铸体薄片资料刻度测井解释孔隙度精度——以川科1井马鞍塘组储层为例  

Casting Thin-section Data for Identifying Porosity Accuracy Interpreted by Well Logging:An Example from Maantang Formation of Chuanke 1 Well

作　　者：王燕[1] 冯明刚[1] 熊治富[1] 程斯洁[1] 王伟克[1] 

机构地区：[1]中国石化勘探南方分公司研究院,四川成都610041

出　　处：《天然气技术与经济》2011年第4期26-28,40,共4页Natural Gas Technology and Economy

摘　　要：川西孝泉—新场构造川科1井马鞍塘组储层未取得岩心分析资料,难以应用岩心分析孔隙度刻度测井解释孔隙度精度,这给判别测井解释孔隙度是否精确带来了难题。因此,探索性地选取川科1井马鞍塘组地层的岩屑进行铸体薄片分析,然后对比铸体薄片分析得出的矿物百分含量与测井解释得出的相应矿物含量进行误差分析,定性判别测井解释孔隙度是否被准确求取。铸体薄片分析的矿物含量和测井解释的平均误差为1.93%,相对误差为2.35%,说明测井解释误差较低。实践证明,用铸体薄片分析资料刻度测井解释孔隙度精度是可行的。In Chuanke 1 well of Xiaoquan-Xinchang structure,no core were sampled from Maantang Formation.So,porosity can not be obtained from core analysis,resulted in a difficult identification of porosity accuracy interpreted by well logging.In this study,some cuttings are chosen from the formation and used for a casting thin-section analysis at first;and then,the percent content of main minerals gained from this analysis and the corresponding mineral content gain from well-logging interpretation are contrasted;thirdly,the error between these two is analyzed to identify porosity accuracy interpreted by well logging.Results illustrate that:(1)a mean error of mineral content from both thin-section analysis and well-logging interpretation is 1.93;and(2)an average error is 2.35%;(3)an error from well-logging interpretation is very low.In addition,practices also show that it is feasible to use casting thin-section data to identify porosity accuracy interpreted by well logging.

关 键 词：交会法 孔隙度 铸体薄片 马鞍塘组 四川 西 

分 类 号：P631.84[天文地球—地质矿产勘探]