基于流管法平—直联合开发井网水平井开发规律研究

发布时间：2018-08-06 08:46

【摘要】：随着现代社会以及工业的快速发展,石油能源的需求量居高不下,大量的新区块投入开发,老油田深入开展挖潜工作。其中水平井开发技术作为新油田产能建设、老油田调整挖潜,少井高效开发的一项重要技术得到了大量而广泛的应用。然而,近几年随着国际油价的不断下跌,石油能源开采成本居高不下,大量低效井被迫关闭,油田为保证产量及效益将目光投向更多的高效益开发井。现有研究表明,采用平-直联合开发能够获得较好的开发效果,为实现后续高效开发需要开展平-直联合开发的相关研究。首先本文以分析平-直联合开发井网水平井的开发规律为最终研究目的,建立了三种不同完井方式(裸眼完井、射孔完井以及压裂改造完井)和三种不同井网形式(二注井网、三注井网以及四注井网)的平-直联合开发井网渗流的模型,绘制了不同平-直联合开发井网模型的流线,分析平-直联合开发井网水平井的流线特征以及渗流特征,采用流管法实现平-直联合开发井网油水两相渗流模型的求解,给出了平-直联合开发井网水平井的开发指标计算方法。其次,本文以裸眼完井、射孔完井和压裂完井三种完井方式为主,进一步分析水平段长度、井距、排距,射孔段数、射孔位置以及裂缝半长和裂缝条数等因素对于水平井开发规律的影响效果,给出了特定完井方式及井网条件下相关参数对于水平井开发指标的影响规律。最后,在以上研究的基础上,结合某外围油田平-直联合开发水平井井网形式以及完井情况,应用流管法分别计算并且给出了不同储层(渗透率级别分别为10、40、70×10-3μm2)、不同井网形式(二注井网、三注井网以及四注井网)、不同完井方式(射孔完井以及压裂改造完井)的平-直联合开发井网的产量递减率变化规律、含水上升率的变化规律以及产液量的变化规律。在此基础上,本文的研究内容旨在丰富相关水平井开发指标模拟研究成果,为平-直联合开发方案的制定提供理论支持和科学依据。
[Abstract]:With the rapid development of modern society and industry, the demand for petroleum energy remains high, a large number of new blocks are put into development, and the old oil fields carry out the work of tapping potential in depth. Horizontal well development technology as a new oilfield productivity construction, the adjustment of the old oil fields to tap potential, efficient development of small wells an important technology has been a large number of and widely used. However, with the decline of international oil price in recent years, the cost of oil and energy exploitation remains high, and a large number of inefficient wells have to be closed. In order to ensure the production and efficiency of oil fields, more and more high-benefit development wells will be focused on. The existing studies show that the use of flat-direct joint development can achieve better development results, in order to achieve the follow-up high-efficiency development needs to carry out the related research of flat-direct joint development. Firstly, in order to analyze the development rule of horizontal well pattern, three different completion methods (open hole completion, perforation completion and fracturing completion) and three different well patterns (two injection pattern) are established in this paper. The model of percolation of horizontal and direct development wells with three injection pattern and four injection well pattern is used to draw the streamlines of different well pattern models, and to analyze the streamline characteristics and percolation characteristics of horizontal wells in horizontal well pattern of horizontal well pattern with three injection wells and four injection wells. The flow tube method is used to solve the oil-water two-phase percolation model in the pattern of flat and straight development wells, and the calculation method of development index of horizontal wells in the pattern of flat and straight development wells is given. Secondly, this paper mainly consists of three kinds of completion methods: open hole completion, perforation completion and fracturing completion. Further analysis of horizontal section length, well spacing, row spacing, perforation section number, The effects of perforation location, fracture half length and fracture number on the development of horizontal wells are discussed. The effects of certain completion modes and related parameters on the development indexes of horizontal wells are given. Finally, on the basis of the above research, combined with the horizontal well pattern and completion situation of a certain peripheral oilfield, The flow tube method is used to calculate and give different reservoirs (permeability level is 1040 脳 10 ~ (-3) 渭 m ~ (2) and different well pattern (two-injection pattern). The variation law of production decline rate, water cut rise rate and fluid production rate of different completion patterns (perforation completion and fracturing completion) are discussed in three injection pattern and four injection well pattern, and the variation law of production decline rate, water cut rise rate and fluid production rate of flat and straight development well pattern with different completion modes (perforation completion and fracturing completion). On this basis, the purpose of this paper is to enrich the related horizontal well development index simulation research results, and to provide theoretical support and scientific basis for the formulation of the flat-straight joint development plan.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE312

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