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Method for recovering burial history of stratum near normal fault

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: 2018-11-16
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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  • Method for recovering burial history of stratum near normal fault
  • Method for recovering burial history of stratum near normal fault
  • Method for recovering burial history of stratum near normal fault

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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 recovering the burial history of a stratum near a normal fault. The method comprises the steps of: S1, performing well-seismic combination for regional stratigraphic division; S2, selecting a virtual well location of a target area and calculating the denudation amount of the virtual well location; S3, calculating the fault activity rate; and S4, recovering theburial history. The invention adopts well-seismic combination to carry out regional stratigraphic division, selects a virtual well location in the vicinity of the fault of the target well location without passing through the zone, uses the "trend analysis method" to calculate the denudation amount of the stratum, then calculates the fault activity rate according to the strata thickness features of the upthrown side and the downsthrown side of the fault, and determines the fault activity period; stratum erosion data, lithology data, geothermal data and geochemical analysis data are combined torecover the burial history of the study area. The invention can accurately recover the burial history and thermal evolution history of the stratum near the fault zone, thereby laying a foundation forreservoir evolution and high-quality reservoir diagenesis research, further determining the distribution of high-quality reservoirs, improving the drilling efficiency in the exploration and development process, and saving production funds.

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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IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 操应长远光辉周立宏程鑫金凤鸣张飞鹏李宏军楼达
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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