高18块莲花油层精细地质描述及开发调整研究

发布时间：2018-03-22 02:35

本文选题：高18块　切入点：莲花油层　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：高18块位于辽河盆地西部凹陷中部高升油田高二三区南端,开发目的层为古近系沙河街组莲花油层,是具有开发潜力的重点区块。由于开发程度低,对构造特征、储层特征等缺乏深入认识,以致本区开发工作进展迟缓。为了解决关键问题—构造、储层问题,作者运用陆相沉积盆地沉积学、层序地层学及三维地震精细解释的新方法、新技术有效开展了高18块莲花油层精细地质描述的研究工作,结果表明:高18块整体是正断层所复杂化的背斜构造,主要以北东向断层为主干断裂,其控制该区构造形态,此外还发育了一系列北西、近东西向断裂,对构造起分割作用;本区主要为水下扇沉积,物源主要来自东北方向,储层岩性主要为砂砾岩,粘土矿物含量高,以蒙皂石为主,总体呈现弱碱敏、中等偏强水敏、强酸敏的特点;莲花油层储层物性纵向上5砂体好于1-4砂体,平面上区块中部物性最好,东部相对较差。同时,运用多方法开展剩余油分布规律研究表明,剩余油纵向主要分布在水下分流河道砂体正韵律层上部;平面上主要分布在注采不完善区、动用程度差层位、断层控制区、井控程度低区。最后,本文结合岩心分析、动态监测及剩余油研究搞清了制约油藏平面及纵向开发效果的关键因素,确定了“主体部位注水调驱、东部压裂改造辅以高压注汽的方式提高储量动用程度”的开发调整策略,部署部分开发井,目前通过新井逐步实施,油藏取得较好开发效果。
[Abstract]:Gao18 block is located at the southern end of Gaosheng3 area of Gaosheng Oilfield in the western sag of Liaohe Basin. The development target layer is Lianhua oil reservoir of Shahejie formation of Paleogene system, which is a key block with development potential. In order to solve the key problems such as structure and reservoir problems, the authors use a new method of continental sedimentary basin sedimentology, sequence stratigraphy and 3D seismic fine interpretation. The new technique has effectively carried out the research work of fine geological description of Lianhua reservoir in Gao18 block. The results show that Gao18 block is an anticline structure complicated by normal fault, and the main fault is the main fault in the north to east direction, which controls the structural form in this area. In addition, a series of NW, near EW-trending faults have been developed, which play a role in the division of the structure. This area is mainly composed of subaqueous fan deposits, the source mainly comes from the northeast direction, the reservoir lithology is mainly sandy gravel, the clay mineral content is high, and the smectite is the main source. The reservoir physical properties of Lianhua reservoir are better than 1-4 sand body in longitudinal direction, the middle part of the block is the best, and the eastern part is relatively poor, the characteristics of the reservoir are weak alkali-sensitive, moderate strong water sensitivity and strong acid sensitivity, and the reservoir physical properties of Lianhua oil reservoir are better than 1-4 sand body in the longitudinal direction. The study on the distribution of residual oil by multiple methods shows that the remaining oil is mainly distributed in the upper part of positive rhythm layer of sand body in underwater distributary channel, in the area of imperfect injection-production, in the position of poor production degree, in the fault control area, and in the vertical distribution of remaining oil in the subaqueous distributary channel. Finally, combined with core analysis, dynamic monitoring and remaining oil research, the key factors restricting the horizontal and longitudinal development effect of the reservoir are found out, and the "water flooding and flooding at the main part of the reservoir" is determined. In the eastern part of China, the development adjustment strategy of fracturing and revamping with high pressure steam injection to improve the production degree of reserves is used to deploy part of the developed wells. At present, through the implementation of the new wells step by step, the reservoir has achieved better development results.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;TE327

【相似文献】