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A multifunctional consolidation plugging agent for drilling fluid

A plugging agent and multi-functional technology, applied in the field of petroleum drilling engineering, can solve the problems of poor settlement stability, inconvenient use, low strength of solidified body, etc., and achieve the effect of moderate strength, convenient use and high settlement stability

Active Publication Date: 2022-03-01
ASTAR PETROTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an easy-to-use, high-settling stability, high acid-soluble rate, high consolidation strength, multiple solid A new type of leak plugging agent

Method used

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  • A multifunctional consolidation plugging agent for drilling fluid
  • A multifunctional consolidation plugging agent for drilling fluid
  • A multifunctional consolidation plugging agent for drilling fluid

Examples

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Effect test

Embodiment 1

[0031] A multifunctional consolidation plugging agent, its components and mass ratio are: 50% inorganic mineral material, 4% fiber, 20% curing agent, 10% filter aid, 5% retarder, 6% expansion agent, 5% dispersant; wherein the inorganic mineral material is mixed with 200 mesh ash calcium and 200 mesh active magnesium oxide in equal mass ratio. The lost circulation agent product can be obtained after all components are mixed uniformly.

Embodiment 2

[0033] A multifunctional consolidation plugging agent, its components and mass ratio are: 60% inorganic mineral material, 5% fiber, 15% curing agent, 5% filter aid, 3% retarder, 9% expansion agent, Dispersant 3%; wherein the inorganic mineral material is formed by mixing 200 mesh ash calcium and 200 mesh activated magnesium oxide according to the mass ratio of 0.5:1. The lost circulation agent product can be obtained after all components are mixed uniformly.

Embodiment 3

[0035] A multifunctional consolidation plugging agent, its components and mass ratio are: inorganic mineral material 45%, fiber 5%, curing agent 20%, filter aid 10%, retarder 5%, expansion agent 10%, Dispersant 5%; the ratio of inorganic mineral materials is as follows: lime calcium (200 mesh): active magnesium oxide (200 mesh) = 1:1. The lost circulation agent product can be obtained after all components are mixed uniformly.

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Abstract

The invention discloses a multifunctional consolidation plugging agent for drilling fluid, which comprises the following components in mass percentage: 45-60% of inorganic mineral materials, 4-5% of fibers, 15-20% of curing agent, and filter aids 5-10%, 3-5% retarder, 5-10% expansion agent, 3-5% dispersant; the inorganic mineral material is that the particle size is 200 mesh ash calcium and active magnesium oxide according to the weight ratio of 0.5: 1 or a 1:1 mix. The fiber is a brucite fiber with an aspect ratio of 10-50:1 and a diameter of 0.5-15um. The components are uniformly mixed to obtain a multifunctional consolidation plugging agent for drilling fluid. The lost circulation agent uses clean water or water-based drilling fluid as the base fluid to directly prepare the lost circulation slurry. It can adopt three construction methods: while drilling, high filtration loss, and overall consolidation; it is easy to use, no need to clean the tank and change the drilling tool assembly; and the settlement stability is high. If clean water is used as the base fluid, it can be directly aggravated to the required density. .

Description

technical field [0001] The invention relates to the technical field of petroleum drilling engineering, in particular to a multifunctional consolidation plugging agent for water-based drilling fluid. Background technique [0002] In the process of oil exploration and development, lost circulation is the most common complex phenomenon; with the increase of wells in complex blocks and ultra-deep wells, lost circulation has seriously restricted the exploration and development process. At present, after the leakage zone is drilled, the construction site generally uses bridging plugging agent, high water loss plugging agent, and cement slurry to carry out the plugging construction. The bridging plugging agent is popular on site because it is easy to use and can be prepared directly with well mud. However, due to its low pressure bearing capacity, the formed bridge plug is easily damaged, etc., resulting in a low plugging success rate and often requires multiple constructions. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/16C09K8/24C09K8/467
CPCC09K8/16C09K8/24C09K8/426C09K8/467C09K2208/08C09K2208/18
Inventor 申威高强黄旭东吉永忠谢奇李杨何亚聪申杨傲穹李婷
Owner ASTAR PETROTECH
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