CN105838344A - High-temperature-resistance salt water drilling fluid for drilling shale - Google Patents
High-temperature-resistance salt water drilling fluid for drilling shale Download PDFInfo
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- CN105838344A CN105838344A CN201610247841.1A CN201610247841A CN105838344A CN 105838344 A CN105838344 A CN 105838344A CN 201610247841 A CN201610247841 A CN 201610247841A CN 105838344 A CN105838344 A CN 105838344A
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- drilling fluid
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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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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a high-temperature-resistant salt water drilling fluid for drilling shale. The drilling fluid can maintain stable borehole and is resistant to salt and high temperature. According to the technical scheme, the drilling fluid is prepared from the following raw material components in mass (g): 900-1000g of running water, 40-80g of bentonite for drilling fluid, 2-4g of Na2CO3, 180-200g of NaCl, 20-30g of shale inhibitor FT103 for drilling fluid, 10-20g of a tackifying filtrate reducer for drilling fluid SRLS-Z3, 3-5g of a salt-resistant and high temperature and pressure resistant filtrate reducer for drilling fluid RSTF-532, 10-25g of a lubricating and anti-sloughing agent for drilling fluid RS-1, 2-4g of a filtrate reducer KJAN and 10-15g of a high-temperature-resistant salt-resistant extreme pressure lubricant HEP-1; system pH is adjusted to be 9 with NaOH solution with the mass percentage concentration of 40%, system density is weighted to 1.30g/cm<3> with a weighting agent for drilling fluid barite, and the high-temperature-resistant salt water drilling fluid for drilling the shale is obtained. The drilling fluid provided by the invention produces less environmental pollution, has good rheological property, low fluorescence and strong sealing inhibiting capacity and is used for shale drilling.
Description
Technical field
The present invention relates to a kind of creep into the temperature resistance salt water drilling fluid of shale for shale gas exploitation, it is possible to maintain wellbore stability, anti-salt temperature resistance, be particularly suitable for the creeping into of deep formation of the long net horizontal section of shale that microcrack is grown.
Background technology
Along with shale gas exploitation rise at home, successfully creeping into shale gas well becomes one of current major issue.The exploitation of shale gas is to solve current domestic petroleum resources anxiety, it is achieved produces in oil gas increasing the storage, ensures the most important thing of national energy security.Shale formation was to study as non-reservoir in the past; but along with the exploration and development of shale gas enters commercial mining substantial period; shale formation is developed as main force's reservoir; shale formation water-sensitive is more weak; sloughing mechanism is the most biased; often resulting in when creeping into shale formation and occur that filtrate invades when carrying out long horizontal well drilling, borehole wall generating period caves in；If boring chance crack to block not in time, then there will be the phenomenons such as hole collapse.The situation that this conventional meeting accidentally occurs in big section mud cream rock straight well section, but becomes inevitable situation in shale gas drilling process, is horizontal well in addition, and therefore its complexity is higher.Therefore the performance such as the inhibition of drilling fluid and stability is highly important for successfully creeping into.
Mainly using oil base drilling fluid during current domestic shale gas horizontal well drilling, but oil base drilling fluid high cost, high pollution are its natural flaws, it is inevitable that water-base drilling fluid replaces it to creep into shale formation, has been achieved with the most in this respect being much in progress.The pluses and minuses water-base drilling fluid advantage comparing oil base drilling fluid has: 1. environmental protection；2. natural gas leaching easily finds；3. temperature convection degeneration impact is less；4. cost is relatively low；5. meet leakage to be easily processed.Shortcoming has: 1. borehole wall stability is poor；2. heat stability is relatively poor, it is easy to high temperature gel；3. resistance tocrocking is poor, and it is big that maintenance processes workload；4. lubrication anti-sticking scarce capacity.Therefore, develop a kind of novel water-based drilling fluid replacement oil base drilling fluid that can be suitably used for shale formation and can solve the problem that the problem such as wellbore stability, reservoir pollution is then the key technology of current shale gas drilling well, be also the difficult point place of domestic and international shale drilling well.
Summary of the invention
It is an object of the invention to: the problem such as the stability of borehole well instability and anti-salt contamination, temperature resistance during in order to overcome currently used water-base drilling fluid to creep into deep layer shale formation, suppression Shale Hydration dispersion, special provide a kind of salt water base temperature resistance drilling fluid for this.
In order to achieve the above object, the present invention is by the following technical solutions: one creeps into shale temperature resistance salt water drilling fluid, it is characterized in that preparing the raw materials used component of this drilling fluid and content thereof, and its mass unit is gram:
Adding water with sodium hydroxide and be made into the alkali liquor that mass percentage concentration is 40%, regulation system pH value is 8.5；System density is increased the weight of to 1.30g/cm with drilling fluid heavy weight additive barite3。
The preparation method that the present invention is a kind of creeps into shale temperature resistance salt water drilling fluid is:
Water temperature is risen to 65 DEG C by the tap water first measuring 900-1000 gram, adds the drilling fluid bentonite of 40-80 gram under low speed 600r/min electric stirring, stirs 10 minutes and adds 2-4 gram of Na2CO3It is stirred for 30 minutes, prehydration 24h under normal temperature and pressure；Under low speed 500r/min electric stirring, add 180-200 gram of NaCl again stir 10 minutes, add 20-30 gram of shale-control agent for drilling fluid FT103 to stir 10 minutes, add 10-20 gram of drilling fluid thickening fluid loss additive SRLS-Z3 to stir 5 minutes, add 3-5 gram of drilling fluid salt-resisting high-temperature-resisting high pressure drop fluid loss agents RSTF-532 to stir 10 minutes, add 10-25 gram of lubricating collapse-resisting agent for drilling fluid RS-1 to stir 10 minutes, add 2-4 gram of fluid loss additive KJAN to stir 5 minutes, be subsequently adding 10-15 gram of heat and salinity tolerance extreme-pressure lubricant HEP-1 and stir 10 minutes；Finally adding water with NaOH and be configured to the alkali liquor of mass percentage concentration 40%, system pH of adjustment is 9, stirs 1 hour, increases the weight of system density to 1.30g/cm with drilling fluid heavy weight additive barite3, prepare and originally creep into shale temperature resistance salt water drilling fluid.
Drilling fluid bentonite, shale-control agent for drilling fluid FT103, drilling fluid thickening fluid loss additive SRLS-Z3, drilling fluid salt-resisting high-temperature-resisting high pressure drop fluid loss agents RSTF-532, lubricating collapse-resisting agent for drilling fluid RS-1, fluid loss additive KJAN, sodium carbonate Na used by above-mentioned preparation method2CO3, sodium hydroxide NaOH, sodium chloride nacl, heat and salinity tolerance extreme-pressure lubricant HEP-1, drilling fluid heavy weight additive be on market sale product, strictly by industry standard or enterprise's mark inspection when purchasing, eligible could use.Specifically it is shown in Table 1.
1 elastic microsphere caving-preventing drilling fluid base stock detail list of table
The shale temperature resistance salt water drilling fluid that creeps into that the present invention provides has the following advantages compared with existing used shale drilling fluid system: 1. have stronger suppression shut-off capacity；2. cave-in is prevented；3. there is heat and salinity tolerance ability；4. environmental pollution is little, has good rheological characteristic etc..
Detailed description of the invention:
Below in conjunction with instantiation, the present invention is further illustrated
Example 1: a kind of compound method creeping into shale temperature resistance salt water drilling fluid.
Water temperature is risen to 65 DEG C by the tap water first measuring 1000 grams, adds the drilling fluid bentonite of 80 grams under low speed 600r/min electric stirring, stirs 10 minutes and adds 4 grams of Na2CO3It is stirred for 30 minutes, prehydration 24h under normal temperature and pressure；Under low speed 500r/min electric stirring, add 180 grams of NaCl again stir 10 minutes, add 20 grams of shale-control agent for drilling fluid FT103 to stir 10 minutes, add 10 grams of drilling fluids thickening fluid loss additive SRLS-Z3 to stir 5 minutes, add 5 grams of drilling fluids salt-resisting high-temperature-resisting high pressure drop fluid loss agents RSTF-532 to stir 10 minutes, add 10 grams of lubricating collapse-resisting agent for drilling fluid RS-1 to stir 10 minutes, add 4 grams of fluid loss additive KJAN to stir 5 minutes, be subsequently adding 15 grams of heat and salinity tolerance extreme-pressure lubricant HEP-1 and stir 10 minutes；Finally adding water with NaOH and be configured to the alkali liquor of mass percentage concentration 40%, system pH of adjustment is 9, stirs 1 hour, increases the weight of system density to 1.30g/cm with drilling fluid heavy weight additive barite3, prepare and originally creep into shale temperature resistance salt water drilling fluid.
Example 2: use XGRL-2 type roller heating stove that drilling fluid system of the present invention has been carried out rolling determination of recovery rates.
2, table creeps into shale temperature resistance salt water drilling fluid system and rolls response rate experimental result
Note: 1) red beds soil is four red beds soil landwaste, shale is appeared and is appeared for long 7 shale, is 6～10 mesh, and the response rate was the 40 mesh response rate；2) in table, result is 2 experimental data averages.
3, table creeps into shale temperature resistance salt water drilling fluid linear expansion experimental result
Note: 1) core is that drilling fluid bentonite (soil with slurry) is compressing；2) filtrate that filtrate extrudes after being system heat 105 DEG C/16h of rolling；3) in table, result is 2 experimental data averages.
Being tested from table 2, this rolling response rate creeping into shale temperature resistance salt water drilling fluid of table 3 and linear expansion rate, roll the response rate and reach more than 95%, 16h linear expansion rate only has 22.85% to have the preferably dispersion of suppression aquation and dilatancy.
Example 3: use the rolling of XGRL-2 type roller heating stove Continuous Heat, test this and creep into shale temperature resistance salt water drilling fluid thermal stability result.
4, table creeps into shale temperature resistance salt water drilling fluid Evaluation of Thermal Stability
5, table creeps into shale temperature resistance salt water drilling fluid temperature resistance merit rating
Understood system by the thermal stability results of table 4 to glue, cut with filter loss along with the increase of rolling time changes little, there is good heat stability.Understand this from the temperature resistance capacity experimental of table 5 to creep into shale temperature resistance salt water drilling fluid and can maintain rheological characteristic, HTHP dehydration under the conditions of 120 DEG C well, can temperature resistance 120 DEG C.
Claims (2)
1. creep into a shale temperature resistance salt water drilling fluid, it is characterized in that: prepare the raw materials used component of this drilling fluid and contain
Amount is, its mass unit is gram:
Adding water with sodium hydroxide and be made into the alkali liquor that mass percentage concentration is 40%, regulation system pH value is 9；Use drilling fluid heavy weight additive
Barite increases the weight of system density to 1.2-1.3g/cm3。
2. a compound method for drilling fluid as claimed in claim 1, is characterized in that: the tap water first measuring 900-1000 gram will
Water temperature rises to 65 DEG C, adds the drilling fluid bentonite of 40-80 gram, stir addition in 10 minutes under low speed 600r/min electric stirring
2-4 gram of Na2CO3It is stirred for 30 minutes, prehydration 24h under normal temperature and pressure；180-is added again under low speed 500r/min electric stirring
200 grams of NaCl stir 10 minutes, add 20-30 gram of shale-control agent for drilling fluid FT103 and stir 10 minutes, add 10-20 gram of brill
Well liquid thickening fluid loss additive SRLS-Z3 stirs 5 minutes, adds 3-5 gram of drilling fluid salt-resisting high-temperature-resisting high pressure drop fluid loss agents
RSTF-532 stirs 10 minutes, adds 10-25 gram of lubricating collapse-resisting agent for drilling fluid RS-1 and stirs 10 minutes, adds 2-4 gram of filtrate reducing
Agent KJAN stirs 5 minutes, is subsequently adding 10-15 gram of heat and salinity tolerance extreme-pressure lubricant HEP-1 and stirs 10 minutes；Finally use NaOH
Adding water and be configured to the alkali liquor of mass percentage concentration 40%, system pH of adjustment is 9, stirs 1 hour, with drilling fluid heavy weight additive weight crystalline substance
Stone increases the weight of system density to 1.30g/cm3, prepare and originally creep into shale temperature resistance salt water drilling fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610247841.1A CN105838344A (en) | 2016-04-20 | 2016-04-20 | High-temperature-resistance salt water drilling fluid for drilling shale |
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| CN201610247841.1A CN105838344A (en) | 2016-04-20 | 2016-04-20 | High-temperature-resistance salt water drilling fluid for drilling shale |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106433582A (en) * | 2016-08-28 | 2017-02-22 | 中石化中原石油工程有限公司西南钻井分公司 | KPF high-performance water-base drilling fluid |
| CN107118750A (en) * | 2017-06-20 | 2017-09-01 | 西南石油大学 | A kind of deep-well anti-high temperature anti-saturation salt water high-density water-based drilling fluid and preparation method thereof |
| CN109021940A (en) * | 2018-07-25 | 2018-12-18 | 新疆安东石油技术服务有限责任公司 | High-temperature high-density high-performance environment-friendly water-base drilling fluid and preparation method thereof |
| CN109370548A (en) * | 2018-12-10 | 2019-02-22 | 新疆安东石油技术服务有限责任公司 | One kind environment protection water-based drilling fluid resistant to high temperatures and preparation method thereof |
| CN113337256A (en) * | 2021-05-24 | 2021-09-03 | 西南石油大学 | Preparation method of high-temperature-resistant high-performance water-based drilling fluid capable of replacing oil with water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102851011A (en) * | 2011-06-30 | 2013-01-02 | 长江大学 | Polymer drilling fluid with high temperature resistance |
| CN104559967A (en) * | 2013-10-27 | 2015-04-29 | 中国石油化工集团公司 | Superhigh-density high-temperature-resistant saturated salt-water drilling fluid and preparation method thereof |
| CN104650830A (en) * | 2013-11-25 | 2015-05-27 | 中国石油化工集团公司 | High-temperature resistant high-density organic salt drilling fluid |
-
2016
- 2016-04-20 CN CN201610247841.1A patent/CN105838344A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851011A (en) * | 2011-06-30 | 2013-01-02 | 长江大学 | Polymer drilling fluid with high temperature resistance |
| CN104559967A (en) * | 2013-10-27 | 2015-04-29 | 中国石油化工集团公司 | Superhigh-density high-temperature-resistant saturated salt-water drilling fluid and preparation method thereof |
| CN104650830A (en) * | 2013-11-25 | 2015-05-27 | 中国石油化工集团公司 | High-temperature resistant high-density organic salt drilling fluid |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106433582A (en) * | 2016-08-28 | 2017-02-22 | 中石化中原石油工程有限公司西南钻井分公司 | KPF high-performance water-base drilling fluid |
| CN107118750A (en) * | 2017-06-20 | 2017-09-01 | 西南石油大学 | A kind of deep-well anti-high temperature anti-saturation salt water high-density water-based drilling fluid and preparation method thereof |
| CN109021940A (en) * | 2018-07-25 | 2018-12-18 | 新疆安东石油技术服务有限责任公司 | High-temperature high-density high-performance environment-friendly water-base drilling fluid and preparation method thereof |
| CN109021940B (en) * | 2018-07-25 | 2023-04-25 | 新疆安东石油技术服务有限责任公司 | High-temperature high-density high-performance environment-friendly water-based drilling fluid and preparation method thereof |
| CN109370548A (en) * | 2018-12-10 | 2019-02-22 | 新疆安东石油技术服务有限责任公司 | One kind environment protection water-based drilling fluid resistant to high temperatures and preparation method thereof |
| CN113337256A (en) * | 2021-05-24 | 2021-09-03 | 西南石油大学 | Preparation method of high-temperature-resistant high-performance water-based drilling fluid capable of replacing oil with water |
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Application publication date: 20160810 |
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