The Sedimentary Facies Model of the Xing'anling Formation in the X Oilfield of the Hailar Basin
DOI:
https://doi.org/10.54097/bckxtz89Keywords:
X Oilfield, Sedimentary Facies, Fan Delta Sedimentation, Hailar BasinAbstract
The fault distribution direction in the Sudert structural belt of the Hailar Basin is generally NE and NE-SE, with large fault section widths and rapid changes in fault distances. Small faults are very developed in the area, reflecting the influence of multiple tectonic movements. The faults in the study area show obvious forms such as grabens, domes, fault terraces and "Y"-shaped structures. The top surface of the Xing'anling Formation mainly has fault anticlines, fault noses and fault blocks. The target layer is the Xing'anling Formation of the Nantun Formation, which is the main oil-bearing layer segment of the Xing'anling Formation, with a thickness of approximately 100-130 meters. It is a multi-source and rapid-deposition fan delta sedimentary system. From an overall perspective, the Xing'anling Formation has a gradually decreasing thickness from south to north-west direction and shows a superimposition trend; most of the sand bodies of the first and second oil groups are continuous and are distributed throughout the entire oilfield, with good oil-bearing properties; the reservoirs are mainly composed of gravelly-chert sandstones and chert sandstones, with many tuffs, and the structural maturity and component maturity of the sandstones are both relatively low.
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