Petroleum migration pathways quantitative evaluation method

Abstract

The invention relates to a petroleum migration pathways quantitative evaluation method. The method combines geological analysis and hierarchical analysis. Parameters affecting the migration performance of faults and sand bodies in fault-sand body migration pathways are considered more comprehensively, including fault mobility, lithology opposition relationship between the two sides of faults, section morphology in the longitudinal direction, section morphology in the moving direction and level of fault as well as sand body effective thickness, porosity and permeability, sand body top morphology, sand body slope and sedimentary facies. On the basis of fault and sand body migration pathways multiple-parameter geological analysis, a hierarchical analysis mathematical method is adopted, the roles of the multiple parameters in the migration pathways are considered in a unified way, and quantitative evaluation of the fault-sand body migration pathways is realized. Meanwhile, the migration performances of unit migration pathways of different structures are compared quantitatively, and a favorable exploration area is easier to select. Compared with the existing evaluation method, geological analysis and the quantitative evaluation of the migration pathways are more accurate, and the success rate of petroleum exploration is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of oil and gas geological exploration, and in particular relates to a quantitative evaluation method for an oil and gas transport system. Background technique [0002] Petroleum migration pathways were first proposed by Gussow in 1954 and defined as limited fluid migration pathways mainly controlled by structural morphology. With the development of the transport system, most scholars currently define it as: all the path networks experienced by oil and gas from source rocks to traps and related surrounding rocks, including connected sand bodies, faults, unconformities and Its combination (Zhang Zhaolu, 2000). On the one hand, this definition clarifies the elements of the transport system, and on the other hand, it implies the relationship between the transport system and source rocks and traps, that is, the transport system must connect source rocks and traps in some way. As a "bridge and link" between hydr...

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Problems solved by technology

[0014] (1) Most of the current quantitative evaluation methods for the transport system are based on the single parameter of a single transport body, without considering multiple parameters at the same time to realize the quantitative evaluation of the entire transport system, and the evaluation of the transport performance of the transport system is not comprehensive enough. accurate and intuitive

[0015] (2) The current evaluation of the entire transport system is mainly qualitative evaluation. Due to the differences in transport bodies between different structural units, it is often difficult to compare the transport performance of each transport system, which restricts the selection of favorable exploration areas and reduces the Success Rate of Oil and Gas Exploration

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