五星庄区块水驱效果评价及增注措施选择

发布时间：2018-01-16 17:34

本文关键词：五星庄区块水驱效果评价及增注措施选择　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：通过注水井向油层注水补充能量,是保持地层压力,提高油井产量和采收率的重要开发措施。本文针对延长油田五星庄区块注水困难且部分水井长期欠注,严重影响区块注水开发的问题,开展了五星庄区块水驱开发效果评价及注水井增注技术研究。首先系统介绍了五星庄区块的地质特征。根据该区块的注水开发历史和现状,采用单因素法,从水驱储量控制程度、水驱储量动用程度、井网状况、开发指标(存水率、耗水率)、生产状况、油藏合理压力保持水平等几个方面,结合前人给出的评价标准对油藏水驱开发效果进行了评价。通过分析认为该区注水开发过程的主要问题是注水量严重不足,导致地层能量亏空,影响了开发效果。对储层的敏感性进行了分析评价,得出该区各类敏感性程度基本上是弱-中等敏感性。同时对欠注井的井史资料及生产动态资料进行了详细研究,从储层特性、注入水水质等方面分析得出该区注水井欠注的主要原因是注水层岩性物性差、储层敏感性损害、注入水水质不合格以及注入水与储层的不配伍产生的井底污染损害。最后,本文针对该区注水井欠注问题,根据实际井的生产动态,对井口压力高,注水量少的注水井,采用酸化、压裂等降压增注措施改善地层渗透性,提高吸水能力,实现增注目的；对井口压力低、注水量少的注水井,采用单井增压增注技术来提高注水量。通过现场应用表明,选择的增注措施施工效果较好,能有效解决注水井欠注问题,改善区块注水状况。
[Abstract]:It is an important development measure to maintain formation pressure and improve oil production and recovery by injecting water into reservoir through water injection well. This paper aims at the difficulty of water injection in Wuxingzhuang block of Yanchang Oilfield and the long-term underinjection of some wells. The water flooding effect evaluation and injection increasing technology of water flooding wells in Wuxingzhuang block are studied. Firstly, the geological characteristics of Wuxingzhuang block are systematically introduced. According to the history and present situation of waterflooding development in this block, the single factor method is used to analyze the control degree of water drive reserves, the production degree of water drive reserves and the situation of well pattern. Development indicators (water storage rate, water consumption rate, production situation, reservoir reasonable pressure to maintain the level of several aspects. Based on the evaluation criteria given by predecessors, the reservoir water drive development effect is evaluated. It is considered that the main problem in the process of water flooding development in this area is the serious shortage of water injection, which leads to the formation energy deficit. It affects the development effect. The sensitivity of reservoir is analyzed and evaluated, and it is concluded that all kinds of sensitivity in this area are basically weak-medium sensitivity. At the same time, the well history data and production performance data of underinjection wells are studied in detail. From the analysis of reservoir characteristics and injection water quality, it is concluded that the main causes of underinjection of water injection wells in this area are poor lithology and physical properties of water injection layers and damage of reservoir sensitivity. The water quality of injected water is not up to standard and the bottom-hole pollution damage caused by incompatibility of injected water with reservoir. Finally, according to the production performance of actual wells, this paper uses acidizing and fracturing to improve formation permeability for water injection wells with high wellhead pressure and low injection rate. To improve the water absorption ability and realize the increasing attention; For the injection wells with low wellhead pressure and low injection rate, a single well pressurization and injection increasing technique is adopted to increase the injection rate. The field application shows that the operation effect of the selected injection increase measures is good, and the problem of under-injection of water injection wells can be effectively solved. Improve the water injection situation in the block.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.6

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