Stabilizer for drilling fluids and preparation method thereof

A stabilizer and drilling fluid technology, applied in the field of drilling, can solve the problems of complex formation pressure system, long open hole in deep well drilling, etc.

Active Publication Date: 2016-06-15
四川泓华油气田工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the open hole of deep well drilling is long, the formation pressure system is complicated, and there are many and complicated formations encountered during drilling.
At present, there is no good high-temperature stabilizer, how to improve the high-temperature resistance of the drilling fluid system is a major problem in drilling engineering

Method used

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  • Stabilizer for drilling fluids and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Get 25 parts by weight of sulfonated lignite resin, 50 parts by weight of sulfonated phenolic resin, 14 parts by weight of high-strength polypropylene fiber, 6 parts by weight of polyethylene glycol, 5 parts by weight of acetone oxime, in the reactor (double helix cone mixer , DSH model, 60 rev / min) and stirred for 1 hour, dried and packaged, the "stabilizer for drilling fluid" can be prepared. Then, under the conditions of fresh water and salt water, the fluid loss of the base slurry, the fluid loss of the base slurry after aging, the fluid loss of the sample slurry, and the fluid loss of the sample slurry after aging were measured. The results are shown in Table 2 below.

Embodiment 2

[0041] Get 25 parts by weight of sulfonated lignite resin, 50 parts by weight of sulfonated phenolic resin, 14 parts by weight of high-strength polypropylene fiber, 6 parts by weight of polyethylene glycol and 1 part by weight of acetone oxime, in the reactor (double helix conical mixer , DSH model, 60 rev / min) and stirred for 1 hour, dried and packaged, the "stabilizer for drilling fluid" can be prepared. Then, the same method as in Example 1 was used to measure the fluid loss of the base slurry, the fluid loss of the base slurry after aging, the fluid loss of the sample slurry, and the fluid loss of the sample slurry after aging. The results are shown in Table 2 below.

Embodiment 3

[0043] Get 25 parts by weight of sulfonated lignite resin, 50 parts by weight of sulfonated phenolic resin, 14 parts by weight of high-strength polypropylene fiber, 6 parts by weight of polyethylene glycol and 10 parts by weight of acetone oxime, in the reactor (double helix cone mixer , DSH model, 60 rev / min) and stirred for 1 hour, dried and packaged, the "stabilizer for drilling fluid" can be prepared. Then, the same method as in Example 1 was used to measure the fluid loss of the base slurry, the fluid loss of the base slurry after aging, the fluid loss of the sample slurry, and the fluid loss of the sample slurry after aging. The results are shown in Table 2 below.

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Abstract

The invention relates to a stabilizer for drilling fluids and a preparation method thereof. The stabilizer for drilling fluids comprises a sulfonated lignite resin, a sulfonated phenol formaldehyde resin, high-strength polypropylene fibers, polyethyleneglycol and acetoxime. The method comprises the following step: stirring and mixing the sulfonated lignite resin, sulfonated phenol formaldehyde resin, high-strength polypropylene fibers, polyethyleneglycol and acetoxime to obtain the stabilizer. The stabilizer for drilling fluids can well inhibit the degradation of the drilling fluid in the deep well under the conditions of high pressure, high sulfur content and high risk, thereby performing the high-temperature stabilizing function, and improving the rheological property of the drilling fluid system. The stabilizer for drilling fluids has lower water loss, and the water loss change rate before and after high temperature can be controlled within 30%.

Description

technical field [0001] The invention relates to drilling technology, especially shale gas drilling technology, more specifically, the invention relates to a stabilizer for drilling fluid and a preparation method thereof. Background technique [0002] With the rapid development of shale gas drilling technology, the technical difficulties faced by drilling fluids for deep wells and ultra-deep wells are becoming more and more prominent. Due to the complex geological conditions in my country, deep well drilling fluids are faced with the "three highs" of high temperature, high density and high salt, which will have a great impact on the rheology and water loss of drilling fluids. Many drilling fluid additives (polyacrylamide, sulfonated lignite, sulfonated phenolic resin, starch, CMC, etc.) that are not easy to change at low temperature may also change their performance under high temperature and high pressure. At the same time, the open hole of deep well drilling is long, the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/24
CPCC09K8/035C09K8/24C09K2208/08C09K2208/12
Inventor 刘乾忠刘勇
Owner 四川泓华油气田工程科技有限公司
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