史南油田梁11断块沙二段精细地质建模

发布时间：2018-06-13 01:01

本文选题：梁11断块 + 单砂体　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：史南油田梁11断块为一构造-岩性油气藏。本次研究目的层段为沙二段7、8层系,属于三角洲前缘亚相沉积,为工区主要产油层。目前,油藏整体已经进入特高含水期,通过分析油藏动静态数据发现,研究区存在层间差异大、采出程度不均衡、单井产能低、采油速度低、水淹情况严重、停产停注井多、停井时间长、注采对应率低以及注采系统极不完善等问题,严重影响了开发生产。本论文在地层及储层的精细划分与对比、三角洲前缘亚相沉积特征系统研究的基础上,重点分析等时格架控制下的三角洲前缘沉积体系中单砂体的空间展布特征,建立基于单砂体的精细储层地质模型,为油藏数值模拟提供可靠的静态模型,为工区剩余油的进一步挖潜提供切实可靠的依据。以钻井岩心资料为基础,在单砂体内部识别出泥质夹层、物性夹层、钙质夹层3种成因分界面,并建立其对应的测井响应模板;总结出研究区发育7种单砂体叠置模式,并对单砂体以及隔夹层的剖面和平面特征进行精细分析;根据隔夹层的展布范围及钻遇率,将其划分为稳定型、次稳定型和随机发育型三种类型。在以上精细地质研究的基础上,建立基于单砂体的储层地质模型,表征储层成因单砂体的展布特征。利用精细构造解释以及井震结合绘制的构造图做约束建立精确的构造格架模型,在此基础上,根据三重套嵌、隔夹层分类建模‖方法,建立砂体模型和隔夹层模型;由于研究区井网密度大并且已经具有精细的地质认识,利用确定建模的方法建立单砂体模型;根据单砂体控制的原则,对孔隙度参数进行序贯高斯模拟,并以孔隙度模型作为第二变量约束,对渗透率参数进行序贯高斯同位协同模拟。最后对模型进行了地质模型与概念模型对比检验、概率分布一致性检验和油藏数值模拟检验,结果均表明所建立的地质模型具有较高的精度。
[Abstract]:Liang11 fault block in Shinan Oilfield is a structural-lithologic reservoir. The target formation of this study is the 7J / 8 series of the second member of Sha, which belongs to the delta front subfacies and is the main oil producing layer in the working area. At present, the whole reservoir has entered an extra high water cut period. By analyzing the dynamic and static data of the reservoir, it is found that there are great differences between layers, uneven production degree, low productivity of single well, low oil recovery rate, serious water flooding, and many wells stopping production and injection in the study area. The problems of long stopping time, low corresponding rate of injection and production and imperfection of injection-production system have seriously affected the development and production. Based on the fine division and correlation of strata and reservoirs and the study of delta front subfacies sedimentary system, the spatial distribution characteristics of single sand body in delta front sedimentary system controlled by isochronous frame are analyzed in this paper. A fine reservoir geological model based on single sand body is established to provide a reliable static model for reservoir numerical simulation and a practical and reliable basis for further tapping the potential of remaining oil in the working area. Based on drilling core data, three genetic interfaces of muddy intercalation, physical intercalation and calcareous intercalation are identified in the body of single sand, and their corresponding log response templates are established. The profile and plane characteristics of single sand body and intercalation are analyzed in detail. According to the distribution range and drilling rate of the barrier intercalation, it can be divided into three types: stable type, substable type and random developing type. On the basis of the fine geological research above, the reservoir geological model based on single sand body is established to characterize the distribution characteristics of single sand body of reservoir genesis. The precise structural framework model is established by using fine structural interpretation and well shock combined with the structural map drawn as constraints. On this basis, sand body model and intercalation model are established according to the classification modeling method of triple-sleeve and intercalation. Because of the high density of well pattern and the fine geological knowledge in the study area, the single sand body model is established by using the method of deterministic modeling, and the porosity parameters are simulated by sequential Gao Si according to the principle of single sand body control. With porosity model as the second variable constraint, sequential Gao Si co-simulation of permeability parameters is carried out. Finally, the geological model is compared with the conceptual model, the probability distribution consistency test and the reservoir numerical simulation test are carried out. The results show that the geological model has a high accuracy.
【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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