Author(s): CHEN Yicai1, KANG Rendong1, LI Yanjun2, HUANG Jianquan2, ZHANG Daisheng3, TU Xiaoxian3, WANG Jiahui31.collegeofenergyresources, CHENGDU Universityoftechnology, CHENGDU 610059, china, 2.COLLEGE Ofearthresourceandenvironment, SOUTHWEST Petroleumuniversity, CHENGDU 610500, china, 3.TUHA Petroleumexplorationanddevelopmentheadquartersofcnpc, TURPAN 838000, china
Pages: 139-143
Year: 2008 Issue:  2
Journal: Journal of Chengdu University of Technology
Keyword:  油田溶解气;  油气比;  分子扩散;  Fick定律;  吐哈盆地;
Abstract: 通过对吐哈盆地台北凹陷红南-连木沁油田的中、上侏罗统和白垩系油藏溶解气组成在纵向上的分布特征分析,认为大约在埋深小于1 450 m的白垩系油藏溶解气扩散作用强烈,不仅使甲烷含量显著降低,乙烷、丙烷等组分含量相对升高,而且也降低了溶解气油比,扩大了油藏的地饱压差。根据Fick第二扩散定律,模拟计算白垩系油藏溶解气中甲烷从中新世后期到第四纪末期扩散作用的累计散失率为82%。