济阳坳陷胜二区古近系沙河街组二段8砂组三角洲砂体储层构型分析  

Reservoir Architecture of Lacustrine Delta Sandbody: A Case Study from the 8 Sandgroup of Paleocene Shahejie Formation Member 2 of Shenger Block of Shengtuo Oil Field,Jiyang Depression,East China

作　　者：张友[1,2,3] 侯加根[3] 沈安江 贾俊山[4] 段冬平 

机构地区：[1]中国石油杭州地质研究院,浙江杭州310023 [2]中国石油集团碳酸盐岩储层重点实验室,浙江杭州310023 [3]中国石油大学(北京)地球科学学院,北京102249 [4]中国石化胜利油田地质研究院,东营257000 [5]中海石油(中国)有限公司,上海200030

出　　处：《延安大学学报（自然科学版）》2015年第2期8-13,共6页Journal of Yan'an University：Natural Science Edition

基　　金：国家科技重大专项(编号2008ZX05004-002);国家油气专项(2011ZX05004-002);中国石油天然气股份有限公司重大科技专项(2014E-32);中国石油天然气集团公司碳酸盐岩储层重点实验室资助

摘　　要：在储层构型方法指导下,以取心井岩心和密井网测井资料为基础,借鉴现代沉积、野外露头成果,结合生产动态数据,综合多学科理论与研究成果,对胜坨油田二区沙二段8砂组密井网条件下的三角洲砂体开展了精细的储层内部构型逐级解剖,并探讨了基于构型单元储层质量分布模式。主要取得以下成果及认识:在河口坝复合体叠置样式研究基础上;按照"垂向细分"、"侧向划界"以及"平面组合"的思路,进行单一河口坝构型单元的识别划分;将研究区河口坝划分为限制性河口坝(PMB)和非限制性河口坝(DMB)。完善了单一河口坝构型模式研究,深化单一坝边界识别标志;建立了两种单一河口坝砂体内夹层分布模式。限制性单一河口坝内部夹层以泥质夹层为主,局部物性夹层,近水平状展布,将单一坝分为多期增生体;非限制性单一河口坝砂体内部增生体间的夹层以物性砂岩及钙质夹层为主,多分布在河口坝中上部,连续性较差。明确了隔夹层类型由陆向湖盆的演化规律:钙质砂岩→物性夹层→泥灰岩。基于构型单元的储层质量分布模式表明,单一构型单元分布控制着储层参数的平面展布。坝主体以发育Ⅰ类、Ⅱ类储层为主,Ⅲ类储层一般发育在河口坝内部夹层的遮挡区以及坝侧缘,Ⅳ类储层发育在席状砂。Guided by reservoir architecture theory,based on drill core and dense well logging data,learned from modern sedimentology,outcrop results,and dynamic production data,systematically study of reservoir sedimentary characteristics and delta sandstone configuration anatomy of 8 sand group of Es2 in Shenger Block was carried out,and reservoir quality distribution pattern of different configuration units was analyzed. The mainly achievements are as follows. On the analysis of complex mouth bars overlay style,in accordance with the principle of vertical subdivision,lateral demarcation and flat combination,configuration of single origin sand body（ single mouth bar） was identified. Mouth bars of the study area can be classified into proximal mouth bar（ PMB） and distant mouth bar（ DMB）. Architecture patterns of single mouth bar are improved,and boundary of single mouth bar is more clearer.Interlayer distribution patterns of two kinds of single mouth bar sand body are created. Interlayers of PMB are dominated by clay,physical interlayer locally distributed; single mouth bar is divided into multi- proliferation body by approximately horizontal interlayers. Interlayers of DMB are dominated by physical and calcite interlayers,which are distributed mainly in the middle- up of the mouth bar,with poor continuation to the foreset. It is revealed that evolution of interlayer types from land to the basin are calcite sandstone interlayer,physical interlayer,and marl interlayer. Reservoir quality distribution pattern of different configuration units indicates that single configuration unit controls reservoir parameters plane distribution. The center of mouth bar is dominated by class I and class II reservoirs. Class III reservoir is generally distributed in the shielding area of mouth bar interlayer and bar edge,with Class IV reservoir in sand sheet.

关 键 词：胜坨油田二区 三角洲相砂体 储层构型 储层质量 

分 类 号：P534.5[天文地球—古生物学与地层学] TE122.23[天文地球—地质学]