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Atomization foam drilling fluid

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

Active Publication Date: 2010-06-23
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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Effect test

Embodiment Construction

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

[0008] The atomized foam drilling fluid system of the present invention has been successfully tested on 9 wells, including 6 wells such as Xushen 24 and 3 underbalanced evaluation wells such as Chao 60-4 in the Xujiaweizi area of ​​Daqing. The success rate is 100% %. See the table below for specific applications:

[0009] Table 1

[0010] Apply hashtag

Atomized foam well section (m)

ROP (m 3 / h)

Well Xushen 24

2980.00-3140.00

4.46

Well Xushen 232

2946.92-3480.00

4.51

Well Xushen 212

3038.00-3412.00

7.92

Well Xushen 42

3549.07-3612.98

3.64

Well Xushen 43

2884.00-3635.00

4.43

Well Xushen 31

2648.45-3281.87

4.89

Towards 60-4

1500.00-1630.00

14.48

Fang 24-72

1500.00-1574.00

20.05

Win...

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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 layers, on efficient exploration and development, and on improving the ROP of deep wells. During the field test of foam in Well Yi51 in Jilin Oilfield, the foam drilling technology can increase the ROP by 3 to 5 times. At the same time, atomized foam drilling technology is a necessary supporting technology for air, nitrogen, oil extraction machine tail gas and other gas drilling technologies. Perfect. Foam drilling fluid drilling has been widely used in Liaohe Oilfield and Shengli Oilfield. Dagang Oilfield got rid of the constraints of foam drilling fluid drilling mostly targeting limestone formations, and conducted research on drilling technology targeting sandstone oil and gas layers. In early 20...

Claims

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Application Information

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Patent Type & Authority Applications(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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