Method for regulating and controlling performance of barite-weighted high-density water-based drilling fluid

A water-based drilling fluid and barite technology, applied in the field of drilling fluid, can solve the problems of poor wall-building properties, good wall-building properties, poor rheological properties, and difficulty in coordination and unification, and achieve high-temperature and high-pressure low filtration loss and easy rheological properties. Control, low fluid loss effect

Inactive Publication Date: 2019-07-23
SOUTHWEST PETROLEUM UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art, aiming at the problem that the rheology of the drilling fluid is good and the wall-building property is poor, or the rheology of the drilling fluid is good and the rheology is poor, the two are difficult to coordinate and unify, and provide a heavy Spar-weighted high-density water-based drilling fluid performance control method, suitable for high-density water-based drilling fluid systems in deep wells, ultra-deep wells or high-temperature, high-pressure, ultra-deep horizontal wells

Method used

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  • Method for regulating and controlling performance of barite-weighted high-density water-based drilling fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Sieve the barite powder with a grading sieve, collect the barite powder that passes through different apertures, and then compound the screened barite with barite of different particle sizes. The barite compounding method is shown in Table 1 :

[0032] Table 1

[0033] serial number Compound barite composition Proportion distribution of compound barite 1# 0.89μm barite 100％ 2# 0.89μm barite: API barite 1:4 3# 0.89μm barite: API barite 3:7 4# 0.89μm barite: 44μm~63μm barite 1:4 5# 0.89μm barite: 44μm~63μm barite 3:7

[0034] The experimental drilling fluid base slurry is composed of 5% sodium bentonite slurry, 0.3% potassium polyacrylate, 5% sulfonated phenolic resin, 5% sulfonated lignite resin, 5% sulfonated lignite, 30% NaCl and 1% asbestos.

[0035] The preparation method of described experimental drilling fluid comprises the following steps:

[0036] (1) Water and bentonite are mixed and reacted under stirring co...

Embodiment 2

[0042] According to the method of Example 1, the only difference is that the experimental drilling fluid density increased to 1.80g / cm 3 .

Embodiment 3

[0044] According to the method of Example 1, the only difference is that the experimental drilling fluid density increased to 2.00g / cm 3 .

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Abstract

The invention provides a method for regulating and controlling performance of barite-weighted high-density water-based drilling fluid, and belongs to the technical field of drilling fluid in petroleumand natural gas development processes. The invention provides the method for regulating and controlling rheological property and wall building property of the high-density water-based drilling fluidby calculating requirements of the rheological property and the wall building property of the high-density water-based drilling fluid for barite particle size gradation. A large number of segmented screening on the barite by using a grading sifter, the screened barite is compounded with the barite of different particle size sections, and experiments verify the correctness of the regulation and control method. The method of the invention is used to realize easy control of the rheological property and small high-temperature high-pressure filtration loss of the high-density drilling fluid and hasvery important guiding significance for field application.

Description

technical field [0001] The invention belongs to the technical field of drilling fluid in the process of oil and natural gas development, and in particular relates to a method for controlling the performance of barite-weighted high-density water-based drilling fluid. Background technique [0002] With the continuous development of oil drilling and development technology, the drilling depth is getting deeper and deeper, and many drilling depths are as deep as 7000m or more. The performance of high-density water-based drilling fluid is of great significance to the drilling success rate, drilling rate and construction cost of deep and ultra-deep wells. Therefore, high-density water-based drilling fluid technology has been studied as a major topic by various countries, and it is also recognized as an important indicator to measure the technical level of drilling fluids in various countries. During the drilling process, the high-density water-based drilling fluid has good rheolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24
CPCC09K8/24
Inventor 王平全罗显粱白杨罗平亚蒋官澄刘敬平龙海锋张昊程焱
Owner SOUTHWEST PETROLEUM UNIV
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