Exploration method, equipment and system for lithologic oil and gas reservoirs in faulted basins

Abstract

The invention provides an exploration method, system, computer equipment and computer-readable storage medium for lithological oil and gas reservoirs in faulted basins, and relates to the technical field of lithological oil and gas reservoir exploration. The method includes dissecting the oil and gas layers of the target strata of the developed oil and gas reservoirs, and dividing and obtaining multiple oil and gas reservoir units; determining the accumulation mechanism information corresponding to the oil and gas reservoir units according to the oil and gas reservoir units; and analyzing the multi-layer system according to the accumulation mechanism information The oil and gas reservoir unit determines the enrichment model information of the complex oil and gas reservoir; performs zone evaluation according to the accumulation mechanism information and the enrichment model information, and predicts the exploration direction of the lithologic oil and gas reservoir. The invention solves the technical problem that sequence stratigraphy and conventional reservoir prediction techniques are not suitable for finding small and medium-sized lithologic oil and gas reservoirs in faulted basins at the stage of high exploration degree, and lays a foundation for the efficient exploration and development of such lithologic oil and gas reservoirs.

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 ...

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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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