Provenance Analysis of Daning-Jixianhe 8 Member in Ordos Basin

Abundant natural gas resources have been found in the Lower Permian Shihezi Formation in Ordos Basin, among which the 8 member of the Lower Shihezi Formation is one of the important reservoirs. Sedimentary studies and natural gas exploration of the Lower Shihezi Formation in Ordos Basin mainly focus on the interior of the basin. In recent years, DJ gas field, a large Upper Paleozoic tight gas field, has been discovered in the southeastern Ordos Basin. Among them, Hehe 8 is one of the main gas-bearing reservoirs. However, at present, the research on the northern and southern provenance deposition filling of Hehe 8 member in this block is weak, which causes trouble to the exploration and development. Based on this, through the description and characterization of the cores of 18 Wells in the study area, the observation of more than 20 outcrop points around, the detailed survey of five field profiles, the analysis of 7 groups of paleo-flow data, and the analysis of sandstone detrital components and heavy mineral characteristics, the sediment source of the 8th member of the box in DJ Gas field was analyzed. The results showed that the study area was mainly controlled by the dual provenance in the north and south directions, which intersected in the middle and lower parts of the region. The research results provide help for the further exploration and development of tight gas in DJ gas field.