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Low-temperature micro-bubble drilling fluid foaming agent and application thereof

A drilling fluid and foaming agent technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor foaming ability, salt resistance, calcium resistance, etc., and achieve strong foaming effect and calcium resistance Strong ability and good compatibility

Active Publication Date: 2014-06-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Anionic foaming agent has strong foaming ability, but poor salt and calcium resistance; nonionic foaming agent has strong salt and calcium resistance, but poor foaming ability

Method used

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  • Low-temperature micro-bubble drilling fluid foaming agent and application thereof
  • Low-temperature micro-bubble drilling fluid foaming agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of the low-temperature micro-foam drilling fluid foaming agent of the present embodiment is as follows: in a container, two kinds of materials, dodecyl dimethyl amine oxide and α-alkenyl sodium sulfonate, are fully mixed according to the mass ratio of 1:1. Can. The appearance of this invention is light yellow liquid.

[0021] The performance of the low-temperature micro-foam drilling fluid foaming agent of this embodiment is tested, specifically as follows:

[0022] 1pH

[0023] Dip the microfoam drilling fluid foaming agent sample with a glass rod, drop it on the pH test paper, and measure the pH value, accurate to one digit.

[0024] 2 density

[0025] At room temperature, use a liquid density meter with a suitable range to weigh the foaming agent density.

[0026] 3 Foam quality and half-life

[0027] 3.1 Instrument

[0028] American WARING company 8010EG masher is a rotary instrument powered by an electric motor, with two speeds and mech...

Embodiment 2

[0046] The preparation method of the low-temperature micro-foam drilling fluid foaming agent of the present embodiment is as follows: fully mix the two kinds of substances of dodecyl dimethyl amine oxide and α-alkenyl sulfonate in a container at a mass ratio of 2:1. Can. The appearance of this invention is light yellow liquid.

[0047] The performance of the low-temperature micro-foam drilling fluid foaming agent of this embodiment is tested, specifically as follows:

[0048]1pH

[0049] Dip the foaming agent sample of the microbubble working solution with a glass rod, drop it on the pH test paper, and measure the pH value, accurate to one digit.

[0050] 2 density

[0051] At room temperature, use a liquid density meter with a suitable range to weigh the foaming agent density.

[0052] 3 Foam quality and half-life

[0053] 3.1 Instrument

[0054] American WARING company 8010EG masher is a rotary instrument powered by an electric motor, with two speeds and mechanical tim...

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Abstract

The invention relates to a low-temperature micro-bubble drilling fluid foaming agent and application thereof. The low-temperature micro-bubble drilling fluid foaming agent is prepared from dimethyldodecylamine oxide and sodium alpha-olefin sulfonate according to a mass ratio of (1 to 2): 1. The low-temperature micro-bubble drilling fluid foaming agent has a pH value of 7 to 9, density of 0.90 to 1.00g / cm<3>, foam quality great than or equal to 60% and a half-life period great than or equal to 3.0 minutes. Based on each 100g of water in the micro-bubble drilling fluid, a use amount of the low-temperature micro-bubble drilling fluid foaming agent is in a range of 0.1 to 0.4g. The low-temperature micro-bubble drilling fluid foaming agent has a low utilization amount and strong foaming effects, can effectively adjust micro-bubble drilling fluid density, has strong functions of resisting salts and calcium, good compatibleness with a common drilling fluid treatment agent, and is suitable for an environment having a temperature less than or equal to 120 DEG C.

Description

Technical field: [0001] The invention relates to a low-temperature micro-bubble (60-70um in diameter) drilling fluid foaming agent and application thereof, in particular to a low-temperature micro-bubble drilling fluid foaming agent suitable for a temperature environment of 120°C or less. Background technique: [0002] Drilling fluid is one of the necessary materials used to balance formation pressure and ensure safe and smooth drilling during drilling. During the drilling process, lost circulation is the phenomenon that a large amount of drilling fluid leaks into the formation when the formation pressure is lower than the fluid column pressure. Lost circulation will cause downhole accidents or complex situations, resulting in prolonged construction time, increased operating costs, and even the scrapping of drilled wells, resulting in serious waste of resources and huge economic losses. In 2003, the cost of leak plugging alone in the world was about 800 million U.S. dollars...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
Inventor 申瑞臣袁光杰夏焱郑力会班凡生庄晓谦董建辉
Owner BC P INC CHINA NAT PETROLEUM CORP
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