An 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 uniform film formation, good filtration loss reduction, and the effect of satisfying the well wall

Active Publication Date: 2021-07-20
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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  • An organic-inorganic composite silicate high temperature resistant film-forming drilling fluid system
  • An organic-inorganic composite silicate high temperature resistant film-forming drilling fluid system
  • An organic-inorganic composite silicate high temperature resistant film-forming drilling fluid system

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 1: The organic-inorganic composite silicate high temperature resistant film-forming drilling fluid system in this example contains methyl silicate with a concentration of 0.2mol / L and silicate C with a concentration of 0.06mol / L, and is prepared by the following steps Obtained: Add weighed methyl silicate and silicate C into 300mL of distilled water, stir magnetically for 20min, put them into a high-temperature reactor with 40g of cuttings, react at 180°C for 16h, and dry Weigh its quality after treatment, and observe the filming phenomenon on the surface of cuttings, see figure 1 .

Embodiment 2

[0036] Example 2: The organic-inorganic composite silicate high temperature resistant film-forming drilling fluid system in this example contains 2% organosilane by mass fraction and 1% silicate D by mass fraction, and is prepared by the following steps: Add the weighed organosilane and silicate D into 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 it after drying , and observe the film formation phenomenon on the surface of cuttings, see figure 2 .

Embodiment 3

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

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Abstract

The invention discloses an organic-inorganic composite silicate high-temperature-resistant film-forming drilling fluid system, which belongs to the drilling fluid used in the technical field of geological resource exploration and development. The drilling fluid system is composed of the following raw materials: bentonite base slurry, viscosity increasing agent, fluid loss reducer, plugging agent, weighting agent, inorganic silicate and organic silicate, the amount of each raw material is based on the weight of the bentonite base slurry, and the mass fraction of the bentonite base slurry is 1% to 4%. The concentration of the organic silicate is 0.05mol / L-0.5mol / L, and the mass fraction of the inorganic silicate is 0.1%-5%. The organic-inorganic composite silicate high-temperature-resistant film-forming drilling fluid system proposed by the present invention improves the ability of the drilling fluid to inhibit and prevent collapse, better meets the needs of well wall stability and safe drilling, and achieves inhibition, plugging and chemical purpose of solidification.

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. Shale is a fine-grained sedimentary rock that can be said to be a rich source of oil and natural gas. The reservoir characteristics of shale are different from those of conventional natural gas reservoirs. The shale bedding structure is developed, and the mechanical properties are quite different from those of homogeneous strata. The degree and permeability are very low. In recent years, shale oil and gas exploration has made great progress, but there are many problems in the drilling process, such as wellbore instability and groun...

Claims

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Application Information

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Patent Type & Authority Patents(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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