孤东油田九区馆上段4-6砂层组隔夹层研究

发布时间：2018-05-20 01:42

本文选题：4-6砂层组 + 河流相　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：孤东油田馆上段为孤东油田的主力含油段,现已进入高吞吐、高特含水阶段,油气采收率低,剩余油在全区广泛分布。其中储层非均质性是控制剩余油分布的主要原因,隔夹层又是导致储层非均质性研究的重要因素,因而有必要对研究区储层隔夹层展开研究。本文综合地质、测井、生产动态等多种资料,,系统的研究了孤东油田九区馆上段4-6砂层组沉积特征、隔夹层岩电特征、识别标准、成因机制、分布特征及隔夹层对剩余油的影响。主要取得了如下研究成果和认识:(1)研究区4-6砂层组为河流相沉积,其中Ng54-Ng6为辫状河沉积,Ng4-Ng52为曲流河沉积。河道规模以42、52、55、61小层发育时期最大,河道砂体广为发育。(2)研究区主要存在泥质隔夹层、物性隔夹层,钙质隔夹层极少发育。通过对取心井物性的研究,建立了隔夹层的电性标准。研究区隔夹层的成因主要包括洪水间歇期、河道迁移、洪水减弱期及水体能量波动等形成的泥粉质隔夹层和无机成岩成因、生物成岩成因的钙质隔夹层。(3)以研究区主力含油小层为例,分析了隔层和夹层的分布特征及与沉积微相的关系。垂向上辫状河隔夹层分布较广,但是稳定性差而曲流河隔夹层分布局限,但是稳定较好。平面上,隔夹层在河道亚相厚度较薄,而在河道边缘及泛滥平原地区隔夹层厚度较大。(4)采用随机建模的方法,应用petrel软件,建立了研究区馆55-61砂层的隔夹层的空间分布模式,将隔夹层具体的分为稳定型、过渡型和随机型三种类型,并总结了不同类型隔夹层的地质特征。(5)隔夹层主要是通过毛细管压力来遮挡油气运移的。稳定性越好、隔夹层位于储层顶部和注水井钻遇隔夹层所形成的剩余油饱和度最高。
[Abstract]:Guanupper member of Gudong Oilfield is the main oil bearing section of Gudong Oilfield. It has entered the stage of high huff and puff and high water cut. The oil and gas recovery is low and the remaining oil is widely distributed in the whole area. The reservoir heterogeneity is the main reason for controlling the distribution of remaining oil, and the intercalation is an important factor leading to the study of reservoir heterogeneity, so it is necessary to study the interlayer between reservoirs in the study area. In this paper, we have systematically studied the sedimentary characteristics, electrical characteristics of intercalation rocks, identification criteria and genetic mechanism of 4-6 sand formation in the upper member of Guanshan formation in Guanshou formation of Gudong Oilfield by synthesizing many kinds of data, such as geology, logging, production dynamics, and so on. Distribution characteristics and the influence of interlayer on remaining oil. The main results of this study are as follows: (1) the 4-6 sand formation in the study area is fluvial facies, and Ng54-Ng6 is braided stream sediment Ng4-Ng52 is meandering stream deposition. In the study area, there are mainly muddy intercalation, physical intercalation and calcareous intercalation. Through the study of the physical properties of coring wells, the electrical property standard of interlayer is established. The causes of the intercalation mainly include the intercalation of flood, the migration of river, the weakening of flood and the fluctuation of water energy, and the genesis of inorganic diagenesis. Taking the main oil-bearing layers in the study area as an example, the distribution characteristics of the intercalation and their relationship with sedimentary microfacies are analyzed. The vertical braided intercalation distributes more widely, but the stability is poor, but the meandering intercalation distribution is limited, but the stability is better. On the plane, the intercalation is thinner in the subfacies of the channel, while in the edge of the river and in the flood plain area, the thickness of the interlayer is larger.) by using the method of stochastic modeling and using the software of petrel, the spatial distribution model of the interlayer of the 55-61 sand layer in the study area is established. The interlayer is divided into three types: stable type, transition type and random type, and the geological characteristics of different types of intercalation are summarized. The interlayer is mainly shielded by capillary pressure to block oil and gas migration. The better the stability is, the highest remaining oil saturation is formed when the interlayer is located at the top of the reservoir and the water injection well is drilled with the separated interlayer.
【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】：TE311;P618.13

【参考文献】