Well wall reinforcing working solution and preparation method thereof

A technology of working fluid and well wall, applied in the field of well wall reinforcement working fluid and its preparation, can solve the problems of narrow safety density window, insufficient stability and pressure bearing capacity, etc., and achieve good drilling safety, good toughness, good The effect of compressive strength

Active Publication Date: 2021-02-05
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

[0005] The present invention provides a working fluid for well wall reinforcement and its preparation method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of existing cement slurry in the well. The problems of insufficient stability and pressure bearing capacity and narrow safe density window exist when the wall is reinforced

Method used

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  • Well wall reinforcing working solution and preparation method thereof

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Effect test

Embodiment 1

[0021] Embodiment 1: The well wall reinforcement working fluid, the raw materials are calculated in parts by weight, including 30 to 60 parts of resin material, 30 to 60 parts of curing agent, 5 to 10 parts of flexible material and 5 to 10 parts of weighting material , according to the following steps: the first step, at room temperature, add the required amount of resin material, under the condition of 0°C to 45°C, control the stirring speed from 600rpm to 1200rpm, add the required amount of curing agent to the resin material, stir After 2h to 5h, the first mixture is obtained; in the second step, under the condition of 0°C to 45°C, the stirring speed is controlled from 600rpm to 1200rpm, and the required amount of flexible material is added to the first mixture, and after stirring for 30min to 60min, the second mixture is obtained. The second mixture; the third step, under the condition of 0°C to 45°C, control the stirring speed from 600rpm to 1200rpm, add the required amount...

Embodiment 2

[0022] Embodiment 2: The well wall reinforcement working fluid, the raw materials are calculated in parts by weight, including 30 or 60 parts of resin material, 30 or 60 parts of curing agent, 5 or 10 parts of flexible material and 5 or 10 parts of weighting material , according to the following steps: the first step, at room temperature, add the required amount of resin material, under the condition of 0°C or 45°C, control the stirring speed at 600rpm or 1200rpm, add the required amount of curing agent into the resin material, stir After 2h or 5h, the first mixture is obtained; in the second step, at 0°C or 45°C, the stirring speed is controlled at 600rpm or 1200rpm, and the required amount of flexible material is added to the first mixture, and after stirring for 30min or 60min, the second mixture is obtained. The second mixture; the third step, at 0°C or 45°C, control the stirring speed at 600rpm or 1200rpm, add the required amount of weighting material to the second mixture...

Embodiment 3

[0025] Embodiment 3: As the optimization of the foregoing embodiment, the resin material is bisphenol A with a mass percentage concentration of 40% to 70%, and two of dioxirane and butanediol with a mass percentage concentration of 5% to 15%. more than one species. The resin material has strong compressive strength and toughness after being solidified and formed. As the main body of the well wall reinforcement working fluid of the present invention, it ensures that the well wall reinforcement working fluid has better compressive strength and toughness.

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Abstract

The invention relates to the technical field of petroleum drilling engineering, in particular to a well wall reinforcing working solution and a preparation method thereof. The well wall reinforcing working solution comprises a resin material, a curing agent, a flexible material and a weighting material, and the preparation method comprises the following steps that under the condition of 0-45 DEG C, controlling the stirring rotating speed to range from 600 rpm to 1200 rpm, tadding he resin material firstly, and then adding the curing agent into the resin material; stirring to obtain a first mixture, adding the flexible material into the first mixture, stirring to obtain a second mixture, adding a weighting material into the second mixture, and stirring to obtain the well wall reinforcing working solution. The obtained well wall reinforcing working solution has better drilling safety, better compressive strength, good toughness and well wall stability maintaining capacity, the safety density window of drilling fluid is greatly widened, and a guarantee is provided for rapid and safe drilling.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling engineering, and relates to a well wall reinforcement working fluid and a preparation method thereof. Background technique [0002] In oil drilling, wellbore stability is a worldwide problem. With the increase of my country's exploration efforts, technical problems such as drilling wellbore instability under narrow safe density (pressure) windows have become major technical problems of common concern to the drilling community. [0003] Well wall reinforcement working fluid is to seal and strengthen the unstable stratum that has been drilled after drilling through some unstable strata to ensure safe drilling in the next stage, so as to significantly improve the stability and pressure bearing capacity of the well wall. Thereby widening the safe density (pressure) window and reducing the difficulty of drilling in complex formations below. [0004] At present, the commonly used cement slu...

Claims

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Application Information

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IPC IPC(8): C09K8/48
CPCC09K8/48
Inventor 乔东宇宋朝晖段文广郑义平王伟罡胡国强刘顽李清红
Owner BC P INC CHINA NAT PETROLEUM CORP
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