渡口河气藏成藏期次研究

Study of Reservoir-forming Mode in Dukouhe

结合渡口河气藏的包裹体均一化温度分析,得出其温度范围分别为117～145℃、145～175℃和200℃以上,结合渡过口河地区的热史和埋藏史,得出气藏至少经历过3期流体充注:中侏罗世早期,古原油充注,形成早期的岩性油藏;第二期:晚侏罗世(160 Ma)时期,为岩性古油藏裂解生气原地充注和下伏上二叠统烃源岩干酪根裂解气混合充注;第三期:晚白垩世后期(96 Ma),属于气藏调整充注期,古油气藏发生调整定位。

River ferry with gas reservoir temperature of homogenization,the temperature ranges were obtained 117~145 ℃,145~175 ℃ and 200 ℃ or more.Combined with the heat through the mouth of river history and burial history of gas obtained experienced at least three fluid filling： in the early Jurassic,the ancient oil filling,the early formation of lithologic reservoir;II： Late Jurassic（160 Ma） during the cracking of the original ancient reservoir lithology to charge and the underlying Upper Permian source rock kerogen pyrolysis gas mixed charging;III： Late Cretaceous（96 Ma）,is filling gas adjustment period,adjustment of the ancient reservoir positioning occurred.