孤岛油田渤21断块Ng3-4构造精细解释

发布时间：2018-05-27 00:41

本文选题：孤岛油田 + Ng3-Ng4　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：孤岛油田渤21断块经过了近半个世纪的开发,勘探初期的构造解释已经无法满足现在的生产需要,区块边部构造特征、储层及油水关系复杂,南部新井5X20发现新储层,北部原砂体尖灭区附近新井钻遇效果较好,单元周边构造特征及储层分布尚需深化研究;其次截止目前Ng3、Ng4砂层组已采用注水、注聚和热采等三种开发方式,单元主体区目前正在注聚,注聚区目前综合含水87.6%,单井控制剩余储量3.2×104t,具备剩余油挖潜潜力。为保证油田稳产扩边需求和剩余油挖潜需要,以国内外对滚动勘探开发与剩余油开发的大量实践经验为指导,通过地层精细划分与对比,建立细分层格架,并据此开展构造精细解释及边部储层预测,研究渤21断块边部油水分布规律,重点揭示渤21断块馆3、馆4砂层组断裂分布特征及油层分布,分析主体区微构造与剩余油的关系,为老油田滚动勘探开发和主体区挖潜有利区带预测提供地质依据。研究表明:工区主要发育曲流河沉积为主,研究区存在较为典型且发育十分广泛的标准层,从而保证了地层对比结果的准确性。工区馆陶组主力砂层,厚度大且分布广,有成为油砂体的优势。井震结合完成目的层段构造精细解释,渤21断块为自东向西倾没的单斜构造,构造较为简单,东陡西缓;针对该工区的主力小层Ng3-3、Ng3-4和Ng3-5进行以边部无井区为重点的储层预测,波阻抗反演预测结果准确性好于地震属性预测结果。结合油层精细构造研究及储层预测结果,落实主力油层边部油水边界及发现工区以发育正向微构造为主,且正向微构造附近,剩余地质储量和剩余油饱和度均好于负向微构造。根据边部储层与油水关系及主体区剩余油与微构造关系进行有利区带预测。
[Abstract]:After nearly half a century of development of Bo21 fault block in Gudao Oilfield, the early structural interpretation of exploration can no longer meet the current production needs. The structural characteristics of the edge of the block, the complex relationship between reservoir and oil and water, and the discovery of new reservoirs by 5X20 in the south of the new well. The drilling effect of the new well near the original sand body in the northern area is good, and the structural characteristics and reservoir distribution around the unit need to be further studied. Secondly, up to now, three kinds of development methods such as water injection, polymer injection and thermal recovery have been adopted in the Ng3 + Ng4 sand formation. At present, the unit main area is injecting polymer, and the polymer injection area has a comprehensive water cut of 87.6%. The remaining reserves controlled by a single well are 3.2 脳 10 ~ (4) t, so it has the potential of tapping the remaining oil potential. In order to meet the needs of expanding the edge of stable production and tapping the potential of remaining oil in oil fields, the fine division and correlation of strata are used to establish a subdivision layer framework, guided by a great deal of practical experience in rolling exploration and development of remaining oil at home and abroad. Based on the fine interpretation of structure and reservoir prediction of the edge, the distribution of oil and water in the edge of Bo-21 fault block is studied. The distribution characteristics of fault and reservoir in Guan3 and Guan4 of Bo-21 fault block are revealed, and the relationship between the microstructures in the main area and remaining oil is analyzed. It provides geological basis for rolling exploration and development of old oilfield and prediction of favorable zone for tapping potential in main area. The study shows that the meandering river deposits are mainly developed in the working area, and there are typical and widely developed standard layers in the study area, thus ensuring the accuracy of the stratigraphic correlation results. Guantao formation has the advantages of large thickness and wide distribution. Well and earthquake combined with completion of fine interpretation of the structure of the target formation, Bo-21 fault block is a monoclinic structure dipping from east to west, with simple structure and gentle structure in east, steep and west. For the main sublayer of this work area, Ng3-3 / Ng3-4 and Ng3-5, the reservoir prediction is focused on the no-well area in the edge part. The prediction result of wave impedance inversion is better than that of seismic attribute prediction. Combined with the study of fine structure of reservoir and reservoir prediction results, the oil-water boundary of the main oil layer edge and the discovery area are mainly developed forward microstructures, and the remaining geological reserves and remaining oil saturation are better than negative microstructures in the vicinity of forward microstructures. The favorable zone prediction is made according to the relationship between reservoir and oil and water and the relationship between remaining oil and microstructure in the main area.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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