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Organic-inorganic composite silicate high-temperature-resistant film-forming drilling fluid system

A composite silicate and organosilicate technology, applied in the field of drilling fluid, to achieve the effects of good film quality, good filtration loss reduction, and good plugging performance

Active Publication Date: 2019-05-10
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems existing in the existing drilling fluid system, and provide an organic-inorganic composite silicate high temperature resistant film-forming drilling fluid system, which can achieve the effect of inhibition and anti-collapse in high temperature environment

Method used

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  • Organic-inorganic composite silicate high-temperature-resistant film-forming drilling fluid system

Examples

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Effect test

Embodiment 1

[0035] Example 1: The organic-inorganic composite silicate high temperature film-forming drilling fluid system of this example contains methyl silicate with a concentration of 0.2 mol / L and silicate C with a concentration of 0.06 mol / L, and is prepared by the following steps. Obtained: Add the weighed methyl silicate and silicate C to 300 mL of distilled water, stir magnetically for 20 min, put them into a high-temperature reaction kettle with 40 g of cuttings, react at 180 °C for 16 h, and dry After treatment, weigh the mass and observe the film formation on the cuttings surface. See details for details. figure 1 .

Embodiment 2

[0036] Example 2: The organic-inorganic composite silicate high temperature film-forming drilling fluid system of this example, containing 2% organic silane and 1% silicate D by mass fraction, was prepared by the following steps: Add the weighed organosilane and silicate D to 300mL of distilled water, stir magnetically for 20min, put it into a high-temperature reaction kettle with 40g of cuttings, react at 180°C for 16h, and weigh the mass after drying. , and observe the film formation phenomenon on the surface of cuttings, see details figure 2 .

Embodiment 3

[0037] Example 3: The organic-inorganic composite silicate high temperature film-forming drilling fluid system of this example contains methyl silicate with a concentration of 0.2 mol / L and silicate C with a concentration of 0.06 mol / L, and is prepared by the following steps. Obtained: Add the weighed methyl silicate A and silicate C into 300 mL of distilled water, stir magnetically for 20 min, put them into a high-temperature reaction kettle with 40 g of cuttings, react at 220 °C for 16 h, and bake After dry treatment, weigh the mass and observe the film formation on the surface of the cuttings. For details, see image 3 .

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Abstract

The invention discloses an organic-inorganic composite silicate high-temperature-resistant film-forming drilling fluid system, relates to drilling fluid, and belongs to the technical field of geological resource exploration and development. The drilling fluid system comprises bentonite base slurry, thickening agents, filtrate reducers, blocking agents, weighting agents, inorganic silicate and organic silicate, the dosage of raw materials is calculated according the weight of the bentonite base slurry, the weight percent of the bentonite base slurry is 1%-4%, the concentration of the organic silicate is 0.05mol / L-0.5mol / L, and the weight percent of the inorganic silicate is 0.1%-5%. According to the organic-inorganic composite silicate high-temperature-resistant film-forming drilling fluidsystem, the inhibition and anti-collapse ability of the drilling fluid is improved, the requirements of borehole stability and safe drilling are more effectively met, and inhibition, blocking and chemical wall fixation are achieved.

Description

technical field [0001] The invention relates to a drilling fluid used in the technical field of geological resource exploration and development, in particular to an organic-inorganic composite silicate high temperature resistant film-forming drilling fluid system. Background technique [0002] At present, my country has entered a new stage of unconventional energy exploration and development, and shale oil and gas has become a research hotspot. Shales are fine-grained sedimentary rocks that are arguably a rich source of oil and natural gas. The reservoir properties of shale are different from those of conventional natural gas reservoirs. The shale has well-developed bedding structures, and its mechanical properties are quite different from those of homogeneous strata. degree and permeability are very low. In recent years, great progress has been made in shale oil and gas exploration, but there are many problems in the drilling process, such as the wellbore instability and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24
Inventor 郭明义李颖韩炜超谭现锋博坤曹品鲁
Owner JILIN UNIV
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