【作者】 王静；

【导师】 国景星；

【作者基本信息】 中国石油大学 ， 矿产普查与勘探， 2009， 硕士

【摘要】 本文以沉积学、高分辨率层序地层学以及储层层次界面理论为指导,充分利用岩心、粒度分析、测井及数字处理成果等,在前人划分的体系域、准层序组的基础上,采用“等高程沉积时间单元对比法”、“旋回对比,分级控制”方法实现小层及单砂层的划分与对比,并以层次界面理论为指导进行单砂层内部成因体的识别、划分与对比。通过以上环节将研究区沙河街组沙二段7、8砂层组的7个小层划分为20个单砂层,并将8个重点砂层划分为18个成因体。在此地层格架内,将研究区沉积体划分出7种结构要素:水下分流河道、水下天然堤、废弃河道、分流间湾、河口坝、远砂坝、三角洲泥。其中,将河口坝进一步细分出5个次级结构要素:坝顶、坝主体、坝缘、坝间和坝侧翼。并对结构要素平面及垂向组合特征进行研究,总结出该区储层结构要素的空间组合类型。同时,深入研究了区内储层的平面、层内、层间、微观非均质性。在此基础上,采用流动分层指数法,建立了研究区沙二段7、8砂层组流动单元划分标准,据此将研究区各单砂层、成因体划分为四类流动单元,并研究了各储集体流动单元的平面分布特征。更多还原

【Abstract】 In this paper,with the guiding of sedimengtology,high resolution sequence stratigra phy and the theory of reservoir hierarchuy interface,made full use of core,grading analys -is,well logging and its digital process outcome and so on.on basis of the predecessor who divided the area into system tracts,parasequence sets,the mathod of“isobath time quautum contrast”and“cyclic contrast,step control”are adopted to fulfill the division and description of fine strata and monosandbody.and take the theory of hierarchuy interface as the instruction to distinguish,divide and contract causal body inside mono-sandbody.From the link above,divided the seven fine stratas of Es27 and 8 in this area into 20 monosandbodies,and further divided 8 main monosandbodies into 18 causal bodies. Inside this stratigraphic framework,divided the deposite in the area into 7 structural elements:underwater distributary channel,underwater natural levee,abandoned channel,interdistributary bay,estuary dam,distal bar and delta mud. Thereamong,on the basis of the differences of position,thickness of sand layer and physical properties,further divided estuary dam into 5 substructural elements: damtop,main dam,dam edge,interbar,dam laterl wing.and researched the characteristics of structural elements in horizon and vertic .and summarized their spatial organization types. at the same time,intensivly studied horizontal,interlayer,intralayer and microscale heterogeneity of reservoirs in the area.In this foundation, adopted the method of FZI to set up the divided standard for flow unit of Es27 and 8 of this area,hereby, divided the monosandbodies and causal bodies into four types of flow unit,and studied the regional dist-ribution characteristic of the reservoir flow units.更多还原