| The Hongche fault zone in the Junggar Basin is rich in oil and gas resources.The Permian is the most important oil-bearing strata,and it is also a favorable reservoir.The Triassic system above the Permian is a large-scale regional caprock.The Permian of Xiazijie Group has a favorable combination of source-reservoir-cap.In 2014,high-yield industrial oil flow was obtained in the Hong153 well of the Permian xiazijie Formation in the Hongche fault zone of the Junggar Basin.Under this background,it is very important to carry out research on the structural characteristics,sedimentary facies and reservoir control factors of the Hong153 well.Based on the investigation and analysis of the sedimentary background of the Hongche belt fault zone,using seismic,drilling,logging,logging,core and other data,through the study of structural fine interpretation and sedimentary characteristics,the sedimentary characteristics of Xiazijie Formation in Hong153 well area are determined.Study and analyze the distribution law of reservoirs in the Xiazijie Formation of the Permian,and study the effects of deepening structures on sediment and reservoir control.The research of the thesis has achieved the following results and understanding;(1)The overall Hong 153 well area in the northern part of the Hongche fault zone is characterized by thrust nappe forming a northwestward uplifted monoclinic structure,and the reverse fault is relatively developed.Different grades of faults control the development of sedimentary systems and reservoir distribution.(2)The stratum thickness of the Permian Xiazijie Formation in the Hong153 fault zone is 50-800 m.The stratigraphic distribution is characterized by thick north and south thinner,and the middle and thicker parts of the middle part are gradually thinner.The characteristics of alluvial fans formed by the rapid accumulation of near-source in the case of strong hydrodynamic carrying sediments with steep slope.According to the analysis of seismic geological data,the source of this area is mainlyin the northern part of the study area.(3)The alluvial fan sedimentary system is developed in Xiazijie Formation of Hong153 well area,and is divided into fan root,fan middle and fan margin subfacies,fan root development debris flow,fan turbulent zone,turbulent sand island and flooding Belt,fan edge development runoff waterway and fan edge wetland,the overall trend of retreat.(4)The tectonic fault pattern of the Xiazijie Formation in the Hong153 area controlled the source direction of the sedimentary system.The tectonic fault size controlled the development range and reservoir distribution of the alluvial fan.The tectonic activity evolution controlled the characteristics of the sedimentary system. |
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