Method for optimizing structure of annular water retention rate logging sensor array

A technology of sensor array and optimization method, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc., can solve the problem that the instrument cannot fully reflect the real situation in the downhole, achieve the effect of structural optimization and improve measurement accuracy

Inactive Publication Date: 2011-04-13
BEIHANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

In the past, centered sampling was used in vertical wells, and linear measurement instruments can no longer fully reflect the real situation downhole. For this reason, Schlumberger and Sondex have respectively launched Flagship and array imaging logging tool series MAPS and other new logging instruments that use nonlinear measurement methods.

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  • Method for optimizing structure of annular water retention rate logging sensor array
  • Method for optimizing structure of annular water retention rate logging sensor array
  • Method for optimizing structure of annular water retention rate logging sensor array

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Embodiment Construction

[0020] figure 1 It is a flow chart of the present invention, wherein the square frame with rounded corners represents the steps of the present invention, and the rectangular square frame represents its corresponding result; figure 2 It is a calculation flow chart of the error analysis method adopted when calculating the height measurement error and the water holdup measurement error in the present invention, wherein the square boxes with rounded corners represent the steps of the error analysis method, and the rectangular square boxes represent the corresponding results; image 3 It shows the sensor array part of a specific annular array water holdup logging tool and the cross-section of its measuring pipeline. The sensor array of the device has 12 measuring sensors (302) (conductivity probes), which are respectively installed in 12 etc. Angle distribution on the support arm (304). The support shaft (305) is located at the center of the pipeline and is coaxial with the pipelin...

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Abstract

The invention relates to a method for optimizing the structure of an annular water retention rate logging sensor array. The method for optimizing the structure of the annular water retention rate logging sensor array is characterized by comprising the following steps of: determining each optimization parameter and a value area thereof according to the specific sensor array in actual engineering application; calculating a height measurement error and a water retention rate measurement error of the sensor array under different optimization parameters by an error analysis method; determining weighting coefficients of the height measurement error and the water retention rate measurement error; and calculating the weighted sum of the height measurement error and the water retention rate measurement error under each optimization parameter, and determining the optimization parameter minimizing the weighted sum as an optimization result. The method is used for optimizing the structure of the sensor array of an annular array water retention rate logging device; and when the annular water retention rate logging sensor array is used for detecting an interface height and a water retention rate by an electronic probe method, the measurement precision can be improved.

Description

technical field [0001] The invention relates to a structural optimization method of an annular water holdup logging sensor array, which can be used to improve the measurement accuracy of the oil-water interface and the water holdup of an annular array type water holdup logging device for stratified flow in horizontal wells. Background technique [0002] Production logging refers to the general term for geophysical logging performed during the entire production process of oil wells (including oil production wells, water injection wells, observation wells, etc.) from commissioning to scrapping. It includes three parts: dynamic logging, engineering logging and formation parameter logging. As a part of dynamic logging content, production profile logging refers to understanding the production profile through the measurement of temperature, pressure, fluid flow and water holdup in the well. Production profile data is the basis for oil field stabilization and water control and com...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): E21B47/00E21B49/00
Inventor徐立军曹章徐文峰陈健军刘兴斌马水龙胡金海
OwnerBEIHANG UNIV