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Low-solid-phase and high-temperature-resistant foam drilling fluid and preparation method thereof

A technology of high temperature resistance and drilling fluid, which is applied in the field of oil field drilling fluid, can solve the problems of poor stability of foam drilling fluid, insufficient rock carrying capacity, and failure to meet the performance requirements of foam drilling fluid, etc., and achieve good foam stability and large adjustable range , the effect of reducing filtration loss

Inactive Publication Date: 2018-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the foam drilling fluid system mentioned in the existing literature and patents has a maximum temperature resistance of 200°C, a high solid content in the foam, and a bentonite content of up to 6%. The poor stability of the foam drilling fluid in the formation of 200 °C results in insufficient rock-carrying capacity, so it cannot meet the performance requirements of the foam drilling fluid for the construction of geothermal wells and low-pressure reservoirs with a temperature of 230 °C

Method used

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  • Low-solid-phase and high-temperature-resistant foam drilling fluid and preparation method thereof
  • Low-solid-phase and high-temperature-resistant foam drilling fluid and preparation method thereof
  • Low-solid-phase and high-temperature-resistant foam drilling fluid and preparation method thereof

Examples

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Embodiment 1

[0031] This embodiment provides a low-solid-phase high-temperature-resistant foam drilling fluid, which includes the following components:

[0032] 0.3 parts by weight of liquid film enhancer, 0.5 parts by weight of anti-temperature soil, 0.6 parts by weight of foaming agent, 0.6 parts by weight of foam stabilizer, 0.8 parts by weight of shale inhibitor, and 100 parts by weight of water.

[0033] The low-solid-phase high-temperature-resistant foam drilling fluid of this embodiment is prepared by the following method:

[0034] Preparation of base liquid: add 100 parts by weight of water to a high stirring cup at room temperature, slowly add 0.3 parts by weight of dodecyltrimethylammonium chloride, stir for 5 to 25 minutes to obtain a uniform solution, and continue to add 0.5 parts by weight of calcium After stirring for 3 hours, add 0.6 parts by weight of C12 alkyl ether, 0.6 parts by weight of sulfopolyacrylamide and 0.8 parts by weight of C10 alkyl-terminated amine polyether,...

Embodiment 2

[0040] This embodiment provides a low-solid-phase high-temperature-resistant foam drilling fluid, which includes the following components:

[0041] 0.5 parts by weight of liquid film strengthening agent, 0.5 parts by weight of anti-temperature soil, 0.5 parts by weight of foaming agent, 0.5 parts by weight of foam stabilizer, 1.0 parts by weight of shale inhibitor, and 100 parts by weight of water.

[0042] The low-solid-phase high-temperature-resistant foam drilling fluid of this embodiment is prepared by the following method:

[0043] Preparation of base liquid: add 100 parts by weight of water to a high stirring cup at room temperature, slowly add 0.5 parts by weight of dodecyltrimethylammonium bromide, stir for 5 to 25 minutes to obtain a uniform solution, and continue to add 0.5 parts by weight of concave-convex Stick powder, after stirring for 3 hours, add 0.5 parts by weight of C14 alkylammonium, 0.5 parts by weight of polyacrylamide and 1.0 parts by weight of polyethyl...

Embodiment 3

[0049] This embodiment provides a low-solid-phase high-temperature-resistant foam drilling fluid, which includes the following components:

[0050] 0.5 parts by weight of liquid film enhancer, 0.5 parts by weight of anti-temperature soil, 0.6 parts by weight of foaming agent, 0.6 parts by weight of foam stabilizer, 0.8 parts by weight of shale inhibitor, and 100 parts by weight of water.

[0051] The low-solid-phase high-temperature-resistant foam drilling fluid of this embodiment is prepared by the following method:

[0052] Preparation of base liquid: add 100 parts by weight of water to a high stirring cup at room temperature, slowly add 0.5 parts by weight of dodecyltrimethylammonium chloride, stir for 5 to 25 minutes to obtain a uniform solution, continue to add 0.5 parts by weight of Mongolian Destonening, after stirring for 3 hours, add 0.6 parts by weight of C12 alkylammonium, 0.6 parts by weight of polyacrylamide and 0.8 parts by weight of ethylene glycol, and stir for...

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Abstract

The invention relates to low-solid-phase and high-temperature-resistant foam drilling fluid and preparation method thereof in the technical field of oilfield drilling fluids. The high-temperature-resistant foam drilling fluid with low solid phase is prepared from the following components in parts by weight: 100 parts of water, 0.1-3.0 parts of a liquid film reinforcing agent, 0.1-5.0 parts of temperature-resistant soil, 0.1-3.0 parts of a foaming agent, 0.1-4.0 parts of a foam stabilizer and 0.1-5.0 parts of a shale inhibitor. A foaming base fluid is re-stirred highly and foamed after being aged at the high temperature of 230 DEG C, the foam drainage half-life is equal to or longer than 9 minutes, the defect of poor temperature resistance of the existing foam drilling fluid is overcome, and requirements of geothermal wells with the temperature reaching 230 DEG C and low-pressure reservoirs for temperature resistance of the foam drilling fluid are met basically.

Description

technical field [0001] The invention relates to the technical field of oil field drilling fluid, and more particularly, relates to a low-solid-phase high-temperature-resistant foam drilling fluid and a preparation method thereof. Background technique [0002] Foam drilling fluid is an underbalanced drilling technology, which has the characteristics of significantly increasing the rate of penetration, effectively slowing down the loss of drilling fluid filtrate to the reservoir, and causing little damage to the formation. It is suitable for the exploration and development of low-pressure oil and gas reservoirs and geothermal wells. The successful application of foam drilling fluid requires it to maintain a certain stability. In the process of exploration and development of high-temperature geothermal well resources, foam drilling fluid can no longer meet the demand for stability under high-temperature conditions, and the foaming ability is weakened after high-temperature aging...

Claims

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Application Information

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IPC IPC(8): C09K8/24
CPCC09K8/24
Inventor 董晓强林永学杨小华杨帆柴龙李涛
Owner CHINA PETROLEUM & CHEM CORP
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