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High-temperature-resistant reinforced drilling and completion fluid and preparation method thereof

A technology of high temperature resistance, drilling and completion, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of loose foam system, leakage of foam network, poor temperature resistance of foam, etc., achieve good stability, slow down gas The effect of channeling and increasing internal friction

Active Publication Date: 2020-10-23
BEIJING DADE GUANGYUAN PETROLEUM TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the foam produced by the foam drilling fluid in the prior art has poor temperature resistance, the inside of the foam system is loose, the foam is uneven, and the amount of foam generated instantaneously is too large, and the amount of foam will decrease as time goes on, resulting in a foam network. missing problem

Method used

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  • High-temperature-resistant reinforced drilling and completion fluid and preparation method thereof
  • High-temperature-resistant reinforced drilling and completion fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The invention provides a high-temperature-resistant enhanced drilling and completion fluid, which includes the following raw materials in parts by weight: 100 parts of base slurry, 0.6 parts of sodium dodecylsulfonate, and 0.6 parts of fatty alcohol polyoxyethylene ether sodium sulfate , 0.02 parts of carbodiamide urea, 0.04 parts of sodium nitrite, 0.06 parts of hydrotalcite, 0.3 parts of hydrolyzed polyacrylamide, 1.8 parts of graft copolymer with corrosion acid as the skeleton and 0.8 parts of modified yellow Raw gum;

[0037] The base slurry is an aqueous solution dispersed with modified nano-silicon dioxide particles, wherein the mass fraction of the modified nano-silicon dioxide particles is 0.3%; the preparation method of the modified nano-silicon dioxide particles is: by weight parts , take 60 parts of ethanol and 1 part of deionized water, mix them and place them under an ultrasonic oscillator for 20 minutes, then add 2.5 parts of tetraethyl orthosilicate to th...

Embodiment 2

[0049] The invention provides a high-temperature-resistant enhanced drilling and completion fluid, which includes the following raw materials in parts by weight: 150 parts of base slurry, 0.8 parts of sodium dodecylsulfonate, and 0.8 parts of fatty alcohol polyoxyethylene ether sodium sulfate , 0.04 parts of carbodiamide urea, 0.08 parts of sodium nitrite, 0.1 parts of hydrotalcite, 2 parts of hydrolyzed polyacrylamide, 2.4 parts of graft copolymer with corrosion acid as the skeleton and 1.2 parts of modified yellow Raw gum;

[0050] The base slurry is an aqueous solution dispersed with modified nano-silicon dioxide particles, wherein the mass fraction of the modified nano-silicon dioxide particles is 0.3%; the preparation method of the modified nano-silicon dioxide particles is: by weight parts , take 60 parts of ethanol and 1 part of deionized water, mix them and place them under the ultrasonic oscillator for 30 minutes, then add 2.5 parts of tetraethyl orthosilicate to the ...

Embodiment 3

[0062] The invention provides a kind of high-temperature-resistant enhanced drilling and completion fluid, which includes the following raw materials in parts by weight: 130 parts of base slurry, 0.7 parts of sodium dodecylsulfonate, and 0.7 parts of fatty alcohol polyoxyethylene ether sodium sulfate , 0.03 parts of carbodiamide urea, 0.06 parts of sodium nitrite, 0.08 parts of hydrotalcite, 1.2 parts of hydrolyzed polyacrylamide, 2.1 parts of graft copolymers with corrosion acid as the skeleton and 1.0 parts of modified yellow Raw gum;

[0063] The base slurry is an aqueous solution dispersed with modified nano-silicon dioxide particles, wherein the mass fraction of the modified nano-silicon dioxide particles is 0.3%; the preparation method of the modified nano-silicon dioxide particles is: by weight parts , take 60 parts of ethanol and 1 part of deionized water, mix them and put them under the ultrasonic oscillator for 25 minutes, then add 2.5 parts of tetraethyl orthosilica...

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Abstract

The invention discloses a high-temperature-resistant reinforced drilling and completion fluid. The fluid comprises the following raw materials in parts by weight: 100 to 150 parts of base slurry; 0.6to 0.8 part of sodium dodecyl sulfate; 0.6 to 0.8 part of sodium polyoxyethylene alkyl ether sulphate, 0.02 to 0.04 part of carbamide, 0.04 to 0.08 part of sodium nitrite, 0.06 to 0.1 part of hydrotalcite, 0.3 to 2 parts of a foam stabilizer, 1.8 to 2.4 parts of a filtrate reducer and 0.8 to 1.2 parts of modified xanthan gum. The high-temperature-resistant reinforced drilling and completion fluidprovided by the invention has the advantages of strong foaming capacity, high temperature resistance and improvement of foam uniformity and stability.

Description

technical field [0001] The invention relates to the technical field of chemicals used for drilling wells in oil and gas production. More specifically, the present invention relates to a high-temperature-resistant enhanced drilling and completion fluid and a preparation method thereof. Background technique [0002] Oil and gas extraction is a technology to extract oil and natural gas buried in the underground layer. Drilling construction technology is mostly used, that is, the bottom layer is drilled into holes vertically from the ground, and the oil and natural gas in the ground are flushed out from the holes. In the process of drilling a hole, it is necessary to discharge the generated cuttings in time. In the prior art, the drilling fluid is pumped into the wellbore, and the drilling fluid carries the cuttings and discharges to the ground surface, thereby ensuring the continuation of drilling. Drilling fluid is the blood of drilling, also known as drilling flushing fluid....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/588C09K8/58C09K8/38C09K8/12C08B37/02
CPCC09K8/584C09K8/588C09K8/58C09K8/38C09K8/12C08B37/0033
Inventor 刘亚东陈亚宁何文捷谷团王炳刚
Owner BEIJING DADE GUANGYUAN PETROLEUM TECH SERVICE
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