CN106367044B - Salt-tolerant plant cell-imitated anti-collapse drilling fluid - Google Patents
Salt-tolerant plant cell-imitated anti-collapse drilling fluid Download PDFInfo
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- CN106367044B CN106367044B CN201610667350.2A CN201610667350A CN106367044B CN 106367044 B CN106367044 B CN 106367044B CN 201610667350 A CN201610667350 A CN 201610667350A CN 106367044 B CN106367044 B CN 106367044B
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- drilling fluid
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- based drilling
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- sloughing
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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
Abstract
The invention relates to the technical field of petroleum drilling engineering, in particular to a salt-tolerant plant cell-imitated anti-sloughing drilling fluid, which overcomes the defects of high cost, strong corrosion, environmental pollution and the like of the existing drilling fluid and meets the requirements of well wall stability, environmental protection and the like. A salt-tolerant plant cell-imitated anti-sloughing drilling fluid comprises the following components in percentage by weight: 0.01-0.1% of soda ash, 0.01-0.3% of caustic soda, 0-15% of bentonite, 0-15% of modified starch, 0-5% of biopolymer, 0.1-15% of amino acid and derivatives thereof, 0.1-15% of saccharides, 0.1-15% of micromolecular polyhydric alcohol and the balance of water.
Description
Technical Field
The invention relates to the technical field of petroleum drilling engineering, in particular to a salt-tolerant plant cell-imitated anti-collapse drilling fluid.
Background
With the continuous widening of petroleum exploration and development areas, the drilling operations of deep wells and ultra-deep wells are gradually increased, and the deep wells and the ultra-deep wells have the outstanding characteristics that the downhole temperature and pressure are high, the performance of drilling fluid can be greatly changed, and some downhole complex conditions are easily caused. In recent years, a great deal of research work is carried out on the overall requirements of well wall stability, reservoir stratum, environmental protection and the like on the drilling fluid, particularly, the drilling fluid technology suitable for deep wells, ultra-deep wells and complex sections is greatly developed, and a series of novel drilling fluid systems are developed, such as an environment-friendly water-based drilling fluid system, a polyalcohol (polyalcohol) synergistic drilling fluid system, an alkyl glucoside drilling fluid system, a formate drilling fluid system, a novel silicate drilling fluid system, a synthetic-based drilling fluid system easy to biodegrade, a reversible emulsified water-in-oil drilling fluid system and the like. However, the inventor finds that the conventional drilling fluid improves the well wall stability, the oil reservoir protection and the environmental protection, but does not completely solve the problems in the production process. For example: the traditional water-based drilling fluid has lower cost and simple preparation, but is not beneficial to the stability of a well wall and can not meet the requirement of drilling of a deep well and an ultra-deep well; although the oil-based drilling fluid overcomes the defects of the water-based drilling fluid, the oil-based drilling fluid cannot be popularized and applied in a large quantity due to the reasons of environmental pollution, interference on logging, high cost and the like, and is only used in special stratum. The inhibition drilling fluid systems such as KCl polymer, cationic polymer, composite ionic polymer and mixed metal hydroxide well solve the problem of instability of shale; however, in a stratum where mud pages develop, the inhibitive performance of a composite ionic polymer, a mixed metal hydroxide and the like is insufficient, a KCl polymer drilling fluid is often used, the mineralization degree of the drilling fluid is high, certain difficulties are brought to the selection of a treating agent, the field maintenance of the drilling fluid, well logging explanation and the like, and the electrochemical corrosion of a downhole drilling tool is also aggravated; the cationic polymer drilling fluid treating agent has high price and poor compatibility with common treating agents, and has certain pollution to the environment.
Disclosure of Invention
The invention provides a salt-tolerant plant cell-imitated anti-sloughing drilling fluid, which overcomes the defects of high cost, strong corrosion, environmental pollution and the like of the existing drilling fluid and meets the requirements of well wall stability, environmental protection and the like.
In order to solve the technical problems, the invention adopts the following technical scheme:
a salt-tolerant plant cell-imitated anti-sloughing drilling fluid comprises the following components in percentage by weight:
0.01-0.1% of soda ash, 0.01-0.3% of caustic soda, 0-15% of bentonite, 0-15% of modified starch, 0-5% of biopolymer, 0.1-15% of amino acid and derivatives thereof, 0.1-15% of saccharides, 0.1-15% of micromolecular polyhydric alcohol and the balance of water.
Optionally, the salt-tolerant plant cell-simulated anti-sloughing drilling fluid further comprises a weighting material, a lubricant, a bactericide and a defoaming agent.
Preferably, the modified starch includes pregelatinized starch, sodium carboxymethyl starch, corn starch, waxy corn starch, and hydroxypropyl starch.
Preferably, the amino acid and its derivative include proline, glycine betaine, and alpha-amino acid.
Preferably, the sugar includes sucrose, trehalose, fructose, and glucose.
Preferably, the small-molecule polyol comprises glycerol, sorbitol, mannitol and xylitol.
On the other hand, the method for preparing the salt-tolerant plant cell-imitated anti-sloughing drilling fluid comprises the following steps:
(1) preparing the components according to the weight percentage of claim 1, adding soda ash and caustic soda into water, and fully stirring until the components are completely dissolved;
(2) sequentially adding bentonite powder, modified starch and biopolymer into the alkaline solution obtained in the step (1), and stirring and hydrating for at least 16 hours;
(3) and (3) sequentially adding amino acid and derivatives thereof, saccharides and micromolecular polyhydric alcohol into the mixed solution obtained in the step (2), and stirring for at least 1 hour to obtain the salt-tolerant plant cell collapse-preventing drilling fluid.
The invention provides a salt-tolerant plant cell-imitated anti-sloughing drilling fluid which is a water-based system and comprises main treating agents of amino acid and derivatives thereof, saccharides and micromolecule polyols besides water, alkalies, clay and weighting materials, and has the effects of balancing the osmotic pressure of the drilling fluid on a stratum, keeping the water content of the drilling fluid and reducing the hydration of the stratum.
Detailed Description
The first embodiment is as follows:
the components are prepared according to the following weight percentage: 0.01 percent of soda ash, 0.02 percent of caustic soda, 5 percent of bentonite, 0.5 percent of modified starch, 0.1 percent of amino acid and derivatives thereof, 0.1 percent of saccharides, 0.1 percent of micromolecular polyhydric alcohol and the balance of water, and the salt-tolerant plant cell-imitating anti-collapse drilling fluid (1) is obtained according to the preparation method.
And further rolling and aging the prepared salt-tolerant plant cell-imitated anti-collapse drilling fluid (1) for 16 hours at the temperature of 80 ℃, cooling to room temperature and testing the performance of the drilling fluid. Specifically, the density thereof is 1.01g/cm330s of funnel viscosity, 21/12/8/6/2/1 six-speed, 4/7 of initial and final cut, 9mPa & s of plastic viscosity, 1.5Pa of dynamic shear force, 7.8ml of API filtration loss and 1.87 of linear expansion coefficient of filtrate.
The method for measuring the linear expansion coefficient of the filtrate specifically comprises the following steps: using a linear dilatometer, 50g of dry evaluation soil was pressed under a pressure of 5MPa for 5 min. And (3) taking the salt-tolerant plant cell-imitated collapse-prevention drilling fluid (1), evaluating for 8 hours, and calculating the ratio of the final height to the original height to obtain the linear expansion coefficient.
In addition, according to the preparation requirement, a proper amount of weighting material, lubricant, bactericide, defoamer and other substances can be further added into the salt-tolerant plant cell-imitated anti-sloughing drilling fluid, and are not described herein.
Example two:
the components are prepared according to the following weight percentage: 0.01 percent of soda ash, 0.02 percent of caustic soda, 5 percent of bentonite, 0.5 percent of modified starch, 1.0 percent of amino acid and derivatives thereof, 0.1 percent of saccharides, 0.1 percent of micromolecular polyhydric alcohol, 0.01 percent of bactericide and the balance of water, and the salt-tolerant plant cell collapse-preventing drilling fluid (2) is obtained according to the preparation method.
Further rolling and aging the prepared salt-tolerant plant cell-imitated anti-collapse drilling fluid (2) for 16 hours at the temperature of 80 ℃, cooling to room temperature and testingIts performance. Specifically, the density thereof is 1.01g/cm331s of funnel viscosity, 24/13/9/6/2/1 six-speed, 3/7 of initial and final cut, 11mPa.s of plastic viscosity, 1Pa of dynamic cutting force, 3.8ml of API filtration loss and 1.81 of linear expansion coefficient of filtrate.
Example three:
the components are prepared according to the following weight percentage: 0.01 percent of soda ash, 0.02 percent of caustic soda, 5 percent of bentonite, 0.5 percent of modified starch, 1.0 percent of amino acid and derivatives thereof, 1.0 percent of saccharides, 0.1 percent of micromolecular polyhydric alcohol and the balance of water, and the salt-tolerant plant cell anti-collapse drilling fluid (3) is obtained according to the preparation method.
And further rolling and aging the prepared salt-tolerant plant cell-imitated anti-collapse drilling fluid (3) for 16 hours at the temperature of 80 ℃, cooling to room temperature and testing the performance of the drilling fluid. Specifically, the density thereof is 1.01g/cm3The viscosity of the funnel is 35s, the six-speed 28/16/9/6/2/1, the initial and final cut is 3/7, the plastic viscosity is 12mPa.s, the dynamic cutting force is 2Pa, the API filtration loss is 3.6ml, and the linear expansion coefficient of the filtrate is 1.65.
Example four:
the components are prepared according to the following weight percentage: 0.01 percent of soda ash, 0.02 percent of caustic soda, 5 percent of bentonite, 0.5 percent of modified starch, 1.0 percent of amino acid and derivatives thereof, 1.0 percent of saccharides, 1 percent of micromolecular polyhydric alcohol and the balance of water, and the salt-tolerant plant cell collapse-preventing drilling fluid (4) is obtained according to the preparation method.
And further rolling and aging the prepared salt-tolerant plant cell-imitated anti-collapse drilling fluid (4) for 16 hours at the temperature of 80 ℃, cooling to room temperature and testing the performance of the drilling fluid. Specifically, the density thereof is 1.01g/cm334s of funnel viscosity, 26/16/10/8/2/1 at six speeds, 2.5/7 of initial and final cut, 10mPa.s of plastic viscosity, 3Pa of dynamic shear force, 3.6ml of API filtration loss and 1.25 of linear expansion coefficient of filtrate.
Example five:
the components are prepared according to the following weight percentage: 0.01 percent of soda ash, 0.02 percent of caustic soda, 5 percent of modified starch, 0.5 percent of biopolymer, 1.0 percent of amino acid and derivatives thereof, 1.0 percent of saccharides, 1.0 percent of micromolecular polyhydric alcohol and the balance of water, and the salt-tolerant plant cell-imitating anti-sloughing drilling fluid (5) is obtained according to the preparation method.
Further will beThe prepared salt-tolerant plant cell-imitated anti-collapse drilling fluid (5) is aged for 16 hours in a rolling way at the temperature of 80 ℃, cooled to room temperature and tested for performance. Specifically, the density thereof is 1.01g/cm3The viscosity of the funnel is 40s, the six-speed 38/24/18/13/2/1 is obtained, the initial and final cut is 2.5/6, the plastic viscosity is 14mPa.s, the dynamic shear force is 5Pa, the API filtration loss is 4.6ml, and the linear expansion coefficient of the filtrate is 1.24.
Claims (6)
1. An anti-sloughing water-based drilling fluid is characterized by comprising the following components in percentage by weight:
0.01-0.1% of soda ash, 0.01-0.3% of caustic soda, 0-15% of bentonite, 0-15% of modified starch, 0-5% of biopolymer, 0.1-15% of amino acid and derivatives thereof, 0.1-15% of saccharides, 0.1-15% of small molecular polyol and the balance of water;
the amino acid and its derivatives include proline, glycine betaine, and alpha-amino acid.
2. The anti-collapse water-based drilling fluid as claimed in claim 1, wherein the anti-collapse water-based drilling fluid further comprises weighting materials, lubricants, bactericides and defoaming agents.
3. The anti-sloughing water-based drilling fluid of claim 1 wherein the modified starch comprises pregelatinized starch, sodium carboxymethyl starch, corn starch, waxy corn starch, hydroxypropyl starch.
4. The collapse preventing water-based drilling fluid as claimed in claim 1, wherein the sugar comprises sucrose, trehalose, fructose, glucose.
5. The anti-sloughing water-based drilling fluid of claim 1 wherein the small molecule polyol comprises glycerol, sorbitol, mannitol, xylitol.
6. A method for preparing an anti-sloughing water-based drilling fluid is characterized by comprising the following steps:
(1) preparing the components according to the weight percentage of claim 1, adding soda ash and caustic soda into water, and fully stirring until the components are completely dissolved;
(2) sequentially adding bentonite powder, modified starch and biopolymer into the alkaline solution obtained in the step (1), and stirring and hydrating for at least 16 hours;
(3) and (3) sequentially adding amino acid and derivatives thereof, saccharides and micromolecular polyhydric alcohol into the mixed solution obtained in the step (2), and stirring for at least 1 hour to obtain the anti-sloughing water-based drilling fluid.
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| CN201610667350.2A CN106367044B (en) | 2016-08-15 | 2016-08-15 | Salt-tolerant plant cell-imitated anti-collapse drilling fluid |
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| CN201610667350.2A CN106367044B (en) | 2016-08-15 | 2016-08-15 | Salt-tolerant plant cell-imitated anti-collapse drilling fluid |
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| CN106367044B true CN106367044B (en) | 2020-07-14 |
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| CN109609104B (en) * | 2018-12-24 | 2021-04-27 | 厦门志信化学有限公司 | Drilling fluid and application thereof |
| CN115537190A (en) * | 2021-06-29 | 2022-12-30 | 中国石油化工股份有限公司 | Drilling fluid and application thereof |
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| CN1989219A (en) * | 2004-07-22 | 2007-06-27 | 赫尔克里士公司 | Water-based drilling fluids |
| CN102220113A (en) * | 2010-04-16 | 2011-10-19 | 长江大学 | Solid phase-free drilling-in liquid |
| CN102234501A (en) * | 2010-04-27 | 2011-11-09 | 长江大学 | Ocean deepwater water-based constant-rheology drilling fluid |
| CN104194746A (en) * | 2014-08-27 | 2014-12-10 | 克拉玛依市金鑫科技有限公司 | Biodegradable drilling fluid |
| CN104388064A (en) * | 2014-10-31 | 2015-03-04 | 中国石油化工集团公司 | Calcium chloride-containing water-based drilling fluid |
| CN104789195A (en) * | 2015-02-06 | 2015-07-22 | 中国石油大学(北京) | Bionic shale inhibitor and preparation method thereof and drilling fluid and application thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040121917A1 (en) * | 2002-12-20 | 2004-06-24 | Pakulski Marek K | Synergistic mixtures containing an amino acid derivative and a method of using the same to foam brines |
| CA2595723C (en) * | 2005-10-14 | 2009-01-27 | Aquero Company, Llc | Amino acid, carbohydrate and acrylamide polymers useful as flocculants in agricultural and industrial settings |
| US9796490B2 (en) * | 2013-10-24 | 2017-10-24 | Schlumberger Technology Corporation | Aqueous solution and method for use thereof |
| US20170210968A1 (en) * | 2014-07-14 | 2017-07-27 | Amir MIRZAEI | Reservoir treatment fluid |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1989219A (en) * | 2004-07-22 | 2007-06-27 | 赫尔克里士公司 | Water-based drilling fluids |
| CN102220113A (en) * | 2010-04-16 | 2011-10-19 | 长江大学 | Solid phase-free drilling-in liquid |
| CN102234501A (en) * | 2010-04-27 | 2011-11-09 | 长江大学 | Ocean deepwater water-based constant-rheology drilling fluid |
| CN104194746A (en) * | 2014-08-27 | 2014-12-10 | 克拉玛依市金鑫科技有限公司 | Biodegradable drilling fluid |
| CN104388064A (en) * | 2014-10-31 | 2015-03-04 | 中国石油化工集团公司 | Calcium chloride-containing water-based drilling fluid |
| CN104789195A (en) * | 2015-02-06 | 2015-07-22 | 中国石油大学(北京) | Bionic shale inhibitor and preparation method thereof and drilling fluid and application thereof |
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Effective date of registration: 20210915 Address after: 100027 Chaoyangmen North Street, Chaoyang District, Chaoyang District, Beijing Patentee after: SINOPEC Group Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute Address before: 100101 Beichen West Road, Chaoyang District, Beijing 8 Beichen world center, block A 703. Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute |
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Effective date of registration: 20220831 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: SINOPEC Group Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee after: Drilling fluid technology service center of Sinopec Shengli Petroleum Engineering Co.,Ltd. Address before: 100027 Chaoyangmen North Street, Chaoyang District, Chaoyang District, Beijing Patentee before: SINOPEC Group Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute |
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