Representation method for describing old fault top surface structure diagram

A technology for structural maps, faults, used in earthwork drilling, surveying, wellbore/well components, etc.

Active Publication Date: 2016-02-10
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] In oil and gas exploration, the structural map of the top surface of denuded and uplifted strata is the basic map. For such hidden faults that have no fault throw on the top of denuded strata but play an important role in controlling the accumulation of buried hills, there is no clear definition on the structural map. This has brought a lot of inconvenience to the oil and gas exploration of the former Tertiary system. Therefore, we have invented a new representation method to describe the structural map of the top surface of the old fault. Structural map of complex old faults such as strike-slip and inversion on the top surface of denuded and uplifted strata, which solves the above technical problems

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  • Representation method for describing old fault top surface structure diagram
  • Representation method for describing old fault top surface structure diagram
  • Representation method for describing old fault top surface structure diagram

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Embodiment Construction

[0018] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.

[0019] Such as figure 1 as shown, figure 1 It is a flow chart of the present invention describing the representation method of the old fault top surface structure map.

[0020] In step 101, understand the basic geological situation of the study area, collect relevant data on structural evolution, and be familiar with the tectonic movement and stress direction experienced by the study area. The main purpose of this step is to understand the basic geological framework of the study area, to ensure that the next structural interpretation conforms to the geological conditions of the area, and to make the structural interpretation more reasonable. The process goes to step 102.

[0021] In step 102, interpretation of the denuded and uplifted formatio...

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Abstract

The invention provides a representation method for describing an old fault top surface structure diagram. The representation method for describing the old fault top surface structure diagram comprises the steps that 1, the top surface of an eroded and lifted stratum is interpreted according to logging information of a drilled well; 2, fault interpretation is performed in a seismic section, and fault combination is performed on a plane after the interpretation on the seismic section is completed; 3, fault classification is performed according to the fault displacement existing situations of faults on a top interface, and fault grading is conducted on the faults according to the fault displacement amounts and the lengths of the faults. By means of the representation method for describing the old fault top surface structure diagram, the problem of representation of blind faults on the top surface structure diagram is effectively solved. The representation method has the great significance on oil-gas exploration work of a front tertiary stratum, is simple, clear and good in operability and has very good practicability in structure diagram drawing.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a representation method for describing the structural diagram of the top surface of an old fault. Background technique [0002] With the increasing demand for oil and gas energy, oil and gas exploration horizons have gradually deepened, and pre-Tertiary oil and gas exploration has also become the focus of exploration in many areas. According to the analysis of the pre-Tertiary oil reservoirs discovered so far, structural oil and gas reservoirs are the main reservoir types, and structural faults are also the main controlling factors for oil and gas accumulation. Therefore, fine and accurate structural interpretation is the most basic and most important work for pre-Tertiary oil and gas exploration. [0003] The pre-Tertiary strata have generally experienced multiple tectonic movements. Many early faults in the eastern exploration area were inversely inferred due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/00
Inventor 石砥石王永诗熊伟郭玉新刘菊刘静马魁勇单体珍徐昊清杨贵丽秦永霞孙锡文张明华王莉赵美松刘晓林许晓凤鲍倩倩马立驰
Owner CHINA PETROLEUM & CHEM CORP
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