Exploration method, equipment and system of fault basin lithologic oil-gas reservoir

Abstract

The invention provides an exploration method, equipment and system of fault basin lithologic oil-gas reservoir, computer equipment and a computer readable storage medium, and relates to the technicalfield of lithologic oil-gas reservoir exploration. The method comprises the steps of dissecting a target zone oil-gas layer of already-developed oil-gas reservoir, and performing division to obtain aplurality of oil-gas reservoir units; determining accumulation mechanism information corresponding to the oil-gas reservoirs according to the oil-gas reservoir units; analyzing the oil-gas reservoir units in a multi-zone way according to the accumulation mechanism information, and determining enrichment mode information of composite oil-gas reservoir; and performing play evaluation according to the accumulation mechanism information and the enrichment mode information, and forecasting an exploration direction of the lithologic oil-gas reservoir. By the method, the technical problem that sequence stratigraphy and conventional reservior prediction technology is not suitable for looking for medium- and small-size lithologic oil-gas reservoir in fault basin during high exploration degree stageis solved, and a foundation is laid for high-efficiency exploration and development of such lithologic oil-gas reservoir.

Description

technical field [0001] The present invention relates to the technical field of lithologic oil and gas reservoir exploration, in particular to fine exploration technology for lithologic oil and gas reservoirs in rift basins, and specifically to a method for exploring lithologic oil and gas reservoirs in compound oil and gas accumulation zones in rift basins with high exploration degree, systems, computer devices, and computer-readable storage media. Background technique [0002] According to the exploration theory of complex oil and gas accumulation belts in the Bohai Bay Basin, in faulted basins, due to strong fault block activities, large changes in lithology and lithofacies, strata overlapping and depositional discontinuities, various types of traps are developed on secondary structural belts. The formed oil and gas reservoirs of different types are distributed in groups and belts, and the oil and gas reservoirs of different strata are superimposed and connected. Such oil ...

AI Technical Summary

Problems solved by technology

Limited by factors such as small scale of continental sedimentary reservoirs, rapid phase change and low quality of conventional seismic data, except for a small number of large lithologic traps, the prediction accuracy is not high. Difficult to obtain satisfactory application effect

The exploration methods of lithologic oil and gas reservoirs published in the literature either talk about specific blocks and individual technologies, which limits their popularization and application;

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