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Double-effect isolation liquid for oil-based mud cementing, and preparation method thereof

A technology of oil-based mud and spacer fluid, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of oil-based mud demulsification, etc., to promote penetration, enhance solubility and permeability, and good isolation effect of effect

Inactive Publication Date: 2015-10-07
成都欧美克石油科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a double-effect spacer fluid for oil-based mud cementing and its preparation method, apply surfactant and colloid theory, solve the problem of oil film flushing in oil-based mud cementing and Prevention of oil-based mud demulsification problems

Method used

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  • Double-effect isolation liquid for oil-based mud cementing, and preparation method thereof
  • Double-effect isolation liquid for oil-based mud cementing, and preparation method thereof
  • Double-effect isolation liquid for oil-based mud cementing, and preparation method thereof

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Embodiment 1

[0024] [Example 1] A double-effect spacer fluid for oil-based mud cementing provided by the present invention, with a density of 1.01g / cm 3 , it contains the following raw materials in parts by weight, 95 parts of clear water, 10 parts of flushing agent, 10 parts of filler, 1 part of retarder, 0.1 part of defoamer, and 1 part of release agent. The flushing agent is a phospholipid composite surfactant; the filler is an ultrafine particle material; the retarder is an AMPS polymer retarder; the defoamer is a polyether defoamer; the release agent is a polyethylene Organic polymer release agent.

[0025] A double-effect spacer fluid for oil-based mud cementing. Its preparation method is: add 1 part of spacer to 95 parts of clear water, stir well at low speed, then slowly add 10 parts of filler and 1 part of retarder After stirring evenly, add 10 parts of flushing agent and keep rotating at low speed. After the liquid is evenly distributed, finally add 0.1 part of defoamer, and kee...

Embodiment 2

[0026] [Example 2] A double-effect spacer fluid for oil-based mud cementing provided by the present invention, with a density of 1.25g / cm 3 , it contains the following raw materials in parts by weight, 100 parts of clear water, 12 parts of flushing agent, 12 parts of filler, 2 parts of retarder, 0.2 part of defoamer, 1.5 parts of release agent, and 38 parts of weighting agent. The flushing agent is a phospholipid composite surfactant; the filler is an ultrafine particle material; the retarder is an AMPS polymer retarder; the defoamer is a polyether defoamer; the release agent is a polyethylene The organic polymer release agent, the weighting agent is barite.

[0027] A double-effect spacer fluid for oil-based mud cementing. Its preparation method is: add 1.5 parts of spacer to 100 parts of clear water, stir well at low speed, then slowly add 12 parts of filler and 2 parts of retarder After the base liquid configuration is completed, add 38 parts of weighting agent, stir evenl...

Embodiment 3

[0028] [Example 3] A double-effect spacer fluid for oil-based mud cementing provided by the present invention, with a density of 1.50g / cm 3 , it contains the following raw materials in parts by weight, 100 parts of clear water, 12 parts of flushing agent, 10 parts of filler, 2 parts of retarder, 0.15 part of defoamer, 1.5 parts of release agent, and 85 parts of weighting agent. The flushing agent is a phospholipid composite surfactant; the filler is an ultrafine particle material; the retarder is an AMPS polymer retarder; the defoamer is a polyether defoamer; the release agent is a polyethylene Organic polymer release agent; weighting agent is iron ore powder.

[0029] A double-effect spacer fluid for oil-based mud cementing. Its preparation method is: add 1.5 parts of spacer to 100 parts of clear water, stir well at low speed, then slowly add 10 parts of filler, 2 parts of retarder After the base liquid is prepared, add 85 parts of weighting agent. After stirring evenly, add...

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Abstract

The present invention discloses a double-effect isolation liquid for oil-based mud cementing, and a preparation method thereof, wherein the raw materials comprise, by weight, 100 parts of clear water, 10-20 parts of a rinsing agent, 10-15 parts of a filler, 1-5 parts of a retarding agent, 0.1-0.2 part of an antifoaming agent, 0-260 parts of a weighting agent, and 1-2 parts of an isolation agent. The preparation method comprises: adding 1-2 parts of an isolation agent to 100 parts of clear water, completely and uniformly stirring at a low speed, slowly adding 15-20 parts of a filler and 1-5 parts of a retarding agent, adding a weighting agent according to a density requirement after the base liquid preparation is completed, uniformly stirring, adding 10-15 parts of a rinsing agent, maintaining low speed rotation, adding 0.1-0.2 part of an antifoaming agent after the liquid distribution is uniform, and continuously stirring for 1-2 h while maintaining the rotation speed. According to the present invention, with the double-effect isolation liquid for oil-based mud cementing, the lipophilic interface is converted into the hydrophilic interface, such that the pollution of the oil-based on the conventional cement slurry system is reduced, the bonding problem of the two interfaces is solved, the high quality cementing and the sealing fixing of the annulus interface are achieved, and the stability of the mud is ensured.

Description

technical field [0001] The invention relates to a double-effect spacer fluid for oil-based mud cementing and a preparation method thereof, and relates to the field of oilfield chemistry for oil and gas drilling and cementing techniques. Background technique [0002] At present, the development of spacer fluid technology in China is relatively slow. The research on spacer fluid system is mainly aimed at a certain block or oil field. The range of density control is small, the range of performance and application is narrow, and it cannot adapt to various well conditions and field use requirements. Applicability; and the adjustment ability and range of rheological properties do not meet the requirements of drilling fluid, cement slurry displacement mechanism and field application requirements. [0003] With the continuous development of unconventional oil and gas resources represented by shale gas, oil-based drilling fluids are widely used in shale gas drilling technology. It h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/40C09K8/524C09K8/528
CPCC09K8/40C09K8/524C09K8/528
Inventor 唐昌强刘东曹智
Owner 成都欧美克石油科技股份有限公司
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