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Bidirectional out-of-line rolling measuring seismic exploration and acquisition method

A technology of seismic exploration and acquisition method, which is applied to improve the deep excitation energy of seismic data in urban areas or obstacle areas, and in the field of seismic exploration and acquisition in urban areas or obstacle areas. Uneven distribution of points, etc., to avoid repeated construction, improve construction efficiency, and ensure the quality of data

Active Publication Date: 2010-05-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a two-way non-longitudinal rolling observation seismic exploration and acquisition method, aiming at the fact that there are few shot points that can be excited by well shot in the urban area, and the distribution of shot points is uneven, resulting in insufficient energy in deep layers of data collected by seismic exploration. Two-way non-longitudinal rolling observation, the use of urban areas can implement repeated excitation of well shots, and enhance the overall excitation energy of middle and deep layers in seismic exploration and acquisition

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  • Bidirectional out-of-line rolling measuring seismic exploration and acquisition method

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Embodiment

[0031] Embodiment: Take the two-way non-longitudinal rolling observation seismic exploration acquisition method as an example in the Xingang Phase II seismic exploration of Dagang Oilfield to further describe the present invention in detail.

[0032] 1. Main acquisition technical parameters

[0033] Observation system: 8 lines, 4 guns, 176 channels (8L4S176R)

[0034] Longitudinal observation system: 4375-25-50-25-4375m

[0035] Number of receiving lines: 8 Number of single-line receiving channels: 176

[0036] Line spacing: 200m Track spacing: 50m

[0037] Shot line distance: 200m Shot point distance: 50m

[0038] Covering times: 4 times horizontally × 22 times vertically

[0039] Panel size: 25×25m

[0040] Harness direction: 333°

[0041] Excitation method: vibrator, well shot

[0042] 2. The technical problems solved by the present invention

[0043] Xingang Phase II seismic exploration is mainly based on Tanggu City, mainly using a 23-ton vibroseis source for exci...

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Abstract

The invention provides a bidirectional out-of-line rolling measuring seismic exploration and acquisition method, which is applicable to the seismic exploration and acquisition in urban areas or hazards. The invention adopts light-tonnage controllable source and / or shothole source to stimulate earthquake waves and adopts an earthquake instrument of over 5000 paths and a moving-coil type geophone to receive earthquake signals. The method in the invention comprises the following steps: A. arranging construction point location; B. designing out-of-line observation system; C. implementing bidirectional out-of-line rolling observation; and D. implementing bidirectional out-of-line rolling measuring, and the key lies in accurately determining the position of the out-of-line shotpoint, and the out-of-line shotpoint and the normal shotpoint correspond to identical receiving arrangement. The invention has the effects of utilizing limited urban shothole shotpoint to repeat implementation, strengthening the stimulating energy of medium and deep layers, improving the signal to noise ratio of medium and deep layers in seismic exploration and acquisition, obviously improving energy in medium and deep layers in seismic exploration and acquisition data, obviously improving signal to noise ratio, and simultaneously ensuring construction time effectiveness and saving cost.

Description

technical field [0001] The invention relates to the technical field of petroleum geophysical prospecting seismic exploration acquisition, in particular to a seismic exploration acquisition in an urban area or an obstacle area, and is a method for increasing the excitation energy of deep layers in seismic data in an urban area or an obstacle area. Background technique [0002] At present, in the field of petroleum geophysical exploration, seismic exploration is the most effective exploration method. The principle of seismic exploration is to generate seismic waves down through artificial ground excitation, reflect and refract when meeting the underground impedance surface and return to the ground, receive seismic wave information through ground geophones for data analysis, study the characteristics of underground geological structures, and even the characteristics of underground fluids, and realize the detection of underground The purpose of oil and gas storage. [0003] Sei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/13G01V1/20
Inventor 姚建军翟桐立赵国旺刘次源蔡爱兵周建生岳英祝文亮
Owner PETROCHINA CO LTD
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