鄯善丘陵交界区域油水关系研究

发布时间：2018-02-14 15:36

  本文关键词： 构造 地层特征 沉积微相 砂体 水淹 储量　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：在大量消化前人文献和资料的基础上,查明了研究区构造的总体特征;结合三维地震资料,对研究区断裂系统的组合及断裂要素进行了统计,共整理出45条断层的性质和特征。利用井位分层数据完成了三间房组(J2s)顶部和J2s31顶部构造图,识别出了26个圈闭,并对圈闭要素进行了统计。对研究区中侏罗统三间房组地层特征进行了精细对比,识别出2个油组、5个砂组、16个小层及25个单层,编制了29条联井对比剖面,编制了地层分层数据体;并在此基础上建立了砂层分层数据体;编制了地层等厚图及单层砂体厚度等值线图,分析了地层和砂体的展布特征和规律。对沉积微相类型与特征进行了研究,研究区主要发育辫状河三角洲相和少量的湖泊相,辫状河三角洲相主要发育平原和前缘亚相、湖泊相发育滨浅湖亚相。研究区识别微相类型11种,对其特征进行了系统论述。并建立了沉积微相数据体。对研究区油水关系进行了深入研究,通过29条油藏联井对比剖面图的剖析,发现丘陵-鄯善交界区三间房组油水分布主要受到构造的控制,构造的高部位是油气主要的聚集场所,只是后期的断层破坏使得该区的油水关系变得十分复杂。在构造分析、沉积相的展布和油水关系研究的基础上,充分利用工区内试油、取心、生产等资料,制定了符合本研究区的孔渗模型和油水判别标准,通过对区内110口井的测井二次解释,共确定了19井层拟上返井,再从构造、沉积相、油水关系和邻井对比等几方面论证,最终确定出4井层作为优先上返井层,12井层次优油层和3井层油水同层作为接替上返井层。
[Abstract]:On the basis of digesting the previous literatures and data, the general characteristics of the structure in the study area are found out, and the combination and the fault elements of the fault system in the study area are analyzed in combination with the three-dimensional seismic data. The properties and characteristics of 45 faults have been sorted out. Using the stratified data of well location, the top structure map of J2s and J2s31 has been completed, and 26 traps have been identified. The stratigraphic characteristics of the Sanjianfang formation of the Middle Jurassic in the study area have been carefully correlated. Two oil groups, five sand formations, 16 sub-layers and 25 single layers have been identified, and 29 correlation sections have been compiled. The stratigraphic stratification data body is compiled, and the stratigraphic stratification data body is established on the basis of which, and the formation isopacity map and the single layer sand body thickness isoline map are compiled. The types and characteristics of sedimentary microfacies are studied. The braided river delta facies and a few lacustrine facies are mainly developed in the study area, while the braided river delta facies mainly develop plain and front subfacies. The lacustrine facies is developed into littoral subfacies. Eleven types of microfacies are identified in the study area, and their characteristics are systematically discussed. The sedimentary microfacies data body is established. The relationship between oil and water in the study area is deeply studied. Based on the analysis of 29 reservoir correlation profiles, it is found that the distribution of oil and water in Sanjianfang formation is mainly controlled by the structure, and the high part of the structure is the main accumulation place of oil and gas. It is only because of late fault failure that the oil-water relationship in this area becomes very complicated. On the basis of structural analysis, distribution of sedimentary facies and study of oil-water relationship, the data of oil testing, coring and production in the working area are fully utilized. In accordance with the pore and permeability model of the study area and the criteria for distinguishing oil and water, through the second interpretation of the logging of 110 wells in the area, 19 wells are determined to return to the well, and then proved from the aspects of structure, sedimentary facies, oil-water relationship and the correlation of adjacent wells, etc. Finally, 4 well layer is selected as the preferred back well layer, and 3 well oil and water layer is selected as the replacement of the upper return well layer.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13
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本文编号：1511031