High-dehydration curing plugging agent and preparation method thereof

A plugging agent, high water loss technology, applied in the field of geological exploration, to achieve the effect of reducing curing time, good toughness and low cost

Active Publication Date: 2015-04-08
JIANGXI PINGXIANG ANHUA BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the above existing technical problems, and provide a high water loss solidified plugging agent. After the formation, it can quickly lose water and form a solidified substance, and then seal the lost formation, which solves the problem of low compressive strength after plugging with general plugging agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The high water loss curing plugging agent in this embodiment includes the following components in parts by weight: 40 parts of fly ash, 60 parts of gypsum, 20 parts of sodium soil, 10 parts of paper fiber, 3 parts of sodium silicate, calcium chloride 6 parts, 1.6 parts of sodium hydroxide.

[0017] The plugging agent is prepared by the following method to complete the blockage of the leakage channel: after weighing each component according to the formula content, mechanically stir for half an hour to form a raw material; mix the raw material with water, add 45 kg of raw material per 100 kg of water, Stir mechanically for half an hour to form a paste slurry; press the paste slurry into the fractured formation in the hole through a water pump, and after about 30 minutes, it will lose water and form a filter cake to complete the blockage of the leakage channel, and the drilling can be resumed immediately after standing still for about 1 hour In addition, from the preparati...

Embodiment 2

[0019] The high water loss curing plugging agent in this embodiment includes the following components in parts by weight: 25 parts of fly ash, 70 parts of gypsum, 15 parts of sodium soil, 10 parts of paper fiber, 5 parts of sodium silicate, calcium chloride 10 parts, 3 parts of sodium hydroxide.

[0020] The plugging agent is prepared by the following method to complete the blockage of the leakage channel: after weighing each component according to the formula content, mechanically stir for half an hour to form a raw material; mix the raw material with water, add 55 kg of raw material per 100 kg of water, Stir mechanically for half an hour to form a paste-like slurry; press the paste-like slurry into the fractured formation in the hole through a water pump, and after about 30 minutes, it will lose water and form a filter cake to complete the blockage of the leakage channel, and it can be restored immediately after standing still for about 1 hour Drilling, from the preparation ...

Embodiment 3

[0022] The high water loss curing plugging agent in this embodiment includes the following components in parts by weight: 20 parts of fly ash, 70 parts of gypsum, 5 parts of sodium soil, 10 parts of paper fiber, 5 parts of sodium silicate, calcium chloride 5 parts, 4 parts of sodium hydroxide.

[0023] The plugging agent is prepared by the following method to complete the blockage of the lost channel: after weighing each component according to the formula content, mechanically stir for half an hour to form a raw material; mix the raw material with water, add 50 kg of raw material per 100 kg of water, Stir mechanically for half an hour to form a paste-like slurry; press the paste-like slurry into the fractured formation in the hole through a water pump, and after about 1 hour, it will lose water and form a filter cake to complete the blockage of the leakage channel, and it can be restored immediately after standing still for about 1 hour Drilling, from the preparation of raw ma...

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PUM

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Abstract

The invention provides a high-dehydration curing plugging agent. The high-dehydration curing plugging agent is characterized by comprising the following components in parts by weight: 25-70 parts of fly ash or coke ash or lime fly ash or coal cinder, 40-75 parts of gypsum, 10-25 parts of sodium soil or pottery clay or calcium soil, 10 parts of paper fiber or leather fiber, 3-6 parts of sodium silicate or magnesium silicate or aluminum silicate or silicon oxide, 5-15 parts of calcium chloride or lime or calcium carbonate and 1.6-6 parts of sodium hydroxide. The plugging agent is a novel plugging material, water is added into the plugging agent and stirred by virtue of a stirrer to obtain a mixture, the mixture is pumped into the leakage formation, the plugging agent is rapidly dehydrated to form a cured product and thus the leakage formation is plugged and the difficult problem that the compressive strength after the leakage formation is plugged by the general plugging agent is not high is solved.

Description

technical field [0001] The invention relates to the technical field of geological exploration, in particular to a high-water-loss solidified leak-stopping agent and a preparation method of the leak-stopping agent. Background technique [0002] Formation leakage is a very complicated situation in drilling. Slight leakage will lead to the interruption of drilling work. In severe cases, it will waste a lot of production time, manpower, material and financial resources. If it is not dealt with in time, it will also cause well collapse, blowout and Accidents such as pipe sticking may even lead to the scrapping of some or all well sections. This problem has always been a major technical problem that plagues geological exploration at home and abroad, and has not been completely resolved so far. [0003] In order to block the leakage layer, various plugging substances must be used to build a blocking partition wall in the leakage channel very close to the wellbore to block the flow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/42
CPCC04B28/182C04B2111/00724C09K8/426C04B18/08C04B14/10C04B16/02C04B22/062
Inventor 梅春萍徐恩泉
Owner JIANGXI PINGXIANG ANHUA BIOTECH
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