北东一区萨尔图油层地震解释及储层预测

发布时间：2018-01-16 06:09

本文关键词：北东一区萨尔图油层地震解释及储层预测　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：本论文从研究区当前实际生产的地质需求出发,即构造认识精度低和井间砂体刻画难两个问题,将密井网信息与三维地震结合起来,开展了井震联合构造解释和储层预测相关技术研究,深化了研究区地质认识,成果可以应用在指导扩边水平井部署中。在构造刻画上,运用了密井网条件地震地质层位标定技术,实现多井标定的一致和统一。依据波阻特征将SI、SII划分为标准层,SIII、PI为非标准层;利用密井网条件井分层控制完成萨尔图油层各油层组顶面的层位解释。同时,应用构造趋势面分析法、三维切片技术进行微幅度构造的识别。最终,编制了SI、SII、SIII、PI共4个层位顶面的高精度构造图。在构造解释的基础上,形成了多井约束地震反演技术,有效识别了1m以上砂岩(条件是泥岩隔层大于3m)。开展井震联合绘制沉积相带工作,对研究区发育的10种砂体类型空间展布形态进行精细描述。在开发应用上,利用精细构造和储层预测结果,进行开发潜力区预测及井位优选。通过精细构造解释,有效识别出构造幅度5m以上,闭合面积0.25km2以上微幅度构造8个;重新落实了三个油层组过渡带油水边界线,相比于原油水边界线均向外移动20m。通过储层预测可知,砂体在全区较为发育,纵向上砂岩平均厚度逐渐增加,横向上砂体的展布面积也逐渐增大,反映从上到下砂体的发育规模越来越大。通过沉积相刻画可知,规模大的坨状砂体变化不大,仅个别部位出现砂体尖灭;曲流带砂体内部出现斑状的薄层砂,单一发育的曲流河河道砂体连续性变差;原砂岩不发育井区,井间新增一些规模较小的水下分流河道和单砂体。综合构造解释和储层预测结果,根据砂岩厚度大小,划分了一类、二类和三类潜力区,确定一口水平井井位。
[Abstract]:In this paper, according to the geological demand of actual production in the research area, that is, the problem of low structural recognition accuracy and difficult delineation of cross-well sand body, the information of dense well pattern is combined with three-dimensional seismic. The related techniques of well seismic combined structural interpretation and reservoir prediction have been studied, and the geological understanding of the study area has been deepened. The results can be applied to guiding the deployment of horizontal wells along the extended edge and structural characterization. The technique of seismic geological horizon calibration under dense well pattern condition is used to realize the consistency and unity of multi-well calibration. According to the wave resistance characteristic, SINSII is divided into standard layer SIIII-PI as non-standard layer. The stratification control is used to complete the interpretation of the top surface of each reservoir in Saltu reservoir. At the same time, the identification of micro-amplitude structure is carried out by using the method of structural trend surface analysis and three-dimensional slice technology. A high precision structural map of four horizon top surfaces is compiled. Based on the structural interpretation, a multi-well constrained seismic inversion technique is developed. The sandstone above 1m is effectively identified (the condition is that the mudstone interval is more than 3 m), and the work of combining well and earthquake to draw sedimentary facies zone is carried out. The spatial distribution patterns of 10 types of sand bodies developed in the study area are described in detail. In development and application, fine structures and reservoir prediction results are used. Through fine structure interpretation, 8 structures with structure amplitude above 5m and closing area above 0.25 km ~ 2 can be effectively identified. The oil-water boundary line of the transition zone of the three reservoirs has been re-implemented, and compared with the oil-water boundary line, the oil-water boundary line has been moved outward by 20m.The reservoir prediction shows that the sand body is relatively developed in the whole area, and the average thickness of sandstone increases gradually in the longitudinal direction. The distribution area of the transverse sand bodies also increases gradually, reflecting the growing scale of sand bodies from the top to the bottom. Through the sedimentary facies characterization, it can be seen that there is little change in the large scale lump sandbodies, and only a few parts have the sand bodies out; There are porphyry thin-layer sand in the sand body of the meandering zone, and the continuity of the single meandering river channel sand body becomes worse. Some small subaqueous distributary channels and single sand bodies have been added between wells in the undeveloped well area of the original sandstone. According to the results of structural interpretation and reservoir prediction, the potential areas of one, two and three types have been divided according to the thickness of sandstone. Determine the location of a horizontal well.
【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;P631.4

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