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A Restoration Method for Burial History of Strata Near Normal Faults

A restoration method and technology of burial history, applied in the field of restoration of the burial history of strata near normal faults, can solve problems such as difficulty in accurately determining fault activity time, and achieve the effects of improving drilling efficiency and saving production costs

Active Publication Date: 2019-12-27
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0005] (2) It is also difficult to accurately determine the time of fault activity in this complex geological body

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  • A Restoration Method for Burial History of Strata Near Normal Faults

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Embodiment Construction

[0048] In the following, the present invention will be specifically described through exemplary embodiments. It should be understood, however, that elements, structures and characteristics of one embodiment may be beneficially incorporated in other embodiments without further recitation.

[0049] see figure 2 , the present invention discloses a method for restoring the burial history of strata near normal faults, the specific steps of which are:

[0050] S1. Regional stratigraphic division based on well-seismic combination;

[0051] (1) Divide the strata of the study area by a single well; the specific steps are:

[0052] Summarize the previous research results and clarify the development of the strata in the study area; according to the typical characteristics of the strata of each age summarized by the predecessors, the field outcrop analysis of the strata of each era and the layer division results of mature exploration areas, clarify the lithology of each layer Characteri...

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Abstract

The invention relates to a method for restoring the burial history of strata near normal faults, the steps of which are: S1, combining well-seismic to divide the regional strata; S2, selecting the virtual well position in the target area and calculating the erosion amount of the virtual well position; S3, calculating the fault Activity rate; S4, recovery of burial history. The present invention uses well-seismic combination to divide regional strata, selects a virtual well position in the zone where the fault has not passed near the target well position, and uses the "trend analysis method" to calculate the amount of stratum erosion, and then according to the thickness of the two plates of the fault ascending wall and descending wall Characteristically calculate the rate of fault activity to clarify the period of fault activity; integrate stratum denudation data, lithology data, geothermal data and geochemical analysis data to restore the burial history of the study area. The invention can accurately restore the burial history and thermal evolution history of the strata near the fault zone, thereby laying the foundation for reservoir evolution and high-quality reservoir diagenesis research; furthermore, the distribution of high-quality reservoirs can be determined, the drilling efficiency in the exploration and development process can be improved, and production costs can be saved .

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploration, and relates to a restoration technology of stratum burial history, in particular to a restoration method of stratum burial history near normal faults. Background technique [0002] The research on the process of "basin formation-hydrocarbon formation-reservoir formation-reservoir formation" in petroleum-bearing basins can provide important support for the exploration of oil and gas reservoirs. However, whether it is the evolution of the basin, the hydrocarbon generation evolution of The process of oil and gas accumulation is closely related to the evolution process of formation burial. The accompanying changes in pressure, temperature and fluid properties during the burial evolution process will lead to a series of changes in reservoir properties, organic matter maturity, and oil and gas migration and accumulation. Therefore, the restoration of the burial history of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 操应长程鑫周立宏远光辉金凤鸣张飞鹏李宏军楼达
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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