惠民凹陷临北地区基山砂体油气成藏主控因素研究

临北地区位于惠民凹陷中央隆起带中部,针对该区沙三中亚段基山砂体的储层类型、圈闭规模及储层有效性不清等问题,从烃源条件、储层物性、沉积相展布以及构造特征等方面入手,通过钻井和试油成果资料,综合应用地质、地化分析和地球物理研究手段,剖析了油气成藏条件及主控因素.结果表明,紧邻的临南洼陷沙三段优质烃源岩是临北基山砂体的主要来...

Study on the Main Controlling Factors of Hydrocarbon Accumulation of Jishan Sand Body of Es3 in Linbei Area of Huimin Depression

Linbei area was located in the middle of the central uplift zone of Huimin depression. Aiming at the problems of unclear reservoir type, trap scale and reservoir validity of the Jishan sand body in this area, starting from hydrocarbon source conditions, reservoir physical properties, distribution of sedimentary facies and structural features, through the data of drilling and oil testing results, comprehensive application of geological, geochemical analysis and geophysical research means, in depth analysis of hydrocarbon accumulation conditions and main control factors. The results show that: the high?quality source rock in the third member of Shahejie formation is the main source of Linbeijishan sand body, and the good configuration of sand bodies in different periods in time and space is the basis for the formation of hydrocarbon accumulation; the relationships between the developed faults and the pathway system of framework sand body in the area provides a good migration channel for oil and gas, which results in the zonal distribution of oil and gas reservoirs along the North?South fault steps; The mudstone in the upper part of the third member of Shahejie formation and the thick mudstone at the top of the Jishan sand body are stable, The sand body of each stage are separated by mudstone and pinched out from the east to the west, the high salinity primary CaCl2 water type with good sealing property developed in the third member of Shahejie formation and the lateral sealing of some faults act together to provided good preservation conditions for oil and gas reservoirs.