Sequence stratigraphic characteristics of the lower second member, Shahejie formation, W79 block

摘要

Guided by the principles of high-resolution sequence stratigraphic theory, comprehensively using drilling, testing and seismic data, this paper carried out a high resolution stratigraphic correlation research. The Lower Second Submember of Shahejie Formation could be divided into 2 long-term baselevel semi-cyclic units and 6 middle-term semi-cyclic units. Under the sequence framework, 58 small layers could be divided within the target interval. The division is at a single sand body scale and is supposed to efficiently support the enhancing of hydrocarbon recovery.