方解石的润湿性对胶结指数m影响的实验研究  

Experimental study on influence of wettability of calcite on cementation index m

作　　者：张丽华[1] 李庆峰 单刚义[1] 李洪征 潘保芝[1] 许凤鸣 ZHANG Lihua;LI Qingfeng;SHAN Gangyi;LI Hongzheng;PAN Baozhi;XU Fengming(College of Geo-exploration Science and Technology,Jilin University,Changchun 130026,China;Daqing Branch Company of CNPC Logging,Daqing 163000,Heilongjiang,China;Daqing Oilfield Exploration Division,Daqing 163000,Heilongjiang,China)

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]中国石油集团测井有限公司大庆分公司,黑龙江大庆163000 [3]大庆油田勘探事业部,黑龙江大庆163000

出　　处：《世界地质》2023年第1期126-133,共8页World Geology

基　　金：国家自然科学基金项目(42072323)。

摘　　要：胶结指数是预测含水饱和度的重要参数之一。为了解方解石的含量和润湿性对胶结指数的影响,选取X地区Y油层4口井42块岩样进行了全岩分析和岩电实验。实验结果表明:方解石的润湿性和含量影响胶结指数m,其随着方解石含量的增大而减小。研究区方解石是油湿的,岩石油湿成分越多,其胶结指数越小。由于润湿性对电阻率影响较大,为得到准确的胶结指数m值,应在保留原位润湿性的岩心上进行电学测量。在计算含水饱和度时,应该充分考虑润湿性的影响。Cementation index is one of the important parameters for predicting water saturation.In order to understand the influence of calcite content and wettability on cementation index,forty-two rock samples from four wells in Y oil layer of X area were selected for whole rock analysis and rock electrical experiment.The experimental results show that the wettability and content of calcite affect the cementation index m,which decreases with the increase of calcite content.Calcite is oil wet in study area,and the more oil wet components of rock,the smaller its cementation index.Since wettability has a great influence on resistivity,in order to obtain accurate cementation index m,electrical measurement should be carried out on the core with in-situ wettability.When calculating water saturation,the influence of wettability should be fully considered.

关 键 词：方解石 润湿性 胶结指数 阿尔奇公式 岩电实验 

分 类 号：P578.6[天文地球—矿物学] P618.13[天文地球—地质学]