碳酸盐岩复杂孔隙结构的测井识别和分类评价——以中东某油田H地层为例  

Pore Structure Recognition and Classification Evaluation of Complex Carbonate Reservoirs by Using Logging Data——By Taking H Formation of An Oilfield in the Middle East for Example

作　　者：倪国辉 郭海峰 徐星 黄大琴 

机构地区：[1]中国石油长城钻探工程公司解释研究中心,北京100101

出　　处：《石油天然气学报》2014年第1期60-65,6,共6页Journal of Oil and Gas Technology

基　　金：中国石油天然气集团公司科学研究与技术开发项目(2011D-4101)

摘　　要：中东某油田H地层是一套发育在台地边缘的生物碎屑灰岩,孔隙结构复杂。综合应用铸体薄片、扫描电镜、毛细管压力等分析化验资料,对生物碎屑灰岩的微观孔隙结构特征进行了岩石物理分类,并对不同类型孔隙结构的电成像测井资料(FMI)和核磁共振(CMR)测井资料进行了特征研究,识别出不同类型孔隙结构在测井上的响应特征,建立了H地层孔隙结构和储层类型的测井识别评价图版,并对不同沉积相的储层类型进行了预测和评价。研究结果表明:微裂缝和大孔洞发育会使储层品质变好,而胶结作用使储层品质变差;潟湖相和滩后相的生物碎屑粒泥灰岩晶体大小均匀,分选好,粒间孔隙发育,容易形成好储层;而滩相的生物碎屑似球粒灰岩颗粒较大,分选较差,粒内孔隙发育,连通性差,不易形成好储层;潟湖相和滩后相的生物碎屑粒泥灰岩是下一步储层横向预测的有利区。H Formation in an oilfield in the Middle East was a set of bioclastic limestones with complex pore structure.By integrally using the data of casting thin sections,scanning electron microscope(SEM)and capillary pressure curves,rock physical classification was made on the micro-pore structure of bioclastic limestone,the characteristics of FMI and CMR data from different micro-pore structures were studied,their logging response characteristics were identified and a chart board for logging identification of different pore structures and reservoir types was established for H Formation,by which the reservoir types of different sedimentary facies were predicted and evaluated.The result shows that micro cracks and big vug development would bring good reservoir quality,while cementation would induce poor reservoir quality.In lagoon facies and post-shoal facies,rock types are bioclastic wackestones with fine grain size,good sorting and interparticle pore development,where good reservoir is developed.In shoal facies,rock types are mainly bioclastic pelletal limestone with big grain size,poor sorting,intraparticle pore development and the poor pore connectivity,where the reservoir quality is not good.Bioclastic wackestone deposited in lagoon facies is a beneficial area for lateral reservoir prediction.

关 键 词：碳酸盐岩 孔隙结构 电成像测井 核磁测井 储层分类 

分 类 号：P618.13[天文地球—矿床学]