鄂尔多斯盆地姬塬地区长9成藏主控因素及成藏模式  

Mmn controlling factors and SRCA modes of Chang9 oil reservoir group in Jiyuan region of Ordos Basin

作　　者：张丹丹[1,2] 淡卫东[1,2] 张三[1,2] 朱静[1,2] 马文忠[1,2] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院 [2]低渗透油气田勘探开发国家工程实验室

出　　处：《低渗透油气田》2014年第2期19-23,111,共6页

摘　　要：鄂尔多斯盆地姬塬地区长9平面上多油藏发育但是规模较小，采用地质与地球化学相结合的方法，对该区长9成藏主控因素进行分析。为下步油藏预测及开发有利区优选提供依据。研究结果表明，长7烃源岩为该区长9提供了充足的油源：纵向上长7-长9期发育的裂缝与渗透性砂岩形成的良好立体配置，是长7油源向长9充注的有效运移通道；鼻隆构造和物性展布对油藏的分布和类型具有明显的控制作用，在西部物性好的地区，主要发育碧性-构造油藏，而在中东部物性相对较差的地区，主要发育岩性油藏。在此基础上，提出了“垂向多点式充注、横向扩展成藏、西部鼻隆控烃、东部岩性圈闭”的成藏模式，从机理上科学解释了长9油藏平面相对较小但多油藏分布的成因。In order to provide the basis for the oil reservoir forecast and optimiT-qtion of favorable areas for development in the next step, the method of combining geology with geochemistry is used to analyze the main controlling factors of SRCA in the Chang-9 oil reservoir group. Study results show that the source rock of Chang-7 oil reservoir group offers the sufficient oil sources for Chang-9 oil reservoir group, The fine three-dimensional config- uration formed by the permeable sandstone and the fractures longitudinally developed from Chang-7 to Chang-9 stages is the effective migration path of Chang-7 oil reservoir source charging into Chang-9 oil reservoirs. The structural nose and the physical property distribution have obvious control over the distribution and types of oil reservoirs, There were mainly ]ithologic - structural oil reservoirs developed in the westom ∽ans with good physical properties, while mainly lithologie oil deposits developed in the mid-and eastern re∽ons with relatively ∽ physical properties. On this ha- sis, the SRCA pattern of ＂vertical multipoint filling, horizontal expanding to form SRCA, westom noze-contralled hydrocarbon, and eastern lithologic traps＂ is proposed, and this scientifically explains on the mechanism why Chang-9 oil reservoirs are relatively small in-plane but widespread with multiple reservoirs

关 键 词：成藏主控因素 成藏模式 长9 姬塬地区 鄂尔多斯盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]