Multipurpose environment-friendly drilling fluid

A drilling fluid, multi-purpose technology, applied in drilling compositions, chemical instruments and methods, etc., to achieve the effects of green environmental protection cost, good rheological properties, and good temperature resistance

Active Publication Date: 2020-06-26
CNPC BOHAI DRILLING ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially after the promulgation of the new environmental protection law in 2016, CNOOC has taken the lead in researching and applying the sulfonated, oil-free and environmentally friendly drilling fluid system. Western Drilling, Great Wall Drilling and other units are also stepping up research on environmentally friendly drilling fluid technology to meet their own needs, but At present, few water-based drilling fluids can meet the increasingly stringent environmental protection requirements and reduce the cost of drilling fluids, and can meet the safe and fast drilling requirements of complex wells and extended-reach directional wells and horizontal wells. In environmentally sensitive areas, Often the formation is severely muddy, and the drilling fluid needs to have a strong ability to inhibit muddying, so it is very important to develop new environmentally friendly drilling fluid technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of environment-friendly drilling fluid I, it is prepared by mixing the components of the following parts by weight:

[0023] 100 parts of water,

[0024] 6 parts bentonite,

[0025] 1 part of liquid ammonium salt NPAN produced by Shijiazhuang Hualai Dingsheng Company,

[0026] 1 part of low-viscosity polymer fluid loss reducer PANS produced by Shandong Deshunyuan Company,

[0027] 1 part of natural polymer fluid loss reducer NAT-20 produced by Beijing Peikang Company,

[0028] 1 part of white asphalt NFA-25 produced by Beijing Peikang Company,

[0029] 0.3 parts of biopolymer IND30 produced by Beijing Peikang Company,

[0030] 1 part of alcohol hydrocarbon ester complex agent DRF produced by Langfang Qingxing Chemical Co., Ltd., and

[0031] 2 parts of calcium with a particle size of 400 to 800 meshes.

[0032] The preparation method of the environment-friendly drilling fluid I is as follows: after adding bentonite to clear water to prepare bentonite slurry...

Embodiment 2

[0039] A kind of environment-friendly drilling fluid II, which is prepared by mixing the following components by weight:

[0040] 100 parts of water,

[0041] 4 parts bentonite,

[0042] 1 part of liquid ammonium salt NPAN produced by Shijiazhuang Hualai Dingsheng Company,

[0043] 1 part of low-viscosity polymer fluid loss reducer PANS produced by Shandong Deshunyuan Company,

[0044] 1 part of natural polymer fluid loss reducer NAT-20 produced by Beijing Peikang Company,

[0045] 1 part of white asphalt NFA-25 produced by Beijing Peikang Company,

[0046] 2 parts of nano polyester NP-1 produced by Shandong Deshunyuan Company,

[0047] 0.3 parts of biopolymer IND30 produced by Beijing Peikang Company,

[0048] 1 part of pentapolymer FCF-150 produced by Shandong Luhai Company,

[0049] 1 part of alcohol hydrocarbon ester complex agent DRF produced by Langfang Qingxing Chemical Co., Ltd., and

[0050] 2 parts of calcium with a particle size of 500 to 2000 mesh.

[0051] T...

Embodiment 3

[0059] A kind of environment-friendly drilling fluid III, which is prepared by mixing the following components by weight:

[0060] 100 parts of water,

[0061] 4 parts bentonite,

[0062] 1 part of liquid ammonium salt NPAN produced by Shijiazhuang Hualai Dingsheng Company,

[0063] 1 part of low-viscosity polymer fluid loss reducer PANS produced by Shandong Deshunyuan Company,

[0064] 1 part of natural polymer fluid loss reducer NAT-20 produced by Beijing Peikang Company,

[0065] 1 part of white asphalt NFA-25 produced by Beijing Peikang Company,

[0066] 2 parts of nano polyester NP-1 produced by Shandong Deshunyuan Company,

[0067] 1 part of bionic wall-fixing agent produced by Shida Bocheng Company,

[0068] 0.3 parts of biopolymer IND30 produced by Beijing Peikang Company,

[0069] 1 part of alcohol hydrocarbon ester complex agent DRF produced by Langfang Qingxing Chemical Co., Ltd.,

[0070] 2 parts of bio-oil HLR-3 produced by Shijiazhuang Hualai Dingsheng Com...

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Abstract

The invention discloses a multipurpose environment-friendly drilling fluid which comprises the following components in parts by weight: 100 parts of clear water, 2-8 parts of bentonite, 3-4 parts of afiltrate reducer, 1-4 parts of an anti-collapse agent, 0.3-1.3 parts of a shear strength improving agent, 1-3 parts of a lubricant and 2 parts of an oil reservoir protection temporary plugging agent,and all the components are purchased from commercially available products and are matched to meet corresponding requirements. The multipurpose environment-friendly drilling fluid is very low in medium-pressure water loss and high-temperature and high-pressure water loss control; the sulfonated drilling fluid is good in rheological property, proper in viscous shear and good in temperature resistance, has the advantages of being environmentally friendly and low in cost compared with traditional sulfonated drilling fluid, and can meet the safe and quick drilling requirements of conventional directional wells, high-density complex wells, large-displacement directional wells and horizontal wells through formula optimization.

Description

technical field [0001] The invention relates to the technical field of environmental protection drilling fluid, in particular to a multi-purpose environmental protection drilling fluid. Background technique [0002] With the increasing awareness of environmental protection in our country, the environmental protection of government departments is getting stronger and stronger. The impact of drilling fluid and cuttings on the environment has received more and more attention from government departments, and the environmental protection issues of the development of the petroleum industry have also received increasing attention. At present, our company's main construction areas are in environmentally sensitive areas such as North China, Jiangsu, and Sichuan, which have very high requirements for environmental protection, and there are hundreds of wells each year. Especially after the promulgation of the new environmental protection law in 2016, CNOOC has taken the lead in researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24
CPCC09K8/24
Inventor 史野夏景刚左洪国蒋立坤周志强杨锡田候建庆曹成
Owner CNPC BOHAI DRILLING ENG
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