Method for comprehensively identifying basin edge deposition fan body in deep water area of South China Sea oil-gas-containing basin

Abstract

The invention provides a set of technical method for systematically and comprehensively identifying a basin edge deposition fan body in a deep water area of a South China Sea oil-gas-containing basin.The invention relates to a method for quantitatively identifying a sedimentary fan body at the basin edge of a sedimentary basin by comprehensively analyzing six kinds of data such as same sedimentary faults, landforms, object sources, seismic facies, seismic attributes and a sedimentary center. The method is particularly suitable for deep water areas of oil-gas-bearing basins in the South ChinaSea. According to the method, on the basis of inheriting a former person recognition method, a tectonic sedimentology theory and a seismic sedimentology theory are combined, multi-method, multi-angleand five-in-one cooperation is adopted to recognize and judge the development of the basin edge sedimentary fan body, finally quantitative research is achieved, and the accuracy and credibility of a recognition result are greatly improved; meanwhile, different identifications in each identification method are assigned, the final total score is calculated, whether the fan body develops or not is quantitatively described, and the method is convenient and operable.

Description

Technical field [0001] The invention relates to the field of petroleum geology, and in particular to a method for comprehensively identifying basin margin sedimentary fans in the deep water area of ​​the South China Sea petroliferous basin. Background technique [0002] In the field of petroleum geology, with the great success of oil and gas exploration in the Gulf of Mexico, the Columbia Basin and the African coast, the marginal fan of the sedimentary basin has received more and more attention from petroleum geologists and has become a hot target area for oil and gas exploration. Basin margin fans can be used as important reservoirs, and fan plains are favorable coal accumulation sites (reference). [0003] With the increasing demand for oil and gas resources and the mature exploration of onshore basins, the South China Sea area has received more and more attention from the Chinese government (reference), because the South China Sea is widely distributed in Cenozoic petroliferous ...

AI Technical Summary

Problems solved by technology

In offshore deepwater basins, wells are rarely drilled, and the seismic quality is relatively poor, so this method is not applicable

[0005] At present, no scholars have studied how to systematically carry out comprehensive identification of basin margin sedimentary fans in deep water areas of offshore oil and gas basins. Previous studies on basin margin fans in deep water areas only relied on seismic facies characteristics, while deep water areas mostly Seismic quality in some areas is poor, this identification method often has a certain degree of blindness and uncertainty, and the seismic facies identification sector itself has a certain degree of multi-solution

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