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Synchronous matching method for jointly acquiring seismic data

A technology of seismic data and matching method, applied in the field of oil and gas seismic exploration

Active Publication Date: 2018-08-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a synchronous matching method for joint seismic data acquisition that can solve the time synchronization matching problem of seismic data collected by sparse stations and seismic data collected by dense geophone arrays

Method used

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  • Synchronous matching method for jointly acquiring seismic data
  • Synchronous matching method for jointly acquiring seismic data
  • Synchronous matching method for jointly acquiring seismic data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0058] Embodiment: Matching processing of data collected jointly by sparse stations and geophone arrays in a certain block of Shengli Oilfield.

[0059] Find the geophones at the same or close position as the station in the geophone array, and output the common shot point gathers of all shots according to the shot points from the geophone array data, and the common shot point gathers only contain the selected detectors recorder. figure 2 is the total shot point gather of one of the shots extracted.

[0060] Then, pick up the first-arrival arrival times of the common shot point gathers of all geophone arrays, remove the first-arrival arrival times whose offsets are less than 100m, and fit the offset and first-arrival arrival time scatter points to obtain the first-arrival traveltime and offset formulas:

[0061] t=offset / 2000 (3)

[0062] Where t is the travel time of the first arrival, in s, and offset is the distance from the shot point to the receiver point, in m.

[00...

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Abstract

The invention provides a synchronous matching method for jointly acquiring seismic data. The method comprises: extracting a common-shot point gather of seismic data of a detector array; making a first-arrival-wave time interval curve measuring plate; identifying and cutting out a seismic signal among sparse station data; carrying out time difference correction on the cut station signal; calculating first-arrival-wave superposed energy of a station seismic signal; determining a shot point with the largest superposed energy; carrying out matching of sampling intervals of the detector array seismic data and the sparse station seismic data; carrying out superposition of the common-shot point gather of the detector array and correlation coefficients of the sparse station seismic data; and outputting the common-shot point gather of the sparse station data. With the synchronous matching method, a synchronous time matching problem of seismic data collected by the sparse station and seismic data collected by the dense detector array is solved; and the obtained result is true and reliable.

Description

technical field [0001] The invention relates to the field of oil and gas seismic exploration, in particular to a synchronous matching method for joint acquisition of seismic data. Background technique [0002] In recent years, deep oil and gas reserves have increased significantly, and oil and natural gas geological reserves are abundant, but the overall exploration level is low, and there are problems such as difficulties in confirming structures and describing effective reservoirs. Although the high-precision 3D data collected by the secondary acquisition has greatly improved the imaging quality of deep seismic data, it still has a certain degree of multi-solution for the geological and reservoir description requirements. The main contradiction is the accuracy of the deep velocity model. [0003] For the inversion of deep velocity models, seismic data with large offsets must be used, but the current 3D seismic acquisition method limits the maximum offset, so conventional 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 崔庆辉芮拥军王兴谋赵胜天王胜阁柳光华冮明川王蓬
Owner CHINA PETROLEUM & CHEM CORP