辽河西部凹陷稠油成藏机制及深化勘探方法探讨  

An approach to heavy oil accumulation mechanism and in-depth exploration in western Liaohe depression

作　　者：蔡国刚[1,2] 鞠俊成[2] 

机构地区：[1]中国矿业大学,北京100083 [2]中油辽河油田公司,辽宁盘锦124010

出　　处：《特种油气藏》2010年第4期35-38,共4页Special Oil & Gas Reservoirs

摘　　要：辽河坳陷西部凹陷油气资源十分丰富,其中稠油约占总储量的68%。对该区稠油地球化学特征进行综合分析,认为其成因主要包括生物降解作用、水洗氧化和油气运移过程中的轻质组分散失。油藏类型主要为构造、地层、潜山及复合型稠油油藏,平面上主要分布于凹陷东西两侧斜坡的中上台阶。稠油分布受主干断裂发育、有利构造岩相带、区域不整合、盖层发育特征等因素的控制。通过整体构造形态落实及构造演化史分析、沉积微相和储层展布研究、不整合面封堵性分析,确定潜在稠油油藏的分布范围,实现稠油的深化勘探。The western Liaohe depression is very rich in oil and gas resources,with heavy oil accounting for about 68% of the OOIP.The geochemical characteristics of the heavy oil in this area indicate that biodegradation,bathing-oxidation and the loss of light component during oil and gas migration had contributed to heavy oil genesis.The reservoir types mainly include structural,stratigraphic,buried hill and complex reservoirs,mainly distributed on the middle-upper steps on the east and west slopes of the depression.Heavy oil distribution is controlled by main faults,favorable tectonic facies,regional unconformity,and caprock,etc.The distribution of potential heavy oil reservoirs are delineated through analyses of tectonic geometry,structural evolution,sedimentary facies,reservoir distribution,and unconformity seal capacity,to realize in-depth exploration for heavy oil.

关 键 词：辽河西部凹陷 稠油 地化特征 生物降解 成藏机制 

分 类 号：TE122.1[石油与天然气工程—油气勘探]