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通过对松辽盆地北部安达地区源岩条件、排烃动力条件、油源断裂、储层、圈闭等成藏要素的综合研究,明确了安达凹陷中浅层油气成藏的主控因素及成藏规律。研究表明:(1)成熟烃源岩的发育程度是安达凹陷中浅层油气成藏的首要控制因素,控制了油气藏的范围及规模;(2)对于泉四段而言,在成熟烃源岩内青一段的超压发育程度是其成藏的主要控制因素;(3)对于青山口组而言,油源断裂是基础,青二+三段储层的发育程度是其成藏的主要控制因素;(4)安达凹陷整体相对较低的成熟度(大部分地区Ro<0.9%)及相对较薄的烃源岩(大部分地区烃源岩的厚度小于80m)造成的生烃潜力不足可能制约了姚家组的成藏。
Based on a comprehensive study of source rocks, hydrocarbon expulsion conditions, oil source fractures, reservoirs and traps in the Anda area in northern Songliao Basin, the main controlling factors of hydrocarbon accumulation in the middle and shallow layers of the Anda depression Tibetan law. The results show that: (1) The development degree of mature source rocks is the primary controlling factor of middle-shallow oil and gas accumulation in the Anda depression, controlling the scope and scale of oil and gas reservoirs; (2) For the fourth member of Quanquan, (3) For the Qingshankou Formation, the oil source fracture is the foundation, and the development degree of the QingⅡ + Ⅲ reservoirs is the main controlling factor of hydrocarbon accumulation (4) the relatively low potential maturity of the whole Anda depression (Ro <0.9% in most areas) and the relatively thin hydrocarbon source rocks (less than 80 m in most areas) Restricted the formation of Yaojia Formation.