Method for determining air layer using acoustic wave split-double pole transverse wave well-logging data

A logging data and dipole technology, applied in low-resistivity gas layers, low permeability, and low-porosity fields, can solve problems such as high requirements for reservoir physical properties, limited application range, and no obvious effect, and achieve enhanced geological solutions Ability to problem, effect of improving ability
CN100429529CActive Publication Date: 2008-10-29BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2008-10-29

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Abstract

A method of utilizing full wave column and dipolar lateral wave well-logging data to confirm gas layer includes setting up lateral-longitudinal wave conversion cross map of various gas saturation degree at gas reservoir in exploration area according to known rock physical character, utilizing acoustic wave data lateral wave time difference to confirm longitudinal wave time difference at various gas saturation degree, measuring longitudinal wave time difference and using various gas saturation degrees in said cross map to confirm gas situation in reservoir.
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Description

technical field

[0001] The invention relates to a method for determining low-porosity, low-permeability and low-resistance gas layers by using transverse and longitudinal wave time-difference logging data in the exploration and development of clastic rock conventional and unconventional gas reservoirs. technical background

[0002] With the deepening of gas field exploration and development, the problem of determining difficult gas layers in clastic rocks has become more and more serious, and the focus is on the determination and identification of gas layers with low porosity, low permeability and low resistance. The basic method of logging to identify gas layers is based on the changes in electrical and radioactive characteristics of gas-bearing reservoirs. Conventional typical gas-bearing reservoirs show logging characteristics such as increased resistivity, increased acoustic transit time, decreased neutron porosity and increased density porosity, and the combination of n...

Claims

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