马古中生界潜山注水开发方案研究

发布时间：2019-06-15 05:06

【摘要】：马古中生界潜山油藏是辽河油田近几年新发现的一个裂缝型块状底水油藏。该块埋藏深,储层均在3800m以上,主要发育角砾岩,非均质性强,具有双重介质特征,裂缝以中高角度缝为主,根据断层发育状况,油藏油藏可分为5个独立的小断块。自2009年投入开发以来,采用一套层系近正方形井网,350~500m井距进行整体部署,初期获得了较高的产能,峰值采油速度高达1.9%,取得了较好的开发效果。由于采用天然能量开发,加之底水不活跃,在达到峰值产量后产量迅速递减,急需补充地层能量,保持产量稳定。本课题研究中,在精细地质体认识的基础上,通过分析目前区块油井的开发特点,采用类比法、经验公式计算法和油藏数值模拟等方法,开展相关的油藏工程设计研究,明确了注水开发的可行性。在此基础上,对注水时机、注水方式、注入压力、注入能力、注水水质以及压力保持水平等水驱相关参数进行了优化设计,对5个小断块进行逐一分析,个性化设计,同时灵活运用直井和水平井进行注水开发,在保证注水效果。方案共设计油井15口,注水井6口(含水平井1口),明确了马古6和马古6-2区块尽快投注,其余区块择机注水的方式,方案实施后预计采油速度保持1%稳产5年,预计十年采出程度14.9%,实现整个潜山的有效开发。本课题的研究对提高辽河双重介质块状油藏的开发效果具有积极的意义,该项研究在辽河油田具有十分广阔的应用空间和价值,对于今后潜山油藏注水开发起着积极的指导和推动作用。
[Abstract]:Maogusheng buried hill reservoir is a newly discovered fracture type massive bottom water reservoir in Liaohe Oilfield in recent years. The reservoir is buried deep and the reservoirs are all above 3800m. Breccia is mainly developed with strong heterogeneity and double medium characteristics. The fractures are mainly medium and high angle fractures. According to the fault development, the reservoir can be divided into five independent small fault blocks. Since it was put into development in 2009, a set of layer system near square well pattern and 350 m well spacing have been used for overall deployment, and higher productivity has been obtained at the initial stage, and the peak oil recovery rate has reached 1.9%, and good development results have been obtained. Due to the use of natural energy development and the inactivity of bottom water, the output decreases rapidly after reaching the peak output, so it is urgent to replenish formation energy and keep the production stable. In this study, on the basis of the understanding of fine geological bodies, by analyzing the development characteristics of oil wells in the current block, using analogy method, empirical formula calculation method and reservoir numerical simulation methods, the related reservoir engineering design research is carried out, and the feasibility of water injection development is clarified. On this basis, the related parameters of water drive, such as water injection timing, water injection mode, injection pressure, injection capacity, water quality and pressure maintenance level, are optimized. Five small fault blocks are analyzed one by one, personalized design, and flexible use of straight wells and horizontal wells for water injection development, in order to ensure the effect of water injection. A total of 15 oil wells and 6 water injection wells (including 1 horizontal well) are designed. It is clear that the block of Magu 6 and Magu 6 is injected as soon as possible, and the mode of water injection in other blocks is selected. After the implementation of the scheme, the production rate is expected to remain 1% stable for 5 years, and the recovery degree is expected to be 14.9% in ten years, so as to realize the effective development of the whole buried hill. The research in this paper is of positive significance to improve the development effect of Liaohe dual medium block reservoir. This study has a very broad application space and value in Liaohe Oilfield, and plays a positive role in guiding and promoting the water injection development of buried hill reservoir in the future.
【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】：TE357.6

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