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Environment-friendly anti-collapse drilling fluid and preparation method thereof

A drilling fluid and environmental protection technology, applied in the field of environmental protection and anti-slump drilling fluid and its preparation, can solve the problems of not providing temperature resistance data, not mentioning environmental protection performance, etc.

Active Publication Date: 2020-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-slump drilling fluid provided by the present invention has excellent anti-slump performance, but no temperature resistance data is provided, nor is environmental protection performance mentioned

Method used

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  • Environment-friendly anti-collapse drilling fluid and preparation method thereof
  • Environment-friendly anti-collapse drilling fluid and preparation method thereof
  • Environment-friendly anti-collapse drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] 1. Anti-slumping starch, prepared according to the preparation method of Example 3 in the Chinese patent application number 201811204630.5, specifically prepared by the method comprising the following steps:

[0054] (1) the cornstarch of 110g is dissolved in pure ethanol, is configured into weight concentration and is 22% cornstarch suspension, then 55g quaternary ammonium salt cationic agent 2,3-epoxypropyltrimethylammonium chloride and 9g alkaline catalyst sodium hydroxide is dissolved in the cornstarch suspension together, mixes evenly, obtains cornstarch slurry;

[0055] (2) 26g weight concentration is that more than 97% chloroacetic acid is dissolved in ethanol and is configured into the chloroacetic acid solution that weight concentration is 6%; 24g sodium hydroxide is dissolved in ethanol and is configured into the catalyst solution that weight concentration is 6%; Get step ( 1) Pour the prepared cornstarch slurry into a three-necked bottle, add 0.07g epichloroh...

Embodiment 1

[0062] Preparation of environmentally friendly anti-slump drilling fluid:

[0063] Formula: Calculated based on the amount added to 500g of water, add 20g of sodium bentonite, stir well and then cure at room temperature for 24 hours. Add 5g anti-collapse starch, 2.5g high temperature resistant modified starch SMART, 3.5g PAC-LV, stir well to dissolve the polymer, then add 15g humic acid fluid loss reducer, 15g lignite resin, 1.5g Na 2 SO 3 , 15g of calcium carbonate (40-70 microns), and 30g of calcium carbonate (10-30 microns) were stirred evenly to obtain final product.

[0064] Performance Testing:

[0065] According to the method in GB / T 16783.1-2014 "Petroleum and Natural Gas Industry Drilling Fluid Field Test Part 1: Water-based Drilling Fluid", the apparent viscosity, plastic viscosity, dynamic shear force and neutral After pressure loss, it is sealed in an aging tank and rolled at 150°C for 16 hours. After cooling to room temperature, the apparent viscosity, plastic ...

Embodiment 2

[0070] Preparation of environmentally friendly anti-slump drilling fluid:

[0071] Formula: Calculated based on the amount added in 500g of water, take 3 parts of 500g of water each, add 15g, 20g, and 25g of sodium bentonite respectively, stir well and then cure at room temperature for 24 hours. Add 5g anti-collapse starch, 2.5gSMART, 3.5gPAC-LV and stir well to dissolve the polymer, then add 15g humic acid fluid loss reducer, 15g lignite resin, 1.5gNa 2 SO 3 , 15g of calcium carbonate (40-70 microns), and 30g of calcium carbonate (10-30 microns) were stirred evenly to make three parts of environmental protection anti-slump drilling fluid.

[0072] Performance Testing:

[0073] The apparent viscosity, plastic viscosity, dynamic shear force and Medium-pressure dehydration, then sealed in aging tank at 150°C for 16 hours, cooled to room temperature and measured apparent viscosity, plastic viscosity, dynamic shear force, medium-pressure dehydration and 150°C high-temperature a...

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Abstract

The invention relates to an environment-friendly anti-collapse drilling fluid and a preparation method thereof, and belongs to the field of petroleum drilling fluids. The environment-friendly anti-collapse drilling fluid comprises the following components in parts by weight: 100 parts of water; 2-6 parts by weight of sodium bentonite; 0.5-2 parts by weight of anti-collapse starch; 0.3-0.8 part byweight of high temperature resistant modified starch; 0.5 to 1 part by weight of polyanionic cellulose; 2-5 parts by weight of a humic acid fluid loss agent; 2-5 parts by weight of lignite resin; 0.2to 0.5 part by weight of sodium sulfite; 2-6 parts by weight of calcium carbonate with a particle size of 40-70 microns; and 5-10 parts by weight of calcium carbonate with a particle size of 10-30 microns. The environment-friendly anti-collapse drilling fluid is an environment-friendly anti-collapse drilling fluid system taking environment-friendly anti-collapse modified starch as a main agent; and the provided drilling fluid has a good rheological property and a strong water loss resistant property after being aged at 150 DEG C for 16 hours, can be applied to a high-temperature environment, has a good anti-collapse performance and environmental protection performance, can maximally reduce environmental pollution, and meets the requirements of drilling engineering for safety, high quality,rapidness and high efficiency.

Description

technical field [0001] The invention relates to the field of drilling fluid in petroleum drilling, and more particularly relates to an environment-friendly anti-slump drilling fluid and a preparation method thereof. Background technique [0002] As Sinopec intensifies exploration efforts in complex deep well areas such as those that are sensitive to the environment, the demand for drilling fluids that are environmentally friendly, collapse-proof, and high-temperature resistant is increasing. Among several major foreign service companies in recent years, Scomi has researched a drilling fluid called Opt-flo, which mainly uses organic salts to inhibit plugging and prevent collapse, and the application temperature is 130°C; in addition, Halliburton’s Baroid has developed A kind of N-Drilling drilling fluid, which is mainly composed of polymer coating materials. The system is equipped with inorganic salts to inhibit and prevent collapse. The plugging and anti-slump performance o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24C09K8/035C09K8/03C09K8/467
CPCC09K8/24C09K8/035C09K8/032C09K8/426C09K8/467C09K2208/18C09K2208/12
Inventor 祁尚义杨枝王治法李胜徐江褚奇孔勇杨帆
Owner CHINA PETROLEUM & CHEM CORP
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