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A kind of environment-friendly anti-collapse drilling fluid and preparation method thereof

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

Active Publication Date: 2022-03-08
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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  • A kind of environment-friendly anti-collapse drilling fluid and preparation method thereof
  • A kind of environment-friendly anti-collapse drilling fluid and preparation method thereof
  • A kind of environment-friendly anti-collapse drilling fluid and preparation method thereof

Examples

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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] 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 Medium pressure dehydration, then sealed in aging tank at 150°C for 16 hours, cooled to ro...

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Abstract

The invention relates to an environment-friendly anti-slump drilling fluid in the field of petroleum drilling fluid and a preparation method thereof. The environment-friendly anti-slump drilling fluid includes the following components in parts by weight: 100 parts by weight of water; 2-6 parts by weight of sodium bentonite; 0.5-2 parts by weight of anti-slump starch; 0.3-0.8 parts by weight of high-temperature resistant modified starch 0.5-1 part by weight of polyanionic cellulose; 2-5 parts by weight of humic acid fluid loss reducer; 2-5 parts by weight of lignite resin; 0.2-0.5 parts by weight of sodium sulfite; calcium carbonate with a particle size of 40-70 microns 2-6 parts by weight; 5-10 parts by weight of calcium carbonate with a particle diameter of 10-30 microns. The environment-friendly anti-slump drilling fluid is an environment-friendly anti-slump drilling fluid system with environment-friendly anti-slump modified starch as the main agent. The drilling fluid prepared by the present invention is aged at 150°C / 16h for rheology and water loss resistance It can be applied in high temperature environment, and has good anti-slump performance and environmental protection, which can minimize environmental pollution and meet the safety, high-quality, fast and efficient requirements of drilling engineering.

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 Patents(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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