油层含油性判别分析

大安寨油组是川中油田的主力产油层,油气多产于碳酸盐岩地层,开采时间较长,不少井产量下降,甚至枯竭,因而研究大安寨油井含油特征、预测产能是十分必要的。根据试油井段的产能分析,将储层分为干层、低产层和高产层三类;应用测井、地质及试油试采资料,归纳出不同类型产层的定性特征;并建立起判别产层的模型,形成一套选取产层和预测产能的方法。

THE STUDY OF THE OIL-BEARING CHARACTERISTICS OF DA’ANZHAI OIL RESERVOIR

Da’anzhai oil reservoirs are the chief production zones of Chuanzhong oil field. Most of oil and gas are from the Da’anzhai carbonate formation. With the long time past, the out-put decreases and some wells are even exhausted. So it is much necessary to study the oil-bearing characteristics and predict the output. In the paper, the reservoirs are classified into threetypes by oil productivity: dry zones, low production zones and high production zones. The qualitative characteristics of the dif-ferent types are reduced according to the information of well logging, geology and production test, and the models of produc-tion formation are set up. Eventually, the methods are formed,which is used to select pay zone and predict the productivity.