利用常规测井资料评价致密砂砾岩储层有效性的方法研究——以准噶尔盆地西北缘沙湾凹陷百口泉组为例  

Method to evaluate the effectiveness of tight glutenite reservoirs using conventional well logging:a case study on the Baikouquan formation of Shawan depression in northwestern margin of Junggar basin

作　　者：胡婷婷[1] 李静[1] 余海涛[1] 贾春明[1] 肖亮[2] HU TingTing;LI Jing;YU HaiTao;JIA ChunMing;XIAO Liang(Research Institute of Geophysical,Research Institute of Exploration and Development,PetroChina Xingjiang Oilfield Company,Ürümqi 830013,China;School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China)

机构地区：[1]中国石油新疆油田分公司勘探开发研究院地球物理研究所,乌鲁木齐830013 [2]中国地质大学(北京)地球物理与信息技术学院,北京100083

出　　处：《地球物理学进展》2021年第6期2462-2471,共10页Progress in Geophysics

基　　金：国家自然科学基金项目“致密油储层孔隙结构定量表征及含油性评价研究”(41302106)资助。

摘　　要：以准噶尔盆地西北缘沙湾凹陷百口泉组试油资料为基础,将储层划分为三种类型.在分析了每一类储层及泥岩层的常规测井响应特征的基础上,提出了对百口泉组储层有效性划分较敏感的参数:密度测井计算孔隙度φ_(ND)以及中子-密度测井计算视石灰岩孔隙度差φ_(ND).在此基础上,建立了基于φ_(ND)与φ_(ND)交会的储层有效性评价图版.试油层段的实际资料处理结果显示,图版的符合率达到80%.利用该评价图版,对目标区域开发井中钻遇百口泉组的实际测井资料进行了处理,以预测储集层的有效性.结果表明,预测的储层类型与试油结果具有很好的一致性,充分证实了本研究提出方法的可靠性.Based on the Drill Stem Test(DST)data acquired from the Baikouquan Formation of Shawan depression in northwestern margin of Junggar basin,the Baikouquan formation is classified into three types.After the conventional log responses of every type of formation and mudstone are analyzed,parameters that are sensitive to classify the effectiveness of tight glutenite reservoirs are exxtracted.These parameters are the porosity predicted from the density(φ_(ND))and the neutron-density apparent porosity divergence of limestones(φ_(ND)).In addition,a crossplot ofφ_(ND)versusφ_(ND)is proposed to predict the effectiveness of tight glutenite reservoirs.The coincidence rate of this corssplot reaches to 80%.By using this proposed method,several wells were processed to predict the effectiveness.Comparison of predicted results and DST data illustrates that they coincide with each other very well.The reliability of the proposed method is verified.

关 键 词：致密砂砾岩 有效性评价 中子-密度测井计算视石灰岩孔隙度差 交会图 

分 类 号：P631[天文地球—地质矿产勘探]