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.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
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.
关键词
裂缝
延长组
清泉区
鄂尔多斯盆地
fracture
Yanchang Formation
Qingquan Block
Ordos Basin
