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High dehydration solidification pressuring bearing plugging agent

A pressure-bearing plugging agent, high water loss technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor bridging and plugging pressure-bearing capacity, affecting the strength of filter cake, insufficient strength, etc. , to improve the pressure bearing capacity, reduce the mud leakage, and increase the strength.

Active Publication Date: 2014-11-19
ASTAR PETROTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Among the above plugging agents, the fiber material is paper dust fiber or asbestos fiber, polypropylene fiber, these fibers are acid-insoluble, and the strength is not enough, showing the contradiction between the acid solubility rate and the strength of the filter cake; a curable plugging agent In the agent, although acid-soluble material calcium carbonate is added, its material is not fully acid-soluble, which will affect the strength of the filter cake; in a high-water-loss solidification plugging agent for sealing cracks, although the amount of fiber is reduced, However, bridging materials are added, which means that when used alone, the bridging and plugging pressure bearing capacity is poor

Method used

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  • High dehydration solidification pressuring bearing plugging agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The components and mass ratio of the plugging agent: 60% inorganic mineral material, 10% fiber, 8% inorganic reinforcing agent, 20% curing agent, and 2% filter aid; the inorganic mineral material is ash calcium, and the fiber is water magnesium Stone fiber: aluminum silicate ceramic fiber cotton = 1:1, inorganic reinforcing agent is white aluminum slag, curing agent is gypsum: K 2 CO 3 : NaCL=1:2:0.5, the filter aid is active calcium silicate.

[0041] The product can be obtained after each component is mixed evenly, and the above product is subjected to the following tests:

[0042] 1. Filtration time

[0043] (1) Weigh 78g of the sample (accurate to 0.01g), add it into a high stirring cup filled with 260ml of water, stir at 11000rpm for 3min, and remove the high stirring cup.

[0044] (2) Stir the sample slurry evenly and pour it into a dry and clean medium-pressure filter cup, cover the filter cover tightly, and place a 250ml beaker at the outlet of the filter to ...

Embodiment 2

[0056] The components and mass ratio of the plugging agent: 65% of inorganic mineral material, 15% of fiber, 5% of inorganic reinforcing agent, 20% of curing agent; wherein the inorganic mineral material is lime calcium: active calcium silicate = 3:1, fiber It is brucite fiber, the inorganic reinforcing agent is white aluminum slag, and the curing agent is gypsum: K 2 CO 3 : NaCl=1:2:0.5.

[0057] The product can be obtained after each component is mixed evenly, and the above product is subjected to the following tests:

[0058] 1. Filtration time

[0059] (1) Weigh 78g of the sample (accurate to 0.01g), add it into a high stirring cup filled with 260ml of water, stir at 11000rpm for 3min, and remove the high stirring cup.

[0060] (2) Stir the sample slurry evenly and pour it into a dry and clean medium-pressure filter cup, cover the filter cover tightly, and place a 250ml beaker at the outlet of the filter to receive the filtrate.

[0061] (3) Adjust the gas source to 0....

Embodiment 3

[0072] The components and mass ratio of the plugging agent: 55% inorganic mineral material, 15% fiber, 10% inorganic reinforcing agent, 15% curing agent, and 5% filter aid; the inorganic mineral material is ash calcium, and the fiber is water magnesium Stone fiber: aluminum silicate ceramic fiber cotton = 1:1; inorganic reinforcing agent is white aluminum slag, curing agent is gypsum: K 2 CO 3 : NaCL=1:2:0.5, the filter aid is light calcium carbonate.

[0073] The product can be obtained after each component is mixed evenly, and the above product is subjected to the following tests:

[0074] 1. Filtration time

[0075] (1) Weigh 78g of the sample (accurate to 0.01g), add it into a high stirring cup filled with 260ml of water, stir at 11000rpm for 3min, and remove the high stirring cup.

[0076] (2) Stir the sample slurry evenly and pour it into a dry and clean medium-pressure filter cup, cover the filter cover tightly, and place a 250ml beaker at the outlet of the filter to...

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Abstract

The invention discloses a high dehydration solidification pressuring bearing plugging agent. The high dehydration solidification pressuring bearing plugging agent comprises, by mass, 45-65 of an inorganic mineral material, 10-20% of a fiber, 15-25% of a solidifying agent, 5-10% of an inorganic reinforcing agent and 0-8% of a filter aid. The adoption of the inorganic acid-soluble mineral and the fiber guarantees that all components are acid-soluble substances, and has no influences on the acid dissolution rate of the pressure bearing plugging agent and the strength of a filter cake; and the inorganic mineral fiber has strong tensile strength and toughness, so a leak layer can be effectively plugged by the high dehydration solidification pressuring bearing plugging agent without adding a bridging material, and the pressure bearing capability of stratums is improved.

Description

technical field [0001] The invention relates to a treatment agent for drilling fluid, in particular to a high water loss solidification pressure-bearing plugging agent. 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, the problem of lost circulation has seriously restricted the exploration and development process. However, it is difficult for traditional plugging once or twice It can be successfully plugged, which is often solved through repeated plugging, the success rate is extremely low, and the occurrence of lost circulation is caused by the poor pressure bearing capacity of the formation; in order to solve the lost circulation, improve the pressure bearing capacity of the formation, reduce In order to reduce the probability of lost circulation, thereby reducing economic losses, and promoting the pace of exploration an...

Claims

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Application Information

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IPC IPC(8): C09K8/467
CPCC09K8/467C09K2208/08
Inventor 申威金承平杨胜谢奇王泽东张超向小龙
Owner ASTAR PETROTECH
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