Structural interpretation method for fault block oil and gas field

A technology for structural interpretation and oil and gas fields, applied in the field of geophysical exploration, can solve problems such as low interpretation accuracy, and achieve the effect of improving interpretation accuracy and avoiding multiple solutions.

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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  • Application Information

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Problems solved by technology

[0007] The purpose of this application is to provide a structural interpretation method for fault-block oil and gas fields to solve the problem of low interpretation accuracy of existing existing methods

Method used

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  • Structural interpretation method for fault block oil and gas field
  • Structural interpretation method for fault block oil and gas field
  • Structural interpretation method for fault block oil and gas field

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Embodiment Construction

[0028] like figure 1 Shown, the present invention comprises the following steps:

[0029] 1) Select a faulted basin as the research area, and load post-stack 3D seismic data and well logging data into the computer workstation to construct a seismic database. Logging data include: well coordinates, logging curves, geological stratification, well deviation data, oil and gas display and production data (including oil testing, oil production results, etc.). The present invention utilizes interpretation software such as Geoframe and Landmark.

[0030] 2) Generate seismic data volumes based on seismic data, conduct preliminary analysis and processing of seismic data volumes, generate time slices and coherent volume slices, and understand the maximum and minimum amplitudes of seismic waves, as well as the frequency bandwidth and main frequency characteristics of seismic data. like figure 2 Seismic profile of the study area.

[0031] 3) According to the regional structural backgr...

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Abstract

The invention relates to a structural interpretation method for a fault block oil and gas field, which comprises the following steps of: collecting seismic data and logging data of a research area, and performing preliminary fault interpretation and preliminary structural interpretation; on the basis of the preliminary fault interpretation, the backbone section is interpreted, and an initial framework is formed; the backbone section comprises a section corresponding to a well passing main measuring line and a well connecting line; on the basis of the initial framework, selecting a section every N main measuring lines, selecting a section every M connecting lines, and explaining the sections to obtain a fault initial explaining model; on the basis of the fault initial interpretation model, more sections are interpolated step by step, interpretation is carried out, and a fault final interpretation model is obtained; according to the preliminary structural interpretation and the fault final interpretation model, establishing a structural model; and verifying according to the seismic data and the logging data. According to the interpretation method, the interpretation precision can be improved by gradually interpolating the section.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a structural interpretation method for complex fault block regions of fault block oil and gas fields. Background technique [0002] Fault refers to the structure formed by the rupture and displacement of rock layer or rock mass under the action of stress during the movement of the earth's crust. Multiple faults form a fault. Faults are widely developed in the earth's crust and are one of the most important structures in the earth's crust. Most of the oil and gas-bearing basins in my country are faulted basins, and faults control the formation process of faulted basins. Faults cut strata to form fault blocks, and fault block oil and gas reservoirs (ie fault block oil and gas fields) can be formed after fault blocks contain oil and gas. Fault block oil and gas reservoirs often exist attached to faults, and the nature, size and position of faults control the formatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/306G01V2210/62G01V2210/642G01V2210/64
Inventor 彭国桃张玉体李继东王德波张泽均梅冰王金志卓色强
Owner CHINA PETROLEUM & CHEM CORP
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