【作者】 秦文龙；

【导师】 苗建宇；

【作者基本信息】 西北大学 ， 地球探测与信息技术， 2012， 博士

【摘要】 本论文以鄂尔多斯盆地旦八油区长4+5储层为研究对象,综合运用现代精细油藏描述、油藏动态分析、油藏工程、数值模拟和采油工程等理论和方法,通过动静态相结合对研究区沉积微相、微构造、储层特征、地质储量、剩余油分布规律及挖潜做了详细、深入研究,完善与发展了一套针对鄂尔多斯盆地岩性油藏剩余油分布及挖潜研究的技术思路和方法,并为同类油藏高效开发提供较好的借鉴作用。取得的主要研究成果为：1.对研究区长4+5各小层微构造进行了详细深入的研究,精细刻画出了微幅度构造的分布范围,分析了微构造对油气富集和剩余油分布的控制作用。2.对本区储层沉积微相类型、展布特征、主控因素以及不同沉积体的岩电特征进行了系统研究和精细描述,长4+5上主要发育三角洲平原沉积,认为长4+5下主要发育三角洲前缘沉积,后者砂体展布受湖浪控制比较明显,砂岩具有连片性较好、规模较大的特征。3.通过对四性关系和油水干层识别的系统研究,确定了各小层储量计算参数,落实了本区原始地质储量,并在标定的水驱采收率条件下估算了油藏剩余可采储量以及动用程度。4.通过初期三维地质建模时阶段采用“协同模拟建模方法”保证地质模型的准确性,并在历史拟合阶段利用单井拟合率定量评价地质模型的可靠性,建立了一套油藏地质模型评价方法,使得数值模拟结果更加精确。5.通过油井产能变化、注水动态、注水见效特征、水淹规律等方面的系统分析,明确了本区低产、稳产困难的原因以及剩余油分布的主控因素。6.通过精细数值模拟研究,定量刻画了了长4+5油藏各小层的剩余油分布和压力场分布特征；并综合地质认识、动态分析等研究结果制定了一套切合实际的油藏综合调整方案。研究成果已用于油田剩余油挖潜,措施增油效果明显,产生了较好的经济效益。更多还原

【Abstract】 Chang4+5reservoir of Danba oil field in Ordos Basin was taken as the study object in this thesis.The fine reservoir description, reservoir dynamic analysis, reservoir engineering, numerical simulation and petroleum engineering were integrated applied.Performance and static state were united to deeply research sedimentary facies, microtectonics, reservoir characteristic, geological reserves, residual oil law and corresponding digging measures, and to develop a set of research ideas and technologies on the remaining oil distribution and potential-tapping measures in the lithology in Ordos Basin, which will offer reference to the similar reservoir development.The main researches are as follows:1. Microtectonics of each subzone of chang4+5were researched systematically and deeply, mierostrueture distribution was described finely, meanwhile mechanism of gas-oil inrichment and oil remaining distribution was studied.2. The reservoir depositional microfacies, the sandbody distribution, the main controlling factors and rock-electrical characteristic of different sedimentary body were firstly researched systematically and finely under small well space of300metres, of which indicate that lower chang4+5was delta front intrafacies and upper chang4+5was deltaic plain intrafacies, and the sandbody distribution of former was controlled by lake waves and its scale was more than the latter.3. The four property relations and recognition of oil layer, water layer, dry layer was studied systematically, to deternine the reserves calculating parameters of each layers and complete the original geological reserves.The remaining recoverable reserves and use of degree was estimated under the condition of EOR standardizing of water flooding.4. In order to obtain a more accurate result of numerical simulation, the evaluating method of geological model was established using co-simulation modeling method in the stage of3D reservoir model constructing and using well match rate to evaluate quantitatively the reliablility of geological model in the stage of history match.5. The production changes of oil well, dynamic of water flooding, effective characteristics of water flooding, flooding law were studied systematically, and the reasons that it was difficult to maintain production and productiion was low were indictated deeply. As the same time, dominant factors of oil remained distribution was discussed.6. A historical match and prediction on liquid production, oil production and production degree were made to define the characteristics of remaining oil distribution and pressure filed of lays of chang4+5reservoirs through numerical simulation. Base on these studies of geological description, dynamic analysis and numerical simulation, the adjustment and development strategy of the remained oil is made out. After the implementation of program, significant production increasing and good economic benefits are brought into play for the filed.更多还原