【作者】 陈德坡；

【导师】 李宝芳；

【作者基本信息】 中国地质大学（北京） ， 矿产普查与勘探， 2009， 博士

【摘要】 中文摘要孤东油田馆上段正粒序厚油层的开发已进入高含水期,但采出程度较低。为提高厚油层采收率,本文以孤东油田七区西馆上段水道砂岩厚油层为研究对象,对厚油层进行分段对比,并对其中夹层的井点识别和井间预测进行了研究。在此基础上开展厚油层开采特征与剩余油分布特征研究,寻找剩余油富集区,确定潜力目标。最后通过开展正粒序厚油层水平井开发技术政策界限研究,形成了正粒序厚油层水平井开发配套技术。论文的主要成果及认识如下:(1)应用沉积学理论,对水道砂岩储层进行了细分对比研究,并通过取心井建立岩电关系,用高分辨率测井识别井点夹层,用韵律层对比、物性截断、条件模拟等方法预测井间夹层,描述层内夹层的空间展布。(2)综合运用地质分析、开发动态分析、油藏工程、数值模拟等方法,对剩余油分布进行了研究,实现了对剩余油富集区的定量描述。(3)系统地研究了夹层分布特征、油层水淹程度、水平井段长度、生产压差以及提液时机等参数对水平井开发效果的影响,确定了正粒序厚油层水平井开发技术政策界限。(4)在高含水开发后期、密井网条件下,根据上述剩余油定量描述成果,运用水平井技术挖潜厚油层剩余油,新设计水平井12口,增加了可采储量35×104t,提高了采收率2.1%。更多还原

【Abstract】 The thick oil-bearing channel sandstone reservoir of the Upper Guantao Formation has already developed into its high water cut stage, but the recovery factor remains in a low level. Therefore, the Upper Guantao Formation of the western Block 7 of Gudong Oilfield was selected as the research target in this paper. To enhance the thick oil-bearing channel recovery, in the research work, sedimentary features and architecture elements, as well as the electric properties of intercalated bed became the recognition criteria. On the basis of detailed geologic research on the thick oil-bearing finning upward sequence segment, the thick channel oil sand body research of filtration mechanism, development characters and regular and the remaining oil pattern was done to find the rich domain and to locate the potential targets. Finally, by developing policy limitation research of horizontal well development technique for finning upward sequence channel reservoir, horizontal well development techniques were formed. In this thesis, the main results are as follows:(1) By using sedimentology theory, the correlation and subdivision research were done to the channel sand reservoir, and relationship between core and electric responses was founded from the cored well. High-resolution well log and fine interpretation technique are used to identify single well intercalated bed. Interwell intercalated bed was forecasted by rhythmic layer correlation, physical property cutoff and conditional simulation, and three-dimensional distribution of intraformational intercalated bed was described.(2) The technique set of combination geologic analysis, reservoir performance analysis, reservoir engineering, numerical simulation were formed to described remaining oil enriched area in qualitative and quantitative way.(3)Distribution characteristics of intercalated bed, degree of water sweep, length of horizontal section , producing pressure drop and liquid increase timing were studied systematically to the development effect of horizontal well. Technical support limitation of horizontal well of channel sand reservoir was confirmed.(4)On the condition of late high water cut stage and small-spaced well pattern, we extracted remaining oil successfully by horizontal wells aiming at the distribution character of remaining oil of thick oil layer. 12 horizontal wells were drilled with increment of recoverable reserves of 35×10~4t, i.e. 2.1% of the OOIP.更多还原