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Strong inhibition type anti-collapse foam liquid for drilling

A strong suppression and foam fluid technology, applied in the field of foam fluid for drilling, can solve the problems of well wall instability and failure to effectively protect the well wall

Inactive Publication Date: 2010-08-11
CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary foam cannot effectively protect the well wall during drilling, and it is easy to cause the well wall to become unstable. For the upper mudstone formation, under the condition of uneven stress on the well wall, foam may cause collapse due to hydration. Therefore, it is necessary to Provide a strong anti-collapse foam fluid to effectively protect the well wall

Method used

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  • Strong inhibition type anti-collapse foam liquid for drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A strong anti-collapse foam solution for well drilling is prepared by the following formula:

[0012] 0.1 kg of foam stabilizer is specifically: the molecular formula is [C 6 h 7 o 2 (OH) 2 CH 2 COONa] n Wherein the high-viscosity carboxymethyl cellulose of n=6 million is 0.05 kilogram and molecular formula is (C 35 h 49 o 29 ) n Wherein n=1.6 million xanthan gum XCD is 0.05 kg;

[0013] 0.4 kg of foaming agent is specifically: 0.15 kg of sodium lauryl sulfate K-12, 0.15 kg of fatty alcohol polyoxyethylene ether sodium sulfate AES, 0.05 kg of polyethylene glycol octylphenyl ether OP-10, Trade name is 0.05 kilograms of the tensio-active agent of blowing agent SW-1;

[0014] 2.6 kilograms of anti-slump agents are specifically: 0.3 kilograms of secondary organic cation forming agents whose trade name is anti-slump agent CSJ-1, 0.3 kilograms of mud shale inhibitors whose trade name is mud shale inhibitor cation I, chlorinated Potassium KCL is 2 kg;

[0015] 3 ki...

Embodiment 2

[0019] A strong anti-collapse foam solution for well drilling is prepared by the following formula:

[0020] 0.09 kg of foam stabilizer is specifically: the molecular formula is [C 6 h 7 o 2 (OH) 2 CH 2 COONa] n Wherein the high viscosity carboxymethyl cellulose of n=5,000,000 is 0.045 kilogram and molecular formula is (C 35 h 49 o 29 ) n Wherein n=1.5 million xanthan gum is 0.045 kg;

[0021] 0.36 kg of foaming agent is specifically: 0.135 kg of sodium lauryl sulfate K-12, 0.135 kg of fatty alcohol polyoxyethylene ether sodium sulfate AES, 0.045 kg of polyethylene glycol octylphenyl ether OP-10, Trade name is 0.045 kilograms of the tensio-active agent of blowing agent SW-1;

[0022] 2.34 kg of anti-slump agent is specifically: 0.27 kg of secondary organic cation forming agent whose trade name is anti-slump agent CSJ-1, 0.27 kg of mud shale inhibitor whose trade name is shale inhibitor cation I, chlorinated Potassium KCL is 1.8 kg;

[0023] 2.7 kg of fluid loss re...

Embodiment 3

[0026] A strong anti-collapse foam solution for well drilling is prepared by the following formula:

[0027] 0.11 kg of foam stabilizer is specifically: the molecular formula is [C 6 h 7 o 2 (OH) 2 CH 2 COONa] n Wherein the high-viscosity carboxymethyl cellulose of n=7 million is 0.055 kilogram and molecular formula is (C 35 h 49 o 29 ) n Wherein n=2 million xanthan gum XCD is 0.055 kg;

[0028] 0.44 kg of foaming agent is specifically: 0.165 kg of sodium lauryl sulfate K-12, 0.165 kg of fatty alcohol polyoxyethylene ether sodium sulfate AES, 0.055 kg of polyethylene glycol octylphenyl ether OP-10, Trade name is 0.055 kilograms of the tensio-active agent of blowing agent SW-1;

[0029]2.86 kg of anti-slump agent is specifically: 0.33 kg of secondary organic cation forming agent whose trade name is anti-slump agent CSJ-1, 0.33 kg of mud shale inhibitor whose trade name is shale inhibitor cation I, chlorinated Potassium KCL is 2.2 kg;

[0030] 3.3 kilograms of fluid ...

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Abstract

The invention relates to foam liquid for drilling, in particular to strong inhibition type anti-collapse foam liquid for drilling, which is characterized by being prepared with the following components in parts by weight: 0.09-0.11 part of foam stabilizer, 0.36-0.44 part of foaming agent, 2.34-2.86 parts of anti-collapse agent, 2.7-3.3 parts of fluid loss additive and 94.51-93.29 parts of water. When complex situations such as formation water occur to gas drilling, the foam liquid of the invention can effectively improve the rock carrying capacity and the water carrying capacity and simultaneously protect the stability of the upper well wall. Laboratory studies shown that the foam liquid has high foaming capacity, the foaming capacity is more than or equal to 500 percent, the half-life is moderate, and the foam liquid can be easily controlled and is conducive to drilling engineering construction.

Description

technical field [0001] The invention belongs to the foam liquid for well drilling, in particular to a foam liquid with strong inhibition and anti-collapse for well drilling. Background technique [0002] At present, in the process of underbalanced drilling, foam drilling can be adopted when the formation water yield is large. Foam drilling is to utilize the characteristics of strong water and rock carrying capacity of foam. However, ordinary foam cannot effectively protect the well wall during drilling, and it is easy to cause the well wall to become unstable. For the upper mudstone formation, under the condition of uneven stress on the well wall, foam may cause collapse due to hydration. Therefore, it is necessary to Provide a strong anti-slump foam to effectively protect the well wall. Contents of the invention [0003] The object of the present invention is to provide a strong suppression and anti-slump foam liquid for drilling. The upper stratum realizes safe and ra...

Claims

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Application Information

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IPC IPC(8): C09K8/38C09K8/03
Inventor 张建斌贾军喜王军闯蒋振伟王锐韩朝辉杨赟邓凯李新弟杨建荣陈莉刘克强
Owner CNPC SICHUAN GASOLINEEUM GEOPHYSICAL PROSPECTING ENG TECH RES INST
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