欢127块兴隆台油层开发地质特征及井网优化设计

发布时间：2018-03-20 10:03

本文选题：兴隆台油层　切入点：地质特征　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：在石油工业日趋发展的时代,稠油资源在目前的地质储量中占有的比例越来越大,因此如何提高稠油油藏的采收率,实施高效开发成为当今世界石油人不断研究的重中之重。本文研究的欢127块地理位置上位于锦州市锦县东三义村,从区域构造上位于辽河断陷西部凹陷西斜坡南段上倾部位。2012年底,为了进一步提高欢127块兴隆台油层的采收率,保证开发效果,在欢127西块兴隆台油层实施了重力泄水辅助蒸汽驱试验,试验过程中,由于区块受到沉积相、地质构造、原油物性等各种因素影响,试验井组出现采注比较低,排水及降低压力的效果较差等现象,蒸汽驱的试验效果不明显,由此我们对区块的开发地质特征进行了重新认识,并在认识的基础上开展了蒸汽驱排水降压井网的优化设计。本文主要利用目前现有的录测井资料,同时配合地震精细解释技术在前人研究的基础上重新对区块的构造进行落实,开展地质统层对比,进而落实油层厚度、油层发育情况、渗透率、孔隙度、地层倾角变化、隔夹层分布及沉积相带等因素对研究区试验井组蒸汽驱的影响。同时采用剩余油研究方法对区块的剩余油及其分布进行总结归纳,实施开发效果评价工作,分析试验井组目前蒸汽驱的生产阶段,蒸汽腔扩展状态及影响因素。并结合区块构造形态、砂体分布的实际情况,用油藏工程法和渗流力学法计算油藏单井产液能力,计算注采水平井的井距和油层纵向深度,研究水平井-水平井、水平井-直井、直井-直井井网等不同井网对蒸汽腔形成的影响,对比选取注采井的立体分布最优化设计,优选适合欢127块的汽驱井网及相关注采参数。最终优选的“回”字形井网增加了注采井的比例,能够进一步提高采注比,进而实现排水降压,在现场试验中取得了较好的应用效果,对于同类型油藏具有积极的指导作用。
[Abstract]:In the era of petroleum industry developing day by day, the heavy oil resource occupies more and more proportion in the present geological reserves, so how to improve the recovery factor of heavy oil reservoir, The implementation of efficient development has become the top priority of the world's petroleum people. The Huan 127 blocks studied in this paper are located in East Sanyi Village, Jinxian County, Jinzhou City. In order to further improve the recovery factor of Xinglongtai reservoir in block Huan127 and ensure the development effect, the regional structure is located in the southern section of the western slope of the western depression of Liaohe fault depression. The gravity drainage auxiliary steam drive test was carried out in the Xinglongtai reservoir of Huan127 West Block. During the test process, due to the influence of various factors such as sedimentary facies, geological structure, crude oil physical property, and so on, the production and injection rate of the test well group was relatively low. The effect of drainage and pressure reduction is poor, and the experimental effect of steam flooding is not obvious. Therefore, we have a new understanding of the development geological characteristics of the block. On the basis of understanding, the optimum design of steam drive drainage depression-relief well pattern is carried out. In this paper, the existing logging data are mainly used, and the block structure is re-implemented on the basis of previous studies with the help of seismic fine interpretation technology. To carry out geological reservoir correlation, and then to implement changes in reservoir thickness, reservoir development, permeability, porosity, formation dip angle, The influence of intercalation distribution and sedimentary facies belt on steam drive of test well group in the study area is studied. At the same time, the remaining oil and its distribution in the block are summarized by using residual oil research method, and the development effect evaluation is carried out. This paper analyzes the production stage of steam flooding in test well group, the expansion state of steam cavity and the influencing factors. Combined with the actual situation of block structure and sand body distribution, the reservoir engineering method and percolation mechanics method are used to calculate the fluid production capacity of single well in the reservoir. The influences of different well patterns, such as horizontal well horizontal well, horizontal well vertical well, vertical well pattern and vertical well pattern, on the formation of steam cavity are calculated, and the optimum design of three-dimensional distribution of injection-production wells is compared and selected. The optimum selection of steam drive pattern and related injection-production parameters for block Huan 127 increases the proportion of injection-production wells and further improves the ratio of production to injection, and then realizes drainage and pressure reduction. It has good application effect in the field test, and has positive guiding function for the same type reservoir.
【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】：TE324;P618.13

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