Micro-logging tomography method designed by aiming at excitation well depth

A technique of stimulating well depth and tomography, applied in the field of gas exploration seismic data processing, to achieve the effect of improving reliability, broad application prospects, and ensuring acquisition quality

Active Publication Date: 2019-06-14
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a micro-logging tomography for the problem of micro-logging interpretation of artificial stratification, and innovatively propose a micro-logging tomography imaging method for effectively evaluating the near-surface velocity distribution designed for the excitation well depth

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  • Micro-logging tomography method designed by aiming at excitation well depth
  • Micro-logging tomography method designed by aiming at excitation well depth
  • Micro-logging tomography method designed by aiming at excitation well depth

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Embodiment Construction

[0037] In order to make the above-mentioned advantages of the present invention more comprehensible, preferred embodiments are specifically listed below and shown in accompanying drawings, and are described in detail as follows.

[0038] like figure 1 as shown, figure 1 It is a flow chart of the micro-logging tomography method designed for the excitation well depth according to the present invention.

[0039] Step 1: Input the micro-logging information (station number, horizontal and vertical coordinates, elevation), the depth and first arrival travel time data (Z, T) collected by the micro-logging, and the interpretation information of the micro-logging horizon (Z L ,V L ),in,

[0040] Z is the micro-logging depth;

[0041] T is the travel time of the vertical first arrival of the micro-logging;

[0042] Z L Horizontal depths interpreted for micrologs;

[0043] V L Interval velocities interpreted for micrologs;

[0044] The input micro-logging information includes st...

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Abstract

The invention provides a micro-logging tomography method designed by aiming at excitation well depth. The method comprises the following steps that: inputting micro-logging information, micro-loggingfirst-arrival travel time data and micro-logging horizon explanation information; determining inversion depth and an inversion grid; on the basis of the determined inversion grid, carrying out gridding on the micro-logging horizon explanation information to obtain an explanation constraint item consistent with a model size; constructing an equation set, and adding a speed smooth item and a micro-logging explanation constraint item; solving the equation set to obtain an inversion result; and resampling the result to obtain a speed model which conforms to requirements. By use of the micro-logging tomography method designed by aiming at the excitation well depth, human influences are lowered, obtained speed distribution contains more near-surface construction details so as to be convenient inobtaining accurate optimal excitation depth and guaranteeing the collection quality of seismic data, and therefore, a foundation is laid for subsequent seismic data processing.

Description

technical field [0001] The invention relates to the technical field of gas exploration seismic data processing, in particular to a micrologging tomography method designed for excitation well depth. Background technique [0002] Near-surface problems are one of the most common problems in land seismic exploration. In order to study the near-surface structure, near-surface investigation (small refraction, micro-logging, etc.) is currently a routine production link. The micro-logging interpretation method can select the best excitation lithology and well depth for seismic data acquisition to ensure the quality of seismic data acquisition. In addition, the micro-logging data can also be used to obtain the variation law of the surface velocity and thickness in the work area in the horizontal and vertical directions, and provide static correction for indoor seismic data processing. For seismic exploration in complex areas such as the piedmont zone, how to calculate the near-surf...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40G01V1/30
Inventor 金昌昆尚新民王延光崔庆辉赵胜天滕厚华苗永康
Owner CHINA PETROLEUM & CHEM CORP
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