitor combination is for suppressing the hydration swelling of shale gas shale.
6. a water-base drilling fluid, this water-base drilling fluid comprises the water-base drilling fluid inhibitor combination described in any one of claim 1-4.
7. water-base drilling fluid according to claim 6, wherein, with the weighing scale of this water-base drilling fluid, the gross weight of described laurostearic acid sorbitol ester, polyoxyethylene sorbitan stearate and oleic acid sorbitol ester is the 5%-8% of this water-base drilling fluid gross weight.
8. the water-base drilling fluid according to claim 6 or 7, wherein, this water-base drilling fluid also comprises the combination of one or more in clay, plugging agent, weighting agent, tackifier, lubricant, viscosity-depression agent, fluid loss agent and flocculation agent.
9. water-base drilling fluid according to claim 8, wherein, with the weighing scale of the water contained in this water-base drilling fluid, the addition of described clay is 0%-5%, and the addition of described plugging agent is 0%-5%, the addition of described weighting agent is 0%-300%, the addition of described tackifier is 0%-1%, and the addition of described lubricant is 0%-5%, and the addition of described viscosity-depression agent is 0%-5%, the addition of described fluid loss agent is 0%-5%, and the addition of described flocculation agent is 0%-5%.
10. the application of the water-base drilling fluid described in any one of claim 6-9, this water-base drilling fluid is for suppressing the hydration swelling of shale gas shale.
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| CN110305639A (en) * | 2018-03-27 | 2019-10-08 | 中国石油大学(华东) | Water-base drilling fluid and its application |
| CN111909667A (en) * | 2019-05-07 | 2020-11-10 | 中国石油天然气集团有限公司 | Shale early hydration inhibitor composition and drilling fluid |
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| CN110305639A (en) * | 2018-03-27 | 2019-10-08 | 中国石油大学(华东) | Water-base drilling fluid and its application |
| CN111909667A (en) * | 2019-05-07 | 2020-11-10 | 中国石油天然气集团有限公司 | Shale early hydration inhibitor composition and drilling fluid |
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| Publication number | Publication date |
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| CN105295862B (en) | 2018-09-04 |
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