HYDROCARBON EVALUATION AND EXPLORATION DIRECTION OF FUXIN REFORMED BASIN

Fuxin Basin has undergone the reformation of multiple tectonic movements, leading to the damage of hydrocarbon reservoir preservation conditions by faults, hydrocarbon losses and multi-sources. Through the study on basin reformation type, hydrocarbon evaluation and exploration direction, it is considered that Fuxin Basin belongs to the overall uplifting, reformed and denuded type, with the main source-reservoir-cap rocks of Jiufotang Formation and Shahai Formation well preserved. The hydrocarbon evaluation should combine the "source-control theory" forward analysis of prototype basin tectonic evolution with the reverse understanding of "preservation unit" to evaluate preservation and enrichment of reservoir. Structural analysis is the key to the study, including determination of hydrocarbon sources by formation, determination of structural-sedimentary facies belts by reformation, and reservoir controlling by preservation. The primary hydrocarbon reservoirs in Haizhou subsag and Yimatu subsag are the main exploration directions.