Study on Reservoir Characteristics of S0 Formation Oil Reservoir in X Area

Abstract The early research results of the D Oilfield believed that the S0 Formation was mainly gas-bearing, but according to the data of the core wells in L, S and X, oil-bearing signs were found in the S0 Formation. In view of the S0 Formation, it is necessary to re-study its reservoir characteristics. After sorting and refining the stratigraphic characteristics of the S0 Formation, the reservoir characteristics, sedimentary facies characteristics and other basic physical properties are summarized by using multiple channels such as seismic and logging data. After summarizing the characteristics, the reservoir properties are divided, and the theoretical scope of high-quality reservoirs is proposed. The top surface of S0 is an anticline with low wings and high middle. The trend of the core is NWW, and the highest part is in the north of the anticline. The strike of the fault is northwest-southeast, the extension length of the fault is 1.5-5km, and the fault distance is 10-60m;The sandstones of the upper S0 Sandstone Formation are developed, and the sandstones have good lateral connectivity, while the sandstones of the Lower S0 Sandstone Formation are sporadically developed. In the X area, the upper S0 Sandstone Formation is the provenance in the northeast, and the river channels are developed, which are distributed in the NNE and near-NS direction. The development of the river channel on the west side is better than that on the east side, and the lower S0 river channel is not developed. In the current situation that the oilfield is more and more difficult to tap the potential, try to find the reserves as much as possible to develop the reserves potential, which is very important to maintain the sustainable development of the oilfield.