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The hydrocarbon formation mechanism and potential targets in clastic strata from the Tabei Uplift, Tarim Basin, are documented using the fault mesh petroleum plays theory based on integrating seismic, well log, well core and geochemistry data. The reservoirs in the Donghetang area are typical allochthonous and far source fault mesh petroleum plays. There are two sets of fault meshes in the study area, the Donghe sandstone and Permian and Triassic strata combination as well as the fourth and third formation combination, in the Jurassic strata. The fault mesh petroleum play in the Jurassic is a secondary reservoir that originates from the Carboniferous Donghe sandstone reservoir adjustment based on source correlation. The fault mesh carrier systems are divided into four styles, which include the fully-connected, fault-unconformity-transient storage relay, fault-transient storage-unconformity relay and transient storage-fault relay styles, according to the architecture of the fault mesh. Based on the characteristics of the fault mesh petroleum plays, the reservoirs are divided into three categories, including an upper-transient storage, inner-transient storage, and margin-transient storage styles, and 15 styles of those reservoirs. Integrated analysis of the hydrocarbon generation and faulting time periods reveals that there were four periods of hydrocarbon charging, with the first three stages charging the reservoirs with oil and the last stage charging the reservoirs with gas. There are multiple stages of reservoir accumulation and adjustment in the fault mesh in the study area. These multiple stages of fault mesh accumulation and adjustment are the main reason that the reservoir distribution multiple vertical units have different hydrocarbon properties. Fault-block reservoirs and lithologic reservoirs related to the inner-transient storage and upper-transient storage styles are the main exploration targets in the clastic strata in the study area.

FAULT MESH PETROLEUM PLAYS IN THE DONGHETANG AREA, TABEI UPLIFT, TARIM BASIN, NW CHINA, AND ITS SIGNIFICANCE FOR HYDROCARBON EXPLORATION