地层抬升剥蚀对油气成藏的促进作用  

PROMOTION OF STRATA UPLIFT AND EROSION TO HYDROCARBON ACCUMULATION

作　　者：田丰华[1,2] 姜振学[1,2] 

机构地区：[1]中国石油大学盆地与油藏研究中心,北京昌平102249 [2]中国石油大学石油天然气成藏机理教育部重点实验室,北京昌平102249

出　　处：《西南石油大学学报（自然科学版）》2008年第5期37-40,共4页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家自然科学基金项目(40372071;40472078)

摘　　要：地层抬升剥蚀过程对于油气成藏的影响不仅表现为破坏性,还有建设性作用。研究认为地层抬升剥蚀过程中温度降低、砂体回弹及不均衡剥蚀造成的区域性水流等因素形成的异常低压,为油气运移聚集提供了动力;剥蚀卸载过程中的砂体回弹可为油气聚集提供更多的空间,实验表明:天然岩芯的回弹量最大可达1%;地层抬升剥蚀将地层暴露至地表,在风化剥蚀及地表水的淋滤作用下,其储集性能将会得到很大的改善。研究了地层抬升剥蚀与油气成藏的匹配关系,认为地层抬升剥蚀很可能是油气成藏的机理之一。Strata uplift and erosion destroy not only the existed accumulation,but also promote hydrocarbon migration and accumulation.The abnormally low pressure caused by temperature falling,sandstone rebounding and regional fluid flow due to imbalance erosion during the process of strata uplift and erosion,provides energy for the oil and gas to migrate and accumulate,the sandstone rebounding due to strata erosion offers more pore spaces for oil and gas accumulation,and the physical experiment shows that the amount of sandstone rebounding can be up to 1%,the rocks exposed to atmosphere are affected by weathering and leaching process,which will improve characteristics of accumulation.So,strata uplift and erosion should be one of the oil and gas accumulation mechanisms.

关 键 词：砂体回弹 成藏机理 低压油气藏 地层剥蚀 地层抬升 

分 类 号：TE112[石油与天然气工程—油气勘探]