秦皇岛32-6油田明下段Ⅲ油组储层特征与地质建模

发布时间：2018-10-17 19:42

【摘要】：秦皇岛32-6油田的整体构造幅度相对平缓、油水关系非常的繁杂,底水油藏储量占了40%,并且该油田是初次在海上开辟的大型河流相砂岩稠油油田,开发前期与开发建设阶段尚缺少在海上开发这类油田的经验。在初期开采阶段,秦皇岛32-6油田含水量突增,年产量也在逐渐下降。针对油田存在的问题,应该从油田开发研究最基础也是最重要的环节—地质综合研究入手,深入研究储层地质特征,并将其反映在模型中,为之后的数值模拟做充分准备。本人重点以该油田明化镇下段III油组为例,进行了相关的研究。论文首先对秦皇岛32-6油田地区背景和研究性质做了总结,以油藏描述为根本立足点,指出研究的目标与任务——即必需展开地质研究和精细三维地质模型的建立,为增加产量和采收率做好铺垫。同时根据收集的资料和现有的研究,按照旋回对比为主,分级控制为辅的理论划分III油组。经过基础剖面和辅助剖面的建立,逐步形成对比闭合圈,将III油组分成18个小层,而泥岩隔层有9层。之后通过多口井的岩心观察,以及了解岩性电性之间的对应关系,综合利用岩心,地震,测井来研究III油组沉积相。沉积微相的研究从单井相观察入手,由点向面逐步展开:通过储层的测井相,地震相及砂体分布特征的分析,做出砂层厚度平面分布图、沉积微相平面分布图。由图阐述III油组沉积微相模式,砂体物性和储层非均质特征。最后,由以上的地质研究和前人资料完成了建模初期输入资料的准备与收集,并建立了模型基本框架,对秦皇岛32-6油田III油组进行相模拟。针对该III油组的特征,在Petrel软件中采用了不一样的的沉积微相模拟方法,研究了基于像元的序贯指示法及基于目标的目标模拟法的适用性,通过多次试验,改变不同的参数设置,最终总结出适宜的建模体系和方法——目标模拟法。模型完成后的结果与地质认识相符合,为定量描述该油田剩余油分布及油水运动规律的油藏数值模拟提供了准确的地质认识及依据。
[Abstract]:Qinhuangdao 32-6 oil field has a relatively flat structural range and complex oil-water relationship. The reserve of bottom water reservoir accounts for 40%, and the oilfield is the first large-scale fluvial sandstone heavy oil field to be opened up on the sea for the first time. The early stage of development and the stage of development and construction are still lack of experience in offshore development of such oil fields. In the early stage of exploitation, the water content of Qinhuangdao 32-6 oilfield increased and the annual production decreased gradually. In view of the problems existing in oil fields, we should start with the most basic and important link of oilfield development research-geological comprehensive research, deeply study the geological characteristics of reservoirs, and reflect them in the model, so as to fully prepare for the subsequent numerical simulation. Taking the III formation of Lower member of Minghua Oilfield as an example, the relevant research has been carried out in this paper. Firstly, the paper summarizes the regional background and research properties of Qinhuangdao 32-6 oilfield, taking reservoir description as the basic foothold, and points out that the goal and task of the research is to develop geological research and the establishment of fine three-dimensional geological model. To increase production and oil recovery to do a good job. At the same time, according to the collected data and existing research, the III oil group is divided according to the theory of cycle correlation and classification control. Through the establishment of basic section and auxiliary section, the III oil formation is divided into 18 sublayers and 9 layers of mudstone interlayer. The sedimentary facies of III oil formation are studied by core observation of multiple wells and understanding of the corresponding relationship between lithologic and electrical properties, and comprehensive use of cores, earthquakes and logging. The study of sedimentary microfacies starts with the observation of single well facies and develops gradually from point to face: through the analysis of reservoir logging facies, seismic facies and sand body distribution characteristics, the sand layer thickness plane distribution map and sedimentary microfacies plane distribution map are obtained. The sedimentary microfacies model, sand body property and reservoir heterogeneity of III oil formation are described. Finally, based on the above geological research and previous data, the preparation and collection of input data at the initial stage of modeling are completed, and the basic framework of the model is established to simulate the III oil formation in Qinhuangdao 32-6 Oilfield. According to the characteristics of the III oil group, different sedimentary microfacies simulation methods are used in the Petrel software, and the applicability of the pixel based sequential indicator method and the target based target simulation method are studied. Finally, the suitable modeling system and method, the objective simulation method, are summed up by changing the different parameter settings. The results of the model are in agreement with the geological understanding, which provides an accurate geological understanding and basis for the numerical simulation of the remaining oil distribution and oil-water movement in the oil field.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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