扶杨特低渗透油层矩形井网大型整体压裂技术研究

发布时间：2018-03-27 20:28

本文选题：特低渗透　切入点：压裂　出处：《东北石油大学》2017年硕士论文

【摘要】：大庆外围油田经过20多年的开采,已形成了一系列配套的采油工艺技术,包括:酸化、压裂、小井眼采油、微生物吞吐采油等,此套技术为外围油田继续增产提供了有力的技术保障。然而,在目前的技术经济条件下,还有3.7×108t的难采储量不能有效动用,其中肇州油田未动用储量1.1×108t,约占1/3。因此,提高储量的动用程度,对扶杨油层大规模开发具有重要意义。根据研究目的,本文共有4部分内容。第一部分:开展了扶杨特低渗透油层地质条件的研究,该部分包括主要地质特点、开采现状;第二部分:从非达西渗流的基本公式出发,运用流管积分方法分别建立了一套面积井网和矩形井网条件下的非达西渗流的产量计算模型;第三部分:对岩心进行了室内实验,系统评价特低渗透扶杨油层的物性和渗流特征,发现其微观机理;第四部分:通过现场试验,进行矩形井网大型压裂前期评价研究和矩形井网大型压裂工艺研究,提出薄互层矩形井网、整体压裂开发配套技术。通过本文研究,在以产量最大化作为考核标准的前提下,进行了主要包括井网形式、井排方向、经济极限井网密度、井距、排距等因素的井网优化,得到了开发井部署方案。而压裂总体方案设计则进行了油水井压裂规模的优化,采用与储层配伍性较好的低伤害压裂液和高效助排技术,提高了压裂效果。试验区矩形井网大规模压裂试验的成功,为扶杨油层的有效动用提供了新的开发手段。
[Abstract]:After more than 20 years of exploitation, Daqing Peripheral Oil Field has formed a series of matching oil recovery technologies, including acidification, fracturing, small hole oil recovery, microbial stimulation and so on. This set of technologies has provided a powerful technical guarantee for further increasing production in peripheral oil fields. However, under the present technical and economic conditions, there are still 3.7 脳 108 tons of hard-to-recovery reserves that cannot be effectively utilized, of which the unproduced reserves of Zhaozhou Oilfield are 1.1 脳 108 t, accounting for about 1 / 3 of the total. It is important for the large-scale development of Fuyang reservoir to improve the production degree of reserves. According to the purpose of the research, there are four parts in this paper. The first part: the geological conditions of Fuyangte low permeability reservoir are studied. The second part: from the basic formula of non-Darcy percolation, a set of non-Darcy percolation production calculation model under the condition of area well pattern and rectangular well pattern is established by using the flow tube integral method. The third part: the laboratory experiments on the core were carried out to systematically evaluate the physical properties and seepage characteristics of the ultra-low permeability Fuyang reservoir and to find out its microscopic mechanism. In this paper, the preliminary evaluation of large scale fracturing in rectangular well pattern and the research on large scale fracturing technology in rectangular well pattern are carried out, and the rectangular well pattern with thin interbed and integral fracturing development matching technology is put forward. Through the research of this paper, under the premise of taking maximum production as the test standard, By optimizing well pattern including well pattern form, well layout direction, economic limit well pattern density, well spacing, spacing and other factors, the development well deployment scheme is obtained, while the overall fracturing scheme design is optimized for fracturing scale of oil and water wells. The application of low damage fracturing fluid and high efficiency drainage aid technology, which is compatible with reservoir, improves the fracturing effect. The success of large-scale fracturing test in rectangular well pattern in the experimental area provides a new development method for the effective production of Fuyang reservoir.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357

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