鄂尔多斯盆地清泉区延长组裂缝探讨  

FRACTURE RESEARCHES OF YANCHANG FORMATION IN QINGQUAN BLOCK OF ORDOS BASIN

作　　者：王乃军[1,2] 冯志朋[3] 奕贝贝 

机构地区：[1]西安石油大学油气资源学院,陕西西安710065 [2]西北大学大陆动力学教育部重点实验室和地质学系,陕西西安710069 [3]大庆油田有限责任公司测试技术服务分公司,黑龙江大庆163511 [4]陕西延长石油集团股份有限公司,陕西延安716100

出　　处：《大庆石油地质与开发》2010年第6期50-54,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：基金项目：陕西省自然科学基础研究计划项目（2009JM5002）资助.

摘　　要：通过岩心观察、薄片观察和测井资料解释，在清泉区发现了大量的裂缝。这些裂缝在各个层位均有分布，在长3油层组分布最多，占全部发现裂缝的41．79％；长6油层组和长（4＋5）油层组裂缝发育相对较少，占全部发现裂缝的58．21％。研究发现裂缝主要发育在砂岩中，而在泥岩中很少发育。通过研究裂缝的产状，结合构造演化史，最终确定清泉区裂缝是印支构造期产生的，之后的燕山和喜马拉雅构造期对其具有一定的改造。裂缝与油气运移的时空配置良好，可以成为油气运移的重要通道。By the observations of drilled cores and rock slices and log interpretations, a great number of fractures is found in Qingquan area. And moreover these fractures are vastly distributed in each layer, especially mainly in Chang No. 3 oil layer, occupying 41.79% of the totally discovered fractures; next are in Chang No. 6 oil layer; but relatively seldom in Chang No. （4 ＋5 } oil layer group, occupying 58.21% of the total. It is found from the study that the fractures are well-developed in the sandstone and seldom in the mudstone. By studying the occurrences of these fractures and the history of structural evolution, the fractures in Qingquan block are generated in Indo-Chinese epoch, and then Yanshan and Himalayan epochs structural movements still possess a certain alteration. Due to the much better time-space matching relationship between the fractures and petroleum migration, these fractures can be the important channels of hydrocarbon migration.

关 键 词：裂缝 延长组 清泉区 鄂尔多斯盆地 

分 类 号：TE122.12[石油与天然气工程—油气勘探]