Formation fluid separation analysis and evaluation method

A formation fluid, separation and analysis technology, applied in earth-moving drilling, wellbore/well components, construction, etc., can solve the problems of less analysis components and unquantified degassing, achieve accurate and timely analysis and interpretation, and improve the interpretation coincidence rate. Effect

Active Publication Date: 2015-12-09
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

At present, the traditional non-power mechanical degassing device uses the power of the drilling fluid itself to act on the comb-shaped structure inside, so that the gas in the drilling fluid overflows and enters the gas analysis device under the action of the vacuum pump; while the power degasser uses Rotate the stirring equipment to improve the efficiency of gas removal; but there are problems of indeterminate degassing and few analytical components

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  • Formation fluid separation analysis and evaluation method

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[0023] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0024] See figure 1 , The formation fluid separation analysis and evaluation method of the present invention includes the following steps:

[0025] 1) Three-phase separation; first, a high-efficiency and low-resistance multi-tube cyclone separator is used as the pre-separation. After the formation fluid enters the cyclone device from the side in a tangential direction at a certain speed, it rotates according to the shape of the cyclone tube. As the fluid moves to the bottom, the gradually reduced diameter increases the angular velocity and centrifugal force of the fluid. Under the action of the centrifugal force, phase separation occurs. Gas, light particles or liquid gather in the center of the cylinder and move toward the top of the cyclone. It flows out from the top, and the heavy particles and liquid flow out through the bottom of the cone; then c...

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Abstract

The invention discloses a formation fluid separation analysis and evaluation method. The method includes the following steps of firstly, conducting three-phase separation; secondly, conducting hydrocarbon gas collection and analysis; thirdly, conducting debris data collection and analysis; fourthly, conducting comprehensive interpretation and evaluation. By means of the method, effective separation of hydrocarbon gas, drilling fluid and carried debris is achieved, and by conducting expansion analysis on components of the hydrocarbon gas, the drilling fluid and the carried debris, more accurate and timely analysis and interpretation are achieved, and the coincidence rate of interpretation conducted on hydrocarbon reservoir by logging is increased; rapid type recognition and comprehensive and quantitative evaluation of reservoir fluid are achieved, and foundation is provided for subsequent logging, testing, comprehensive researching and other exploration and development decisions.

Description

Technical field [0001] The invention relates to the field of petroleum geological prospecting and engineering data acquisition and processing, in particular to a formation fluid separation analysis and evaluation method. Background technique [0002] As an important technical means in the process of oil drilling and development, mud logging has been widely used. During the drilling process, real-time formation fluids return to the surface with the drilling fluid, carrying a large amount of reservoir oil and gas information. Real-time analysis and processing of formation fluids, accurate interpretation and evaluation are the main research goals of logging technology. To achieve this goal, many fluid logging technologies have been developed. Gas logging technology obtains the true oil and gas content information of the drilled rock formation by measuring and analyzing the hydrocarbon gas content of the drilling fluid returned to the surface. At present, the traditional non-power ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B21/01
Inventor 孙合辉陶青龙李邓玥李怀玉陈玉新郭怀玉李艳王传永宋长虹李洪俊
Owner BC P INC CHINA NAT PETROLEUM CORP
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