YZ油区长4+5~2高自然伽马砂岩含油性特征及测井识别  

作　　者：幕丹 张席琴 罗丹[1] 李祖平[1] 郑艳忠 

机构地区：[1]延长油田股份有限公司志丹采油厂

出　　处：《国外测井技术》2017年第2期25-27,2,共3页World Well Logging Technology

基　　金："十一五"国家科技支撑计划(2007BAB170)资助

摘　　要：针对鄂尔多斯盆地YZ油区长4+5~2存在的高自然伽马砂岩储层,分析了高伽马砂岩储层的测井响应特征,认为研究区高伽马砂岩储层具有高自然伽马、与自然电位负异常不匹配、高声波时差、低电阻率的测井曲线特征,且高伽马砂岩储层中存在相对低电阻率油层、相对高电阻率水层,致使研究区油层、水层难以识别。通过测井曲线重叠图技术和多重参数构建交会图技术,可快速有效对高伽马砂岩的含油性进行判别。Taking the Chang 4+5~2 Member high natural gamma ray reservoirs as study object in YZ oil zone, the log characteristics ofthis kind of reservoirs are analyzed. The results show that high gamma ray reservoir has higher logging value of GR, AC, lower value of DEN, and do not match with negative anomalies of SP curve. Besides, there is relatively low resisivity reservoir and relatively high resistivity aquifer in the high gamma sandstone, which make it difficult to identify the oil reservoir. It is proved that the oil-bearing of high gamma sandstone can be discriminated quickly and effectively by crossplot technique using multiple parameters and logging curve overlay technique.

关 键 词：高自然伽马砂岩 四性关系 测井响应 测井曲线重叠图 交会图 

分 类 号：P618.13[天文地球—矿床学]