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Water-based drilling fluid and preparation method and application thereof

A water-based drilling fluid and drilling fluid technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of insufficient emphasis on environmental protection, achieve environmental protection characteristics, good rheology, and meet the requirements of well wall stability Effect

Inactive Publication Date: 2017-10-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this regard, our country has formulated a series of comprehensive construction regulations, but the emphasis on environmental protection is slightly insufficient

Method used

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  • Water-based drilling fluid and preparation method and application thereof
  • Water-based drilling fluid and preparation method and application thereof
  • Water-based drilling fluid and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment 1 mainly reflects: (1) the preparation method of the water-based drilling fluid of the present embodiment; (2) the environmental protection evaluation of the water-based drilling fluid of the present embodiment; (3) the basic performance parameters of the water-based drilling fluid of the present embodiment (rheological parameters and fluid loss); (4) shale and the variation of expansion after the contact of the water-based drilling fluid of the present embodiment; (5) the lubricating performance of the water-based drilling fluid of the present embodiment; (6) the water-based drilling fluid of the present embodiment Examples Water Activity of Water-Based Drilling Fluids.

[0032] This example 1 provides a kind of water-based drilling fluid, calculated based on the amount added per 100mL of water, the mass parts of the above components are respectively: 1.5g of sodium bentonite, 1.5g of attapulgite, 0.6g of pure-bore, pure-bore-lv0.3g, carboxymethylcellul...

Embodiment 2

[0078] This embodiment 2 mainly reflects: (1) the environmental protection evaluation of the water-based drilling fluid in this embodiment; (2) the rheological parameters (apparent viscosity and plastic viscosity) changes of the water-based drilling fluid in this embodiment under high temperature and high pressure conditions Situation; (3) fluid loss performance analysis of the present embodiment water-based drilling fluid under high temperature and high pressure conditions;

[0079] This Example 2 provides a water-based drilling fluid, calculated based on the amount added per 100mL of water, the mass parts of the above components are: 1.5g of sodium bentonite, 1.5g of attapulgite, and 0.7g of pure-bore , pure-bore-lv0.4g, carboxymethylcellulose 0.25g, lignite resin 2.3g, sodium chloride 4g, sodium carbonate 0.23g.

[0080] Experimental equipment: GJD-B12K frequency conversion high-speed mixer.

[0081] Its preparation method is as follows:

[0082] (1) Firstly, according to...

Embodiment 3

[0115] This embodiment 3 mainly reflects: 1) the environmental protection evaluation of the water-based drilling fluid of this embodiment; (2) the change of rheological parameters (apparent viscosity and plastic viscosity) of the water-based drilling fluid of this embodiment under high temperature and high pressure conditions (3) The fluid loss performance analysis of the present embodiment water-based drilling fluid under high temperature and high pressure conditions;

[0116] This Example 3 provides a water-based drilling fluid, calculated based on the amount added per 100mL of water, the mass parts of the above components are: 1.5g of sodium bentonite, 1.5g of attapulgite, and 0.65g of pure-bore , pure-bore-lv0.35g, carboxymethylcellulose 0.23g, lignite resin 2.32g, sodium chloride 4g, sodium carbonate 0.21g.

[0117] Experimental equipment: GJD-B12K frequency conversion high-speed mixer.

[0118] Its preparation method is as follows:

[0119] (1) Firstly, according to th...

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Abstract

The invention provides a water-based drilling fluid and a preparation method and application thereof. The water-based drilling fluid comprises, by weight, 1.5 parts of sodium-based bentonite, 1.5 parts of attapulgite, 0.9-1.1 parts of environment-friendly additive, 0.2-0.25 part of tackifier, 2.1-2.3 parts of filtrate reducer, 4 parts of salt, 0.2-0.23 part of pH regulator and 100 parts of water. Compared with the prior art, the water-based drilling fluid has the advantages of environment friendliness and low cost, and the environment-friendly additive can be degraded biologically, so that environment-friendly characteristics of the drilling fluid are increased; the drilling fluid is relatively simple in formulation.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to a water-based drilling fluid and its preparation method and application. Background technique [0002] Oil-based drilling fluid is commonly used in shale drilling at home and abroad. Although it can better solve the problem of wellbore stability, it has problems such as high cost and environmental pollution. Therefore, the development of water-based drilling fluids for shale gas horizontal wells deserves attention, especially for environmental protection. my country's current stage of oil field development and industrial development of new oil fields have brought about tremendous changes in my country's oil resources. In this regard, our country has formulated a series of comprehensive construction regulations, but the emphasis on environmental protection is slightly insufficient. [0003] In the face of increasingly stringent environmental protection laws and the need to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03
CPCC09K8/03C09K2208/12
Inventor 杨现禹岳也尚振筱蔡记华蒋国盛
Owner PETROCHINA CO LTD
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