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Blending process of oil-gas exploration drilling waste water-based drilling fluid

A water-based drilling fluid and exploratory drilling technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problem of low temperature resistance, gypsum salt resistance and salt water pollution, insufficient water loss and wall building, and rheological properties Poor problems, to avoid downhole accidents and complex, easy maintenance and treatment, to prevent the effect of wall collapse

Inactive Publication Date: 2020-07-17
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still does not solve the technical problems such as poor rheology, lubricity, and stability, weak resistance to temperature, gypsum salt, and salt water pollution, and insufficient water loss and wall-building properties existing in the existing waste drilling fluid.

Method used

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  • Blending process of oil-gas exploration drilling waste water-based drilling fluid
  • Blending process of oil-gas exploration drilling waste water-based drilling fluid
  • Blending process of oil-gas exploration drilling waste water-based drilling fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0022] As a preferred embodiment of the present invention, it discloses a blending process of waste water-based drilling fluid for oil and gas exploration drilling, which is characterized in that it includes a step of treating waste water-based drilling fluid and a step of preparing glue; The waste water-based drilling fluid is treated to control the solid phase content and sand content in the waste water-based drilling fluid; the preparation step of the modified glue is: adding 0.5% potassium humate KHm to clear water in terms of mass percentage , 0.2% NaOH, 0.2% CaO, 0.5% zwitterionic polymer viscosity reducer CJ5-1, 0.5% plugging lubricant DHD, 1% sulfonated phenolic resin SMP-1 and 1% KCl; the rest is water; then The prepared reforming glue and the treated waste water-based drilling fluid are mixed at a ratio of 20-30:80-70 to complete the deployment of the waste water-based drilling fluid.

[0023] The described treatment of the waste water-based drilling fluid is to pass...

Embodiment 2

[0026]On the basis of Example 1, the preparation steps of the modified glue solution are: in terms of mass percentage, add 1% potassium humate KHm, 0.2% NaOH, 0.2% CaO, 0.5% zwitterionic polymer Adhesive CJ5-1, 0.5% blocking lubricant DHD, 1% sulfonated phenolic resin SMP-1 and 2% KCl; the rest is water.

Embodiment 3

[0028] On the basis of Example 1, the preparation steps of the modified glue solution are: in terms of mass percentage, add 1.5% potassium humate KHm, 0.2% NaOH, 0.2% CaO, 1% zwitterionic polymer Adhesive CJ5-1, 1% blocking lubricant DHD, 1% sulfonated phenolic resin SMP-1 and 2% KCl; the rest is water.

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Abstract

The invention discloses a blending process of an oil and gas exploration drilling waste water-based drilling fluid. The blending process comprises a step of treating the waste water-based drilling fluid and a step of preparing a modified glue solution; the process comprises the following steps: adding 0.5-2% of potassium humate KHm, 0.2% of NaOH, 0.2% of CaO, 0.5-1.0% of a zwitterionic polymer viscosity reducer CJ5-1, 0.5-1% of a plugging lubricant DHD, 1-2% of sulfonated phenolic resin SMP-1, 1-3% of KCl in percentage by mass into clear water, and the balance is clear water; and then mixing the prepared modified glue solution with the treated waste water-based drilling fluid according to the ratio of (20-30): (80-70) to finish blending of the waste water-based drilling fluid. By adoptingthe process method, the waste drilling fluid has good rheological property, relatively high lubricity, relatively good stability, relatively strong temperature resistance, paste salt resistance and saline water pollution resistance, and is easy to maintain and treat.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a process for preparing waste water-based drilling fluid from oil and gas exploration and drilling. Background technique [0002] As the blood in the oil and gas drilling process, drilling fluid is indispensable to ensure its normal operation. It can balance the formation pressure, carry and suspend cuttings, clean the bottom of the well, protect the well wall, cool and lubricate the drilling tool and transmit power etc. In order to ensure these effects, drilling fluid usually needs to add various organic and inorganic drilling fluid treatment agents, such as lignite, sulfonated tannin, carboxymethyl cellulose, potassium polyacrylate, partially hydrolyzed polyacrylamide, zwitterionic polymer , sulfonated phenolic resin, sulfomethyl derivatives of humic acid, sulfonated or emulsified asphalt, etc., as well as oils, alkalis, surfactants, thinners, etc., to ensure high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24C09K8/12
CPCC09K8/24C09K8/12C09K2208/12
Inventor 张坤周华安陈立荣罗宇峰邓宇蒋学彬李辉
Owner BC P INC CHINA NAT PETROLEUM CORP
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