一棵树油田构造与沉积微相特征研究

发布时间：2018-05-28 23:20

本文选题：一棵树油田 + 小层划分对比　；参考：《东北石油大学》2015年硕士论文

【摘要】：一棵树油田位于吉林省镇赉县境内,是1988年开发的老油田,经过近25年的开发,目前油田已经进入了特高含水开发期。在开发过程中出现了采出程度低,采油速度小,开发效果不好等现象,导致这些现象的原因主要是分层认识不清,油层顶面构造特征认识不清,沉积环境及砂体分布规律认识不清等。本论文研究目的是通过对构造和沉积微相特征的研究,对有利区进行预测,提出扩边井井位及小层补射孔建议,以完善井网合理性,提高控制储量。本论文主要针对一棵树油田萨尔图油层和高台子油层地层分层认识不清,油层顶界面构造认识不清,沉积环境及砂体分布认识不清等问题,应用各种井下的地质测井等资料,以层序地层学理论为指导,采用了标准层控制下相控为基础的小层对比方法对地层进行精细的划分与对比。用密井网测井资料及补射孔资料综合地震资料解释成果,得到一棵树油田萨尔图油层和高台子油层的顶面构造图。通过对一棵树油田的沉积背景、相标志、等方面的研究结合研究区的资料分析,确定研究区储层的沉积相,即一棵树油田的萨尔图、高台子油层为扇三角洲前缘亚相沉积,研究一棵树油田的沉积微相平面及空间的展布特征,分析储层的沉积演化过程。利用一棵树油田构造和沉积微相特征及油水分布规律结合研究区动态生产资料,对一棵树油田进行有利区预测。通过本论文的研究工作,将一棵树油田萨尔图油层划分为5个小层;将高台子油层划分为20个小层。落实萨尔图油层及高台子油层的顶面构造。在研究区范围内识别出三种沉积微相,即水下分流河道、水下溢岸薄层砂及水下支流间湾。提出了加密井、扩边井井位建议以及小层补射孔建议。
[Abstract]:Yigeshu Oilfield, located in Zhenlai County, Jilin Province, is an old oil field developed in 1988. After nearly 25 years of development, the oilfield has entered the stage of super high water cut development. In the process of development, some phenomena such as low recovery degree, low oil recovery rate and poor development effect have occurred. The main causes of these phenomena are that the recognition of stratification is not clear, and the structural characteristics of the top surface of oil reservoir are not clear. The sedimentary environment and the distribution of sand bodies are not well understood. The purpose of this paper is to predict the favorable area by studying the characteristics of structure and sedimentary microfacies, and to put forward the suggestion of expanding the well position and small layer to make up the perforation, so as to improve the rationality of well pattern and increase the controlled reserves. In this paper, aiming at the problems of unclear stratigraphic recognition of Saltu and Gaotaizi reservoirs, unclear understanding of the top interface structure of reservoir, and unclear understanding of sedimentary environment and sand body distribution, various downhole geological logging data are applied in this paper. Based on the theory of sequence stratigraphy, the fine division and correlation of stratigraphy are carried out by using the method of stratigraphic correlation based on facies control under the control of standard layers. Based on the comprehensive seismic interpretation results of dense well pattern logging data and supplementary perforation data, a top structure map of Saltu and Gaotaizi reservoirs in Gaoshu Oilfield is obtained. Based on the study of the sedimentary background, facies markers, and other aspects of the oil field, combined with the analysis of the data in the study area, the sedimentary facies of the reservoir in the study area were determined, that is, the Saltu of the Yakusu Oilfield, the Gaotaizi reservoir being subfacies of the fan delta front. The distribution characteristics of sedimentary microfacies plane and space are studied and the sedimentary evolution process of the reservoir is analyzed. Based on the characteristics of structure and sedimentary microfacies and the distribution of oil and water in Yigeshu Oilfield, the favorable area of Yigeshu Oilfield is predicted by combining the dynamic data of production in the study area. Through the research work in this paper, the Saartu reservoir in Yigeshu Oilfield is divided into 5 sublayers, and the Gaotaizi reservoir is divided into 20 sub-layers. Implement the top structure of Saltu reservoir and Gaotaizi reservoir. Three kinds of sedimentary microfacies were identified in the study area, namely, the underwater distributary channel, the underwater overflowing bank thin sand and the underwater tributary bay. The suggestions of infill well, extended well position and small layer perforation are put forward.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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