Well - seismic analysis system and method based on tight sandstone geological - mechanical coupled lithofacies system, and device

A well-seismic analysis system based on a tight sandstone geological-mechanical coupled lithofacies system, comprising:

• an information data acquisition module acquires information data, comprising characteristic core data and rock mechanics data, wherein the characteristic core data comprises characteristic data acquired through a three-dimensional nine-point method and parameter data determined based on a mechanical experiment, and the rock mechanics data is parameter data that is sensitive to rock mechanics performance of different lithofacies and is acquired by setting different lithofacies numerical experiments based on a theory of lithofacies discretization and sensitivity analysis to study an influence of a lithofacies change on a rock strength and a fracture propagation behavior;
• a classification mode construction module connected to the information data acquisition module constructs a geological-mechanical coupled lithofacies classification mode for a tight sandstone reservoir based on the information data through a four-element composite triangle chart method;
• an integration module connected to the classification mode construction module classifies, by the geological-mechanical coupled lithofacies classification mode of the tight sandstone reservoir, geological-mechanical coupled lithofacies at a single-well level based on element difference data, and integrate multi-type lithofacies prediction results to acquire an integration result, wherein the element difference data comprises particle composition, particle size, brittleness index, and horizontal stress difference;
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• an analysis and determination module connected to the integration module performs, by a well-seismic collaborative three-dimensional model of the geological-mechanical coupled lithofacies in the tight sandstone reservoir, characteristic extraction of the geological-mechanical coupled lithofacies, lithofacies classification feedback adjustment, and seismic attribute mapping based on the integration result, and determines geological-mechanical coupled lithofacies distribution information data of the tight sandstone reservoir, wherein the well-seismic collaborative three-dimensional model of the geological-mechanical coupled lithofacies in the tight sandstone reservoir is a physical model constructed based on seismic data and a geological-mechanical characteristic relationship, and the geological-mechanical coupled lithofacies distribution information data of the tight sandstone reservoir is configured to characterize a heterogeneous distribution law of a rock mechanics and geostress characteristic of the tight sandstone reservoir, providing a basis for improving an effect of tight sandstone oil and gas extraction.