D指数在泥岩裂缝储层解释中的应用  

APPLICATION OF D INDEX IN MUD STONE FRACTURE RESERVOIR INTERPRETATION

作　　者：李守田[1] 汪玉泉[1] 袁伯琰[1] 

机构地区：[1]大庆油田有限责任公司地质录井分公司,黑龙江大庆163411

出　　处：《大庆石油地质与开发》2001年第5期15-16,共2页Petroleum Geology & Oilfield Development in Daqing

摘　　要：D指数也称地层可钻性指数 (无量钢 )。在正常地层压力梯度下 ,随着地层埋藏深度的增加 ,地层可钻性变小 ,但在钻遇泥岩超压层时 ,地层可钻性出现了异常变化 ,利用这一特征 ,D指数可用于钻井过程中泥岩超压层的预测。当泥岩裂缝发育时 ,这种地层同样表现出相对压力高和可钻性的特点。因此 ,在完井后经过对D指数资料的重新回放处理 ,并结合气测异常显示 ,可以按裂缝的发育程度对裂缝型储层进行小层细分 ,这对于优选试油井段。D index is also called formation drillability index (dimensionless). In normal formation pressure gradient, with the increase of formation burial depth, formation drillability decreases. However, formation drillability may change abnormally when shale super pressured formation is drilled. Using this characteristic, D index can be used in the prediction of shale super pressure formation in the process of drilling. When shale fractures develop, they also appear as relative high pressure and drillability. Therefore, through a re playback processing of D index data after completion, and combining with gas testing abnormality appearance, fractured reservoirs can be subdivided according to the development of the fractures.

关 键 词：D指数 泥岩裂缝储层 解释评价 地层可钻性指数 地层压力梯度 

分 类 号：TE321[石油与天然气工程—油气田开发工程]