Atomization foam drilling fluid

A drilling fluid and foam technology, applied in the field of drilling fluid, can solve problems such as mud ring sticking, well wall collapse, and well wall spalling, and achieve the effects of increasing ROP, strong pollution resistance, and reducing costs

Active Publication Date: 2013-01-02
DAQING PETROLEUM ADMINISTRATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an atomized foam drilling fluid, which successfully solves technical problems such as bit bagging, mud ring sticking, well wall spalling, and well wall collapse faced by gas drilling under the condition of water outflow from the formation. Overcomes an important bottleneck in the gas drilling process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] The present invention will be further described below in conjunction with examples:

[0008] The atomized foam drilling fluid system of the present invention has been successfully tested in 9 wells. Field experiments have been carried out in 6 wells including Xushen 24 and Chao 60-4 in Daqing Xujiaweizi area, with a success rate of 100 %. See the table below for specific applications:

[0009] Table 1

[0010] Application hashtag

Atomized foam well section (m)

Mechanical drilling speed (m 3 / h)

Xushen 24 Well

2980.00-3140.00

4.46

Xushen 232 Well

2946.92-3480.00

4.51

Xushen 212 Well

3038.00-3412.00

7.92

Xushen 42 Well

3549.07-3612.98

3.64

Xushen 43 Well

2884.00-3635.00

4.43

Xushen 31 Well

2648.45-3281.87

4.89

Towards 60-4

1500.00-1630.00

14.48

Fang 24-72

1500.00-1574.00

20.05

Yong 96-48

1505.00-1573.00

29.22

[0011] The atomized foam drilling fluid system has successfully solved the tec...

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PUM

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Abstract

The invention discloses an atomization foam drilling fluid. The drilling fluid comprises the following components by weight percent: 1.5-2.0% of high temperature resistant foaming agent, 1.0-1.5% of clay stabilizer, 0.05-0.1% of foam stabilizer, 1.5-2.0% of blocking anti-sloughing agent, 2.0-3.0% of high temperature resistant fluosilicic anti-sloughing agent, 0.5-1.0% of defoamer and the balance of water. The drilling fluid successfully solves the technical problems of bit bailing, bit sticking by mud ring, well wall spalling, well wall collapse and the like encountered by gas drilling under the condition of formation water production, and overcomes a significant bottleneck in the gas drilling process.

Description

Technical field: [0001] The invention relates to a drilling fluid in the field of oil field drilling, in particular to an atomized foam drilling fluid. Background technique: [0002] Underbalanced drilling technology has obvious effects on discovering and protecting oil and gas reservoirs, for efficient exploration and development, and increasing the drilling rate of deep wells. During the foam field test of Well Yi 51 in Jilin Oilfield, foam drilling technology can increase the ROP by 3 to 5 times. Atomized foam drilling technology is also a necessary supporting technology for gas drilling technology such as air, nitrogen, and oil extractor tail gas. Therefore, while the underbalanced technology continues to expand its application range, it is necessary to deal with the continuous development of the atomized foam underbalanced drilling fluid system. Make improvements. Foam drilling fluid drilling is widely used in Liaohe Oilfield and Shengli Oilfield. Dagang Oilfield got rid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/38C09K8/536
Inventor 何恕赵晓竹张坤任金萍梁勇周大宇宋涛
Owner DAQING PETROLEUM ADMINISTRATION
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