辽河油田锦99区块杜家台油层基础地质研究

发布时间：2018-05-16 09:38

本文选题：稠油油藏 + 构造特征　；参考：《浙江大学》2015年硕士论文

【摘要】：本文所要研究的锦99块杜家台油层构造位置位于辽河断陷盆地西部凹陷西斜坡的西南部,北靠千12块,南邻锦7块。为典型的层状普通稠油,岩性以中细砂岩为主,砂砾岩与泥岩交互层,是一个被断层遮挡的边底水油藏。自1983年投入开发以来,由于该油田平面上砂岩连通系数较低,纵向上非均质性突出,单层突进现象严重,油层动用极为不均。造成了注水见效的高渗透层含水高,产能低；而注水效果差的低渗透层地层压力低,产液能力低的生产状况。导致该块采收率低,产量递减快。开发过程中已经暴露出明显的层间矛盾,需要对油藏加深认识,建立精细的三维地质模型,开展剩余油分布规律研究,提出挖潜措施。本次研究以油藏地质研究为基础,从地质、测井、地震多方面入手,开展地层、构造、储层宏观分布和不同沉积体系研究。在地质方面,以沉积学理论为指导,采用“旋回为基础,标志层控制,三级对比,逐级细分”的旋对比方法,进行全区整体解剖,宏观控制,以大层的区域统层、构造精细解释和储层分布为主线,建立油田级油藏主体框架；并根据岩相、古生物以及电性标志,确定了沉积微相类型和发育特征,进行剖面沉积微相研究,分析了沉积微相和砂体分布规律,结合储层测井二次解释结果,建立了储层、构造、沉积相模型。以地质模型为基础开展了全油田规模的数值模拟研究,完成了储量拟合、历史拟合、搞清了各小层剩余油分布规律研究,区块剩余油分布主要集中在断层附近、砂岩尖灭带及井网不完善区域,以及储层物性相对较差以及剩余未射孔区域。
[Abstract]:The structural location of Dujiatai reservoir in Block Jin99 in this paper is located in the southwest of the west slope of the western depression of the Liaohe fault depression, and lies in the north of Qian12 blocks and the 7 blocks of the Nanjingjin basin. It is a typical stratified common heavy oil with medium and fine sandstone as the main lithology and interbedded between gravel and mudstone. It is an edge and bottom water reservoir blocked by fault. Since it was put into development in 1983, because of the low connectivity coefficient of sandstone in the oil field, the prominent vertical heterogeneity, the serious phenomenon of single layer protruding, and the extremely uneven production of the reservoir. The formation pressure and liquid production capacity of the low permeability layer with poor water injection efficiency are low and the water cut is high and the productivity is low in the high permeability layer with high water injection efficiency. As a result, the block oil recovery is low and the output is decreasing rapidly. The obvious interlayer contradiction has been exposed in the course of development, so it is necessary to deepen the understanding of the reservoir, establish a fine three-dimensional geological model, study the distribution law of remaining oil, and put forward the measures of tapping potential. Based on the study of reservoir geology, the study of stratigraphy, structure, macroscopic distribution of reservoir and different sedimentary systems is carried out from the aspects of geology, logging and earthquake. In geology, guided by sedimentology theory, the whole area is dissected and macroscopically controlled by the rotation contrast method of "cycle as basis, marker layer control, three-level contrast, subdivision". Fine structural interpretation and reservoir distribution are the main lines to establish the main framework of oilfield grade reservoirs, and according to lithofacies, paleontology and electrical indicators, the types and development characteristics of sedimentary microfacies are determined, and the sedimentary microfacies of profile are studied. The distribution law of sedimentary microfacies and sand bodies is analyzed. Combined with the results of reservoir logging secondary interpretation, the reservoir, structure and sedimentary facies models are established. Based on the geological model, the numerical simulation of the whole oilfield scale has been carried out, the reserve fitting and historical fitting have been completed, and the distribution law of remaining oil in each sub-layer has been clarified. The remaining oil distribution in the block is mainly concentrated near the fault. The sandstone pinching zone and well pattern are not perfect, and the reservoir physical property is relatively poor and the remaining unperforated area.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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