葡北地区侏罗系构造特征分析及储层预测

发布时间：2018-10-18 20:50

【摘要】：葡北地区中浅层构造圈闭勘探程度较高,主要构造圈闭多已经钻探,属于油田勘探的中后期。精细构造勘探和岩性、地层圈闭勘探工作将是葡北地区未来勘探的重点目标,同时,探明东斜坡对葡北主油藏的控制作用也极为重要。本文以葡北地区三维地震资料为主,对葡北地区侏罗系目的层建立了层序格架,进行了构造精细解释和储层预测,进一步落实葡北地区七克台组底界和三间房组的断裂组合特征、构造演化特征和圈闭形态。葡北地区构造特征主要是南西抬升,北东下降的单斜,来自南北向的挤压构造作用非常明显,东部发育斜坡区,是在向北倾伏的基岩鼻状低隆起上继承性发育起来的低幅度构造群,主要发育近东西向鼻状构造,在PB101井附近可见明显的背斜形态。断裂系统主次分明,对成藏控制作用明显。新发现圈闭8个,总面积72.187km2。分析了葡北地区目的层井下测井响应特征,发现常规声波阻抗在区分泥岩与砂岩储层上效果不好,而自然电位曲线在区分岩性上效果好很多,综合储层预测的需要,利用拟声波曲线重构的方法对目的层进行了反演研究,同时结合了地震属性、叠前AVO属性和油气检测技术对目标圈闭进行了评价。在沉积相研究的基础上,预测了砂体平面和纵向的展布情况,确定了断裂控藏作用及有利圈闭的勘探潜力。根据构造特征、圈闭发育与落实程度、储层预测、属性分析以及油气检测结果明确了有利勘探区域,提供了建议勘探井位方案,为葡北地区进一步评价与开发方案的部署奠定了基础。
[Abstract]:The exploration degree of middle and shallow structural traps in Pubei area is relatively high, and the main structural traps have been drilled mostly, which belongs to the middle and late stage of oil field exploration. Fine structure exploration, lithology and stratigraphic trap exploration will be the key targets for future exploration in the north of Portugal. At the same time, it is very important to find out the control effect of east slope on the main reservoir in north Portugal. In this paper, based on the 3D seismic data in the north of Portugal, the sequence framework of the Jurassic target layer in the north of Portugal is established, and the fine interpretation of the structure and reservoir prediction are carried out. The characteristics of fault assemblage, tectonic evolution and trap morphology of the bottom boundary of Qiketai formation and Sanjianfang formation in Pubei area are further carried out. The structural characteristics of the north Portuguese area are mainly the southwestern uplift, the north east descending monoclinal, the compressional structure from the south to north direction is very obvious, the eastern developed slope area, It is a low-amplitude structural group inherited from the nose-shaped low uplift of bedrock which is trending northward. It mainly develops near east-west nose structure and has obvious anticline shape near PB101 well. The fault system has distinct main and secondary functions and has obvious effect on controlling reservoir formation. Eight new traps with a total area of 72.187km2. The response characteristics of downhole logging in the target zone in Pubei area are analyzed. It is found that the conventional acoustic impedance is not effective in distinguishing mudstone from sandstone reservoir, while the natural potential curve is much better in distinguishing lithology, so it is necessary to synthesize reservoir prediction. The inversion of the target layer is carried out by using the pseudo acoustic curve reconstruction method, and the target trap is evaluated by combining seismic attributes, prestack AVO attributes and oil and gas detection techniques. Based on the study of sedimentary facies, the distribution of sand bodies in plane and longitudinally is predicted, and the exploration potential of fault-controlled reservoir and favorable traps is determined. According to the structural characteristics, the degree of trap development and implementation, reservoir prediction, attribute analysis and oil and gas detection results, the favorable exploration area is identified, and the proposed exploration well location scheme is provided. It lays a foundation for the further evaluation and deployment of the development program in the north of Portugal.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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