塔河油田四区奥陶系碳酸盐岩油藏中的缝合线研究  

Research of Stylolites in Ordovician Carbonate Reservoirs of the 4th Block,Tahe Oilfield ilfield,Tarim Basin

作　　者：钟建华[1,2] 孔凡亮[1] 李阳[3] 袁向春[3] 高玉飞[2] 梁刚[2] 艾合买提江.阿不都热和曼 陈鑫[2] 牛永斌[2] 王培俊[2] 

机构地区：[1]中国科学院广州地球化学研究所,广州510640 [2]中国石油大学(华东)资信学院,山东东营257061 [3]中国石化集团公司,北京100825

出　　处：《地质论评》2010年第6期841-850,共10页Geological Review

基　　金：973计划项目"碳酸盐岩缝洞系统发育规律的研究"(课题编号2006CB202401)的成果

摘　　要：塔里木盆地是我国的重要油气勘探区和产区,但是到目前为止,对塔河油田碳酸盐岩缝洞系统还认识不足,因而严重地影响了塔河油田的勘探开发。通过研究发现,塔河油田奥陶系碳酸盐岩油藏中的裂缝系统非常复杂,主要有两类裂缝:一种是构造裂缝;另一种是缝合线。前人认为前者重要,而忽略后者;而笔者等认为后者比前者更加重要。塔河油田奥陶系碳酸盐岩油藏中的缝合线非常发育,其频度是与石油成藏有一定关系的非构造裂缝所能及。根据缝合线与层面的关系,可以将塔河油田的奥陶系碳酸盐岩油藏中的缝合线分为三种:顺层缝合线、倾斜缝合线和竖直缝合线。这三种缝合线彼此交织成复杂的网络系统,构成了储层内部油气运移的最初级良好通道,同时与裂缝一起构成了有效的油气运移通道和压裂的弱结构面,为油气成藏和后期的开发创造了良好的条件。Tarim Basin is an important district in China’s oil and gas exploration and production, but so far, there is inadequate understanding of the carbonate fissure system of the Tahe oilfield, which has seriously impaired exploration and development of this oilfield. As we have stduied, the fissure system of the Tahe oilfield in its Ordovician carbonate reservoir is very complex. Basically there are two types： tectonic fissures, and stylolites. Many predecessors considered that the former is vital and often ignore the latter, whereas we think the latter is more important than the former. Stylolites are widely developed within the Ordovician carbonate reservoirs of the Tahe oilfield, and tectonic fissures can not be matched with the stylolites in terms of frequency or their relationship with oil. According to the relationship between stylolites and bedding, stylolites in the Ordovician carbonate reservoirs of the Tahe oilfield can be divided into three kinds： bed-parallel stylolites, tilted stylolites, and vertical stylolites. These three kinds are associated and form complex network systems which constitute the primary internal hydrocarbon migration passages within the reservoir. At the same time, together with the fissures, they construct an effective hydrocarbon migration channel and a weak structural plane that can create favorable conditions for both hydrocarbon accumulation and subsequent development.

关 键 词：缝合线 油气 奥陶系 塔里木盆地 

分 类 号：P618.13[天文地球—矿床学]