夹层自动识别方法  

A Method for Automatic Identification of Interbed

作　　者：辛治国[1,2] 冯伟光[2] 郭士博[2] 李路晨[3] 孙志刚[2] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]中国石化胜利油田有限责任公司地质科学研究院,山东东营257015 [3]中国石油大学资源与信息学院,北京102249

出　　处：《新疆石油地质》2010年第3期307-310,共4页Xinjiang Petroleum Geology

基　　金：国家重大科技专项(2008ZX05011-03)

摘　　要：提出了一套利用电性变化梯度自动识别夹层的方法,该方法利用夹层的电性特征与上下储集层有一定差异的特点,从而划分出夹层。然后计算夹层的自然伽马变化梯度、微梯度变化梯度、微电位变化梯度、微电极幅度差、声波时差变化梯度、井径变化梯度等参数,将这些参数归一化后绘制雷达图,发现泥质夹层具有高微梯度变化梯度、高微电位变化梯度、高井径变化梯度的特征;灰质夹层具有高声波时差变化梯度及低微电极幅度差的特征;物性夹层具有高微电极幅度差及低声波时差变化梯度的特征。在孤岛油田利用水平井挖潜夹层上部剩余油的过程中,利用这一方法取得了良好的生产效果。The petrophysical differences of above and below reservoirs of interbed can be used for identification of interbed,giving a series of parameters related to the interbed,including varied gamma-ray gradient,micro-inverse gradient,micro-normal gradient,minilog amplitude difference,acoustic travel time gradient,caliper log gradient,etc.,by which the relative plot can be made after normalization.It is indicated that the muddy interbed is characterized by high micro-inverse,high micro-normal and high caliper log gradients; the limy interbed by high acoustic travel time gradient and low minilog amplitude difference; and the silty mud interbed by high minilog amplitude difference and low acoustic travel time gradient.The application of this method to Gudao oil field indicates that good production effect has been obtained for remained oil recovery in the reservoir above the interbed by horizontal wells

关 键 词：夹层 识别 方法 测井曲线 储集层 

分 类 号：P631.84[天文地球—地质矿产勘探]