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A kind of high temperature resistant recyclable foam drilling fluid and preparation method thereof

A drilling fluid and high-temperature-resistant technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem that the drilling fluid cannot meet the high temperature environment above 200 ℃, and achieve strong inhibition and suspension ability, strong stability, Wide range of effects

Active Publication Date: 2019-03-19
BEIJING INST OF EXPLORATION ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the existing drilling fluid cannot meet the high temperature environment above 200°C, the present invention provides a high temperature resistant recyclable foam drilling fluid and its preparation method, which is suitable for the high temperature environment above 250°C

Method used

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  • A kind of high temperature resistant recyclable foam drilling fluid and preparation method thereof

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Effect test

Embodiment 1

[0029] This embodiment provides a high temperature resistant recyclable foam drilling fluid, including the following components:

[0030] Sodium-based bentonite, any commercially available sodium-based bentonite can be selected, such as: sodium-based bentonite supplied by Shandong Weifang Tiantong Sodium Soil Co., Ltd., sodium-based bentonite supplied by Chifeng Shengchuan Bentonite Co., Ltd., artificial Sodium soil. Bentonite produced by Chifeng Shengchuan Bentonite Co., Ltd. is preferably used in the present invention.

[0031] For sepiolite, any commercially available sepiolite can be selected, such as: sepiolite supplied by Hebei Hongli Sepiolite Cashmere Co., Ltd., sepiolite supplied by Xingyuan Sepiolite Development Co., Ltd., Neixiang County, Henan Province , Sepiolite supplied by Hunan Tianjie Sepiolite Co., Ltd., etc. The sepiolite produced by Hunan Tianjie Sepiolite Co., Ltd. is preferably used in the present invention.

[0032] High temperature fluid loss reducer...

Embodiment 2

[0043] A high-temperature-resistant recyclable foam drilling fluid provided in this embodiment includes the following components in parts by weight: 100 parts of water, 2 parts of sodium bentonite, 1 part of sepiolite, 2 parts of high-temperature dehydration agent and 1 part of high-temperature foaming agent, does not contain high-temperature tackifier and compound high-temperature foam stabilizer.

Embodiment 3

[0045] A high-temperature-resistant recyclable foam drilling fluid provided in this embodiment includes the following components in parts by weight: 100 parts of water, 6 parts of sodium bentonite, 3 parts of sepiolite, 10 parts of high-temperature dehydration agent, 2 parts of high temperature tackifier, 3 parts of high temperature foaming agent and 2 parts of composite high temperature foam stabilizer.

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Abstract

The invention discloses a high-temperature-resistant recyclable foam drilling fluid and a preparation method thereof. The foam drilling fluid comprises the following components in parts by weight: 100 parts of water, 2-6 parts of sodium bentonite, 1-3 parts of meerschaum, 2-10 parts of high-temperature water-loss control agent, 0-2 parts of high-temperature tackifier, 1-3 parts of high-temperature foaming agent and 0-2 parts of composite high-temperature foam stabilizer. The preparation method comprises the following steps: adding the sodium bentonite and meerschaum into water, sufficiently stirring, adding the other components, and stirring uniformly. The high-temperature-resistant recyclable foam drilling fluid has favorable inhibition capability and suspending power in the stratum with ultrahigh temperature, low porosity, low permeability and lower reservoir pressure coefficient, and is beneficial to maintaining the pore wall stability and carried detritus. The high-temperature-resistant recyclable foam drilling fluid is suitable for deep well / ultradeep well drilling, and also suitable for deep oil and gas exploration, high-temperature geothermal well drilling and hot dry rock drilling.

Description

technical field [0001] The invention relates to a high-temperature-resistant recyclable foam drilling fluid and a preparation method thereof, which are applicable to the technical fields of deep and ultra-deep well scientific drilling, deep oil and gas drilling, high-temperature geothermal and future hot dry rock drilling. Background technique [0002] Hot dry rock (HDR) is a high-temperature rock mass with a general temperature greater than 200°C and a buried depth of several kilometers. There is no fluid inside or only a small amount of underground fluid. It can be effectively used for geothermal power generation and comprehensive utilization, and is environmentally friendly and renewable. . Therefore, the exploration and development of hot dry rock can effectively alleviate the problems of energy shortage and environmental protection. [0003] In the process of developing hot dry rock, drilling fluid plays a vital role. The burial depth is nearly 1,000 meters, and the fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/38
CPCC09K8/38
Inventor 单文军陶士先谭现锋宋明春赵长亮李艳宁付帆李晓东纪卫军熊正强
Owner BEIJING INST OF EXPLORATION ENG
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