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通过气源岩热演化生烃史、储层流体包裹体均一温度、天然气轻烃及构造活动综合分析,探讨了济阳坳陷渤南—孤北地区深层天然气藏的形成时间和期次。研究表明,孤北潜山带存在2期不同成因天然气的充注过程:煤成气于新近纪馆陶沉积晚期充注、油型气于新近纪明化镇中期充注;渤南洼陷油型气藏存在沙一末至东营末期和明化镇期至现今的2次充注过程,以第二期充注为主。不同构造部位、不同层系的成藏期有明显差异,构造低部位气藏形成时间早于高部位。
The formation time and period of deep natural gas reservoirs in Bonan - Gubei area of Jiyang Depression are discussed through the hydrocarbon generation history of gas source rocks, the homogenization temperature of fluid inclusions, the light hydrocarbon of natural gas and tectonic activities. The results show that there are two filling processes of natural gas with different genetic origins in the Gubei subalpine zone: the coal gas was charged late in the late Cenozoic Guantao deposit, the oil gas was filled in the middle of the Neogene Minghua Town, and the Bonan slant oil Gas reservoirs exist from the end of the sand to the end of Dongying and Minghua period to the present of two filling process, with the second filling. Different tectonic positions and different stratigraphic periods have obvious differences during the hydrocarbon accumulation period, and the formation time of gas reservoirs with low positions is earlier than that of high positions.