CN110846001A - Drilling fluid for coring in high unconsolidated formation and preparation method and application thereof - Google Patents
Drilling fluid for coring in high unconsolidated formation and preparation method and application thereof Download PDFInfo
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- CN110846001A CN110846001A CN201911149029.5A CN201911149029A CN110846001A CN 110846001 A CN110846001 A CN 110846001A CN 201911149029 A CN201911149029 A CN 201911149029A CN 110846001 A CN110846001 A CN 110846001A
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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
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- 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
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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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Abstract
The invention discloses drilling fluid for coring in a high unconsolidated formation, a preparation method and application thereof, wherein the drilling fluid comprises the following components in percentage by mass: 5 to 10 percent of bentonite, 0.2 to 0.5 percent of caustic soda, 0.2 to 0.5 percent of soda ash, 0.5 to 0.8 percent of positive photoresist, 0.3 to 0.5 percent of fluid loss additive, 0.3 to 0.5 percent of polyacrylonitrile-potassium salt, 0.5 to 1 percent of polyacrylonitrile composite ammonium salt and the balance of water. The formula is used for coring in high loose strata, the yield can reach 80-90%, and compared with the prior art, the yield is obviously improved.
Description
Technical Field
The invention relates to the technical field of engineering drilling, in particular to drilling fluid for coring a high unconsolidated formation, and a preparation method and application thereof.
Background
At present in water and electricity engineering drilling field, no matter be overburden coring or basement rock coring, traditional drilling thick liquid all uses SM vegetable gum material to configure and forms, SM vegetable gum's advantage mainly can increase viscosity, reduce the effect of losing water and improving lubricity drag reduction, the shortcoming is also very obvious, lack the means to great leakage stratum, to the stratum that water sensitivity is strong, the increase of water loss volume is difficult to control to single SM vegetable gum, the condition that viscosity increases, and to fourth system loose accumulation layer or artifical filled earth stratum (high loose stratum), conventional vegetable gum drilling thick liquid is got the core harvest rate in coring process and is hanged down, the effect is relatively poor.
Disclosure of Invention
The invention aims to provide drilling fluid for coring in a high loose stratum, and solves the problem of low coring yield caused by the fact that the existing SM vegetable gum is used for coring in the high loose stratum.
In addition, the invention also provides a preparation method and application of the drilling fluid.
The invention is realized by the following technical scheme:
the drilling fluid for coring the high unconsolidated formation comprises the following components in percentage by mass:
5 to 10 percent of bentonite, 0.2 to 0.5 percent of caustic soda, 0.2 to 0.5 percent of soda ash, 0.5 to 0.8 percent of positive photoresist, 0.3 to 0.5 percent of fluid loss additive, 0.3 to 0.5 percent of polyacrylonitrile-potassium salt, 0.5 to 1 percent of polyacrylonitrile composite ammonium salt and the balance of water.
Further, the paint comprises the following components in percentage by mass:
5 to 10 percent of bentonite, 0.3 to 0.4 percent of caustic soda, 0.3 to 0.4 percent of soda ash, 0.5 to 0.8 percent of positive photoresist, 0.3 to 0.5 percent of fluid loss additive, 0.3 to 0.5 percent of polyacrylonitrile-potassium salt, 0.5 to 1 percent of polyacrylonitrile composite ammonium salt and the balance of water.
The caustic soda (NaOH) can play a role in adjusting the pH value of drilling fluid, and the sodium carbonate (Na)2CO3) Can adjust the pH of drilling fluid and control Ca2+The concentration of (c); the positive electricity glue has the functions of enhancing the positive electricity inhibition of a drilling slurry system and enhancing the stability of the slurry; the fluid loss agent, the polyacrylonitrile-potassium salt and the polyacrylonitrile composite ammonium salt play a role in regulating the flow pattern and belong to the middleAnd the small molecular polymer can control water loss, so that the drilling fluid has good rheological property, the water loss can be controlled, and the soaking of the drilling fluid in a stratum is reduced.
The applicant has demonstrated through a large number of tests:
when the formula is used for coring in a high loose stratum, the yield can reach 80-90%; compared with the prior art, the method has the advantage that the core taking rate of the existing SM vegetable gum in a high-loose stratum is 50-70 percent.
The conception of the invention is as follows:
provides a novel drilling fluid formula, improves the performance of the drilling fluid, and further achieves the purpose of improving the coring yield of the unconsolidated formation.
The invention improves the inhibition of drilling fluid to stratum by using material K-HPAN (polyacrylonitrile-potassium salt), K-HPAN (polyacrylonitrile-potassium salt) and NH4After comprehensive use, HPAN (polyacrylonitrile ammonium complex salt) plays a good role in adjusting the flow shape of drilling fluid, and enhances the dynamic shear force and static shear force of the drilling fluid, thereby ensuring the stability of carrying rocks and the integrity of lithology.
Further, the fluid loss agent is JMP-1.
The invention uses MMH (positive electricity glue) and JMP-1. The MMH (positive electricity glue) has the effects of inhibiting clay dispersion, stabilizing sandy soil and improving the characteristics of slurry, after the MMH (positive electricity glue) is prepared into the slurry, the slurry has the characteristics of low plasticity, high shear property and strong shearing and diluting capability, and has the effects of protecting the hole wall and preventing collapse, the JMP-1 is an artificially synthesized high polymer, has the function of controlling water loss, can filter water in the slurry and reduces the direct damage of artificial water to the stratum. The drilling fluid can form a mud cake to protect the hole wall through filtration loss, and the reasonable proportion of the two materials can well prevent hole leakage and ensure good stability of the hole wall.
A method of preparing a drilling fluid, such as for coring high unconsolidated formations, comprising the steps of:
1) preparing slurry: adding bentonite, a part of caustic soda and soda ash into water according to a certain proportion, uniformly mixing, then carrying out hydration treatment, and fully stirring in the hydration process;
2) preparing glue solution: mixing the other part of caustic soda, soda ash, positive charged glue, fluid loss agent, polyacrylonitrile-potassium salt and polyacrylonitrile composite ammonium salt in proportion, and hydrating;
3) when the core is drilled, the slurry is firstly added into the hole, and then the glue solution is gradually added into the hole in the process of drilling and coring.
In the drilling and coring process, the drilling slurry is continuously consumed along with the increase of the hole depth, and the glue solution needs to be supplemented in time in the drilling process, so that the performance stability of the drilling slurry is improved. It needs to be fully stirred in the preparation process.
Use of a drilling fluid for coring high unconsolidated formations, the drilling fluid being for coring high unconsolidated formations.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. when the formula is used for coring in high loose strata, the yield can reach 80-90 percent, and the yield is obviously improved.
2. The drilling fluid of the present invention has good rheological properties and can control water loss.
3. The invention improves the inhibition of drilling fluid to stratum by using material K-HPAN (polyacrylonitrile-potassium salt), K-HPAN (polyacrylonitrile-potassium salt) and NH4After comprehensive use, HPAN (polyacrylonitrile ammonium complex salt) plays a good role in adjusting the flow shape of drilling fluid, and enhances the dynamic shear force and static shear force of the drilling fluid, thereby ensuring the stability of carrying rocks and the integrity of lithology.
4. The invention uses MMH (positive electricity glue) and JMP-1. The MMH (positive electricity glue) has the effects of inhibiting clay dispersion, stabilizing sandy soil and improving the characteristics of slurry, after the MMH (positive electricity glue) is prepared into the slurry, the slurry has the characteristics of low plasticity, high shear property and strong shearing and diluting capability, and has the effects of protecting the hole wall and preventing collapse, the JMP-1 is an artificially synthesized high polymer, has the function of controlling water loss, can filter water in the slurry and reduces the direct damage of artificial water to the stratum. The drilling fluid can form a mud cake to protect the hole wall through filtration loss, and the reasonable proportion of the two materials can well prevent hole leakage and ensure good stability of the hole wall.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
Example 1:
the thickness of the loose covering layer of the drilled hole is about 63m, and the lithology of the stratum is silty clay, loose gravel soil and the like. The upper stratum is easy to absorb water and expand to cause hole shrinkage and hole wall collapse, and the drilling fluid is configured to meet the construction requirement of the upper stratum.
The first step is to prepare slurry, and the formula is as follows: fresh water + 0.2% NaOH + 0.2% Na2CO3The bentonite with the content of 10 percent is fully hydrated for 24 hours after being prepared, and is fully stirred in the hydration process to prevent and control the generation of sediment; the second cloth is prepared with glue solution, and the formula is as follows: 0.1% NaOH + 0.1% Na2CO3+ 0.6% MMH (positive charged gum) + 0.4% JMP-1+ 0.4% K-HPAN (Polyacrylonitrile-Potassium salt) + 0.8% NH4-HPAN (polyacrylonitrile complex ammonium salt), fully hydrated.
When the core is drilled, the slurry is firstly added into the hole, the glue solution is supplemented in time in the core drilling process, the glue solution is gradually added into the hole until the glue solution is used up, and the stability of the slurry performance of the drilled hole is improved. It needs to be fully stirred in the preparation process.
In the embodiment, the drilling and coring are carried out by the novel drilling slurry, and the drilling machine adopts an XY-2 type core drilling machine, a water pump BW150 type, a blender SM-1 type and a diamond bit SD110 mm. The principle of low pressure, high rotating speed and small displacement is adopted. And (4) counting the coring yield after the final hole, wherein the yield can reach 82%.
Example 2:
the thickness of the loose covering layer of the drilled hole is about 58m, and the lithology of the stratum is silty clay, sand layer and the like. The upper stratum is easy to absorb water and expand to cause hole shrinkage and hole wall collapse. The shallow layer has groundwater which pollutes the drilling fluid.
The drilling fluid is prepared to meet the construction requirements, and the formula is as follows: fresh water + 0.2% NaOH + 0.2% Na2CO3+ 10% bentonite, fully hydrated for 24 hours. Preparing glue solution, wherein the formula is as follows: 0.2% NaOH + 0.2% Na2CO3+ 0.6% MMH (positive charged gum) + 0.4% JMP-1+ 0.4% K-HPAN (Polyacrylonitrile-Potassium salt) + 0.8% NH4-HPAN (polyacrylonitrile complex ammonium salt), fully hydrated.
When the core is drilled, the slurry is firstly added into the hole, the glue solution is supplemented in time in the core drilling process, the glue solution is gradually added into the hole until the glue solution is used up, and the stability of the slurry performance of the drilled hole is improved. Stirring was sufficient during the deployment process to ensure optimum performance of the drilling fluid.
In the embodiment, the drilling and coring are carried out by the novel drilling slurry, and the drilling machine adopts an XY-2 type core drilling machine, a water pump BW150 type, a blender SM-1 type and a diamond bit SD110 mm. The principle of low pressure, high rotating speed and small displacement is adopted. And (4) counting the coring yield after the final hole, wherein the yield can reach 85%.
Example 3:
this example is based on example 1, and differs from example 1 in that:
the first step is to prepare slurry, and the formula is as follows: fresh water + 0.1% NaOH + 0.1% Na2CO3The 5% bentonite is fully hydrated for 24 hours after being prepared, and is fully stirred in the hydration process to prevent the generation of precipitates; the second cloth is prepared with glue solution, and the formula is as follows: 0.1% NaOH + 0.1% Na2CO3+ 0.5% MMH (positive charged gum) + 0.3% JMP-1+ 0.3% K-HPAN (Polyacrylonitrile-Potassium salt) + 0.5% NH4-HPAN (polyacrylonitrile complex ammonium salt), fully hydrated.
And (4) counting the coring yield after the final hole, wherein the yield can reach 81%.
Example 4:
this example is based on example 2, and differs from example 2 in that:
the drilling fluid is prepared to meet the construction requirements, and the formula is as follows: fresh water + 0.3% NaOH + 0.3% Na2CO3+ 5% bentonite, fully hydrated for 24 hours. Preparing glue solution, wherein the formula is as follows: 0.2% NaOH + 0.2% Na2CO3+ 0.8% MMH (positive charged gum) + 0.5% JMP-1+ 0.5% K-HPAN (Polyacrylonitrile-Potassium salt) + 1% NH4-HPAN (polyacrylonitrile composite ammonium salt) and fully hydrating.
And (4) counting the coring yield after the final hole, wherein the yield can reach 83%.
Comparative example 1:
drilling and coring are carried out in the working area of example 1, the thickness of a loose covering layer of the drilled hole is about 44m, the drilling and coring are carried out by adopting the traditional SM vegetable gum drilling glue solution, and the formula is as follows: fresh water and 2 to 3 percent of vegetable gum. Stirring was sufficient during the deployment process to ensure optimum performance of the drilling fluid.
In the comparative example, drilling and coring are carried out by using SM vegetable gum drilling slurry, and an XY-2 type core drilling machine, a water pump BW150 type, a stirrer SM-1 type and a drill SD110mm diamond drill bit are selected as the drilling machine. The principle of low pressure, high rotating speed and small displacement is adopted. After the final hole, the coring yield is counted, and the yield is 67%.
Comparative example 2:
the thickness of the loose covering layer of the drilled hole is about 55m, and the stratum lithology is silty clay, loose crushed soil and the like. The upper stratum is easy to absorb water and expand to cause hole shrinkage and hole wall collapse, and the drilling fluid is configured to meet the construction requirement of the upper stratum.
The first step is to prepare slurry, and the formula is as follows: fresh water + 0.2% NaOH + 0.2% Na2CO3The bentonite with the content of 10 percent is fully hydrated for 24 hours after being prepared, and is fully stirred in the hydration process to prevent and control the generation of sediment; the second cloth is prepared with glue solution, and the formula is as follows: 0.1% NaOH + 0.1% Na2CO3+ 0.4% K-HPAN (Polyacrylonitrile-Potassium salt), fully hydrated.
When the core is drilled, the slurry is firstly added into the hole, the glue solution is supplemented in time in the core drilling process, the glue solution is gradually added into the hole until the glue solution is used up, and the stability of the slurry performance of the drilled hole is improved. It needs to be fully stirred in the preparation process.
In this comparative example, core drilling was performed with the novel drilling fluid, and the drilling machine was selected from XY-2 type core drilling machine, water pump BW150 type, blender SM-1 type, and drill SD110mm diamond drill bit. The principle of low pressure, high rotating speed and small displacement is adopted. And (4) counting the coring yield after the final hole, wherein the yield can reach 70%.
Comparative example 3:
the thickness of the loose covering layer of the drilled hole in the comparative example is about 50m, and the stratum lithology is silty clay, sand layer and the like. The upper stratum is easy to absorb water and expand to cause hole shrinkage and hole wall collapse. The shallow layer has groundwater which pollutes the drilling fluid.
The drilling fluid is prepared to meet the construction requirements, and the formula is as follows: fresh water + 0.2% NaOH + 0.2% Na2CO3+ 10% bentonite, fully hydrated for 24 hours. Preparing glue solution, wherein the formula is as follows: 0.2% NaOH + 0.2% Na2CO3+ 0.6% MMH (positive charged gum) + 0.4% JMP-1+ 0.4% K-HPAN (Polyacrylonitrile-Potassium salt), fully hydrated.
When the core is drilled, the slurry is firstly added into the hole, the glue solution is supplemented in time in the core drilling process, the glue solution is gradually added into the hole until the glue solution is used up, and the stability of the slurry performance of the drilled hole is improved. Stirring was sufficient during the deployment process to ensure optimum performance of the drilling fluid.
In this comparative example, core drilling was performed with the novel drilling fluid, and the drilling machine was selected from XY-2 type core drilling machine, water pump BW150 type, blender SM-1 type, and drill SD110mm diamond drill bit. The principle of low pressure, high rotating speed and small displacement is adopted. And (4) counting the coring yield after the final hole, wherein the yield can reach 73%.
The properties of examples 1-4, comparative examples 1-3 are shown in table 1:
TABLE 1
By comparing the data of examples 1 to 4 with those of comparative examples 1 to 3, it can be seen that:
1. the drilling fluid adopting the formula provided by the invention has the yield of more than 80% and is far more than 67% of the yield of the drilling fluid adopting the vegetable gum.
2. Only the positive electricity glue and the fluid loss agent are used, or only the positive electricity glue, the fluid loss agent and the polyacrylonitrile-potassium salt are used, and the harvesting rate is only about 70 percent.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The drilling fluid for coring the high unconsolidated formation is characterized by comprising the following components in percentage by mass:
5 to 10 percent of bentonite, 0.2 to 0.5 percent of caustic soda, 0.2 to 0.5 percent of soda ash, 0.5 to 0.8 percent of positive photoresist, 0.3 to 0.5 percent of fluid loss additive, 0.3 to 0.5 percent of polyacrylonitrile-potassium salt, 0.5 to 1 percent of polyacrylonitrile composite ammonium salt and the balance of water.
2. A drilling fluid for coring of high unconsolidated formations according to claim 1, consisting of, in mass percent:
10 percent of bentonite, 0.3 to 0.4 percent of caustic soda, 0.3 to 0.4 percent of soda ash, 0.5 to 0.8 percent of positive photoresist, 0.3 to 0.5 percent of fluid loss additive, 0.3 to 0.5 percent of polyacrylonitrile-potassium salt, 0.5 to 1 percent of polyacrylonitrile composite ammonium salt and the balance of water.
3. A drilling fluid for coring from a high unconsolidated formation as defined by any of claims 1-3, wherein the fluid loss agent is JMP-1.
4. A method of preparing a drilling fluid for coring a high unconsolidated formation as defined by any one of claims 1 to 3, comprising the steps of:
1) preparing slurry: adding bentonite, a part of caustic soda and soda ash into water according to a certain proportion, uniformly mixing, then carrying out hydration treatment, and fully stirring in the hydration process;
2) preparing glue solution: mixing the other part of caustic soda, soda ash, positive charged glue, fluid loss agent, polyacrylonitrile-potassium salt and polyacrylonitrile composite ammonium salt in proportion, and hydrating;
3) when the core is drilled, the slurry is firstly added into the hole, and then the glue solution is gradually added into the hole in the process of drilling and coring.
5. Use of a drilling fluid for coring from a high unconsolidated formation as claimed in any one of claims 1 to 3, wherein the drilling fluid is used for coring from a high unconsolidated formation.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101389729A (en) * | 2006-02-23 | 2009-03-18 | 赫尔克里士公司 | Ethoxylated raw cotton linters for completion and workover fluids |
| CN101538456A (en) * | 2009-04-10 | 2009-09-23 | 西安石油大学 | Nanometer drilling fluid |
| CN101675139A (en) * | 2007-03-02 | 2010-03-17 | 技术之星能源服务公司 | Drilling fluid and method for drilling in coal-containing formations |
| CN106543988A (en) * | 2016-11-05 | 2017-03-29 | 西南石油大学 | A kind of drilling shale filtrate reducing caving control drilling fluid |
-
2019
- 2019-11-21 CN CN201911149029.5A patent/CN110846001A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101389729A (en) * | 2006-02-23 | 2009-03-18 | 赫尔克里士公司 | Ethoxylated raw cotton linters for completion and workover fluids |
| CN101675139A (en) * | 2007-03-02 | 2010-03-17 | 技术之星能源服务公司 | Drilling fluid and method for drilling in coal-containing formations |
| CN101538456A (en) * | 2009-04-10 | 2009-09-23 | 西安石油大学 | Nanometer drilling fluid |
| CN106543988A (en) * | 2016-11-05 | 2017-03-29 | 西南石油大学 | A kind of drilling shale filtrate reducing caving control drilling fluid |
Non-Patent Citations (10)
| Title |
|---|
| 代一钦: "吉尔吉斯斯坦阿拉伊地区SA1井钻井液技术 ", 《钻井液与完井液》 * |
| 何竹梅等: "江苏油田钻完井液对N80套管腐蚀研究 ", 《石油化工腐蚀与防护》 * |
| 卢永霞: "鄂北地区钻井液技术 ", 《机械管理开发》 * |
| 孙建华等: "丰深1-斜1井高密度小井眼钻井液技术 ", 《钻井液与完井液》 * |
| 李枫等: "松辽盆地南部地区小眼井钻井实践 ", 《石油钻探技术》 * |
| 杜道勇等: "江苏油田花17断块钻井液技术 ", 《小型油气藏》 * |
| 樊明皓等: "群库恰克地区井壁失稳影响因素的研究 ", 《山东国土资源》 * |
| 王建军: "正电胶+钾盐聚磺钻井液体系在沙南油田的应用 ", 《新疆有色金属》 * |
| 蔡元等: "多台阶变方位高难度水平井钻井技术 ", 《钻采工艺》 * |
| 鄢捷年，宗瑞国，蒋官澄: "正电胶钻井完井液在官H2短半径水平井中的应用 ", 《石油钻探技术》 * |
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