红河油田延长组长8段油气输导体系及运聚模式  

Petroleum carrier systems and migration and accumulation patterns in Chang8 member of Yanchang Formation in Honghe oilfield

作　　者：贾京坤[1] 尹伟[2] 邱楠生[1] 陈纯芳[2] 周末[1] 缪巍[1] 

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石化石油勘探开发研究院,北京100083

出　　处：《油气地质与采收率》2016年第2期9-15,共7页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"中西部重点碎屑岩领域油气富集规律与分布预测"(2011ZX05002-006)

摘　　要：综合地质、录井、测井及地震解释等资料,对红河油田上三叠统延长组主要油气输导体系(包括输导层及断裂)进行研究,分析油气输导体系发育特征及其在油气成藏关键时期的控制作用。利用盆地模拟方法,恢复研究区油气成藏关键时期的古动力,结果表明,在延长组长8段沉积时期研究区处于超压系统,且超压是油气运移的主要古动力。在延长组油气输导机制及油气运聚规律分析的基础上,确定在超压系统内长8段油气输导体系是由有效输导断裂及与其连通性良好的输导层共同构成的断—缝—砂输导体系。油气优势运移方向为沿压力差方向向有效低势区聚集,具有侧向封闭条件或物性"甜点"以及有效低势区的岩性或构造-岩性圈闭是研究区下步的有利勘探目标。Based on comprehensive analysis of geological data,well logging and seismic interpretation,the main carrier systems(including sand bodies and faults)in the Yanchang Formation in Honghe oilfield were studied,and the characteristics of carrier systems and their important effect on hydrocarbon accumulation were analyzed. By the method of basin simulation,the palaeodynamics generated at the key period of hydrocarbon reservoiring were recovered in this area. The results obtained show that the reservoirs of Chang8 member in Yanchang Formation were situated in an overpressured system during the key reservoiring period,and the overpressure became the main driving force for hydrocarbon migration. Based on the analysis of petroleum migration mechanism and migration and accumulation regularities in Chang8 member,it is determined that the carrier system is composed of effectively connected active faults and carrier beds,which makes a composite fault-fracture-sand carrier system. Oil and gas migrates along the direction of pressure drop and entrapped in effective low potential zone. The next favorable exploration targets are lithologic and structural-lithologic traps with better lateral sealing conditions or physical property'sweet point'and effective low potential.

关 键 词：延长组 输导体系 超压驱动 运聚模式 红河油田 

分 类 号：TE112.12[石油与天然气工程—油气勘探]