渤海海域新近系薄互层砂体沉积特征及定量预测  

Sedimentary Characteristics and Quantitative Prediction of Neogene Thin Interbed Sand-bodies in Bohai Sea Area

作　　者：曹龙 李超 秦润森 穆朋飞 张鹏志 CAO Long;LI Chao;QIN Runsen;MU Pengfei;ZHANG Pengzhi(Tianjin Branch,CNOOC(China)Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《西安石油大学学报（自然科学版）》2023年第2期16-24,共9页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项“渤海海域勘探新领域及关键技术研究”(2016ZX05024-003);中海油重大项目“渤海‘双高’油田挖潜技术研究”(YXKY-2018-TJ-04)。

摘　　要：为明确新近系明化镇组下段薄互层砂体的沉积特征与展布规律,运用岩心、钻井及三维地震资料,结合地震沉积学研究,确立了研究区薄互层形成于浅水三角洲前缘水下分流河道与前缘席状砂。基于波阻抗反演的井震标定发现,当薄互层形成一套砂层组时,地震最小振幅对其具有一定指示性。据此,将主要发育薄互层的明下段Ⅳ-2亚油组纵向划分为3套砂层组,并提取各砂层组地层切片,以确定其砂体边界与平面分布范围。最后以实钻砂层组储层厚度、地震属性值统计为数据基础,建立了薄互层储层定量预测拟合关系。在预测的厚度较大的甜点区实施评价井,验证了研究结果的可靠性。In order to clarify the sedimentary characteristics and distribution of the thin interbedded sand-bodies in the lower member of Neogene Minghuazhen Formation,using core,drilling and 3D seismic data,combined with seismic sedimentology research,it is determined that the thin interbeds are developed in the shallow delta front underwater distributary channel and front sheet sand of the study area.The well-seism calibration based on wave impedance inversion shows that when thin interbeds form a set of sand groups,the minimum seismic amplitude has a certain indication.Therefore,Ⅳ-2 oil-bearing formation in the lower member of Minghuazhen Formation,which mainly develops thin interbeds,is divided into three sets of sand groups vertically,and the stratigraphic slices of each sand group are extracted to determine the reservoir boundary and plane distribution range of each sand group.Finally,the quantitative prediction fitting relationship of thin interbedded reservoir is established based on the statistics of the actual drilling thickness and seismic attribute value of the sand groups.The reliability of the research result is verified by the evaluation well data in the dessert area with great predicted thickness of thin interbedded reservoir.

关 键 词：浅水三角洲沉积 薄互层储层 地震沉积学 定量预测 黄河口凹陷 

分 类 号：TE122.2[石油与天然气工程—油气勘探]