Oil shale earthquake identification and evaluation method

A technology for seismic identification and evaluation methods, which is applied in the fields of seismology, seismology, and seismic signal processing for logging records.

Inactive Publication Date: 2016-07-20
CHENGDU CHUANGYUAN OIL & GAS TECH DEV
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Problems solved by technology

China is rich in oil shale resources and has great resource potential, but the exploration in Chengdu is relatively low, all ore-bearing areas are only in the stage of detailed survey and general survey, and the exploration technology is backward, and the exploration method is single
At present, well logging technology is relatively mature in the identification and evaluation of oil shale, and is widely used in various oil shale ore-bearing areas, but there are few studies on the theoretical basis and related technologies of seismic identification and evaluation of oil shale. research is currently blank

Method used

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  • Oil shale earthquake identification and evaluation method
  • Oil shale earthquake identification and evaluation method
  • Oil shale earthquake identification and evaluation method

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Embodiment

[0036] A seismic identification and evaluation method for oil shale, comprising the following steps:

[0037] Step a, using the wave impedance ΔlogR overlapping method to calculate the organic carbon content TOC of shale gas;

[0038] Step b, the TOC value calculated in step a is consistent with the TOC value obtained by actually measuring the sample;

[0039] In step c, the oil shale is composed of organic matter, mineral matter, and water. Starting from the rock structure of the oil shale, a petrophysical model of the oil shale is established, which further includes

[0040] In step c.1, organic matter and mineral matter form a layered rock matrix according to the Reuss averaging method;

[0041]

[0042]

[0043] Among them, K matrix and u matrix are bulk modulus and shear modulus of rock matrix, GPa; K mineral and u mineral are the bulk modulus and shear modulus of the mineral, respectively, f mineral and f kerofen Respectively, the volume content of mineral m...

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Abstract

The invention discloses an oil shale earthquake identification and evaluation method, which comprises the steps: a) calculating shale gas organic carbon content TOC through a wave impedance delta logR superposition method; b) the TOC value calculated in the step a) being same with the actually-measured TOC value of samples; c) establishing a rock physical model of an oil shale; and d) establishing a logging curve of logging information and seismic attribute longitudinal wave velocity by utilizing seismic channels beside a shale gas well. The rock physical model is established, and organic content of the oil shale is obtained through velocity inversion; and through the earthquake multi-attribute prediction technique, oil content information is inverted and extrapolated to seismic data, so that earthquake oil content inversion data volume of a work area is obtained, and a foundation is laid for identification and evaluation of the oil shale.

Description

technical field [0001] The invention relates to the technical field of oil shale logging, in particular to a method for seismic identification and evaluation of oil shale. Background technique [0002] Oil shale belongs to unconventional oil and gas resources. It is listed as a very important alternative energy in the 21st century because of its rich resources and feasibility of development and utilization. China is rich in oil shale resources and has great resource potential, but the exploration in Chengdu is relatively low. All ore-bearing areas are only in the stage of detailed survey and general survey, and the exploration technology is backward and the exploration method is single. At present, well logging technology is relatively mature in the identification and evaluation of oil shale, and is widely used in various oil shale ore-bearing areas, but there are few studies on the theoretical basis and related technologies of seismic identification and evaluation of oil sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169
Inventor 刘欢金涛
Owner CHENGDU CHUANGYUAN OIL & GAS TECH DEV
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