吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (1): 15-28.doi: 10.13278/j.cnki.jjuese.20160357
蔡来星1,2, 卢双舫3, 肖国林1,2, 王蛟1,2, 吴志强1,2, 郭兴伟1,2, 侯方辉1,2
Cai Laixing1,2, Lu Shuangfang3, Xiao Guolin1,2, Wang Jiao1,2, Wu Zhiqiang1,2, Guo Xingwei1,2, Hou Fanghui1,2
摘要: 为了更清晰地理解优质烃源岩和优质储层的耦合关系在致密油气成藏过程中的控制作用,本文应用地化测试、恒速压汞、常规压汞、含烃流体包裹体等多种资料,对比了松辽盆地南部致密油和松辽盆地北部致密气的成藏条件。研究表明:1)优质源岩生、排烃中心基本吻合超压高值区,超压到达的边界就是致密油气富集边界。2)孔喉结构约束下的松南泉四段优质储层渗透率下限为0.10×10-3 μm2,松北沙河子组优质储层的渗透率下限为0.05×10-3 μm2。3)时间上,形成致密油气藏的前提条件是源储之间应具备"先致密后成藏"的匹配关系,这是决定其成藏机理的根本;空间上,2个研究区的"甜点区"均发育在近源、强压、高渗的优质源储叠合部位,其展布特征受控于优质源储的空间耦合关系。
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