鄂尔多斯盆地黄陵地区长6油层组流体过剩压力与油气运移研究  

Fluid overpressure and oil-gas migration in the Chang-6 pay zone of Huangling area,Ordos Basin

作　　者：雷俊杰[1,2] 吴颖 

机构地区：[1]延长油田股份有限公司,陕西延安716000 [2]西南石油大学地球科学与技术学院,四川成都610500 [3]西北大学地质学系,陕西西安710069

出　　处：《地质学刊》2017年第4期542-547,共6页Journal of Geology

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2011ZX05003-001);陕西省科技统筹创新工程计划项目(2012KTZB03-03)

摘　　要：随着鄂尔多斯盆地黄陵地区油气勘探的不断推进,加深长6油层组石油运移、成藏的认识对指导进一步的勘探开发十分必要。通过对黄陵地区延长组流体过剩的计算,以及运移通道、运移方向和长6油藏形成时油气运移特征的研究结果表明,黄陵地区长7油层组具有远大于长6油层组的过剩压力分布,两者之间过剩压力差平均为3.44 MPa,过剩压力差值为长7油气向长6油层组储层运移的主要动力。油气从长7烃源岩排出后,在过剩压力驱动下沿通道体系向优质砂体展布上倾方向孔隙剩余压力的减小方向运移,遇到合适的圈闭聚集成藏。With the development of oil-gas exploration in Huangling area, Ordos basin, the understanding of oil migration and accumulation in Chang-6 pay zone is increasingly necessary to guide the next step of oil exploration and development. Based on the calculation of excessive fluid in the Yanchang Formation in Huangling area, together with the research of migration pathway and direction, this paper studied the migration characteristics at the birth of Chang-6 pay zone. The results show that Chang-7 pay zone has a much larger overpressure distribution than Chang-6. The excess pressure difference is 3.44 MPa on average, which plays the main driving force for the reservoir migration from Chang-7 to Chang-6. Driven by the overpressure, the oil and gas discharged from the Chang-7 source rock, migrated along the channel system to the reduction direction of the pores residual pressure in the high-quality sand body, and accumulated in suitable traps.

关 键 词：流体剩余压力 油气运移 长6油层组 黄陵地区 鄂尔多斯盆地 

分 类 号：P618.130.2[天文地球—矿床学]