双6储气库钻采工程设计研究

发布时间：2018-05-31 14:25

本文选题：天然气 + 储气库　；参考：《东北石油大学》2015年硕士论文

【摘要】：地下储气库作为天然气输气管网系统调峰设施,同时也是一种事故应急和战略储备的手段。储气库作为天然气储运系统的重要配套设施,建设技术要求较高,其选址目前比较普遍的是利用地下盖层发育完整的地层作为储集层,也有少数利用人工洞穴的作为储集腔。在用气量少的季节,从气井注人到地下储集层或人工洞穴中储存起来,在用气量大,管道系统供气能力不足或突发事故时,再从气井中开采出来,经过净化,返输至管道系统,满足管道系统在特殊情况下增大供气能力需求。地下储气库选址大多是利用已有的枯竭油气藏、含水层或盐穴等地质盖层完善的地层改建而成,其中利用枯竭油气藏改建地下储气库因地层情况比较明确,具有技术成熟、投资小、建设期短的优点,世界上有近80%的储气库应用这种建库模式。本文根据双6区块储层地质特点,结合油气藏开发规律,按照双6储气库调峰能力建设要求,通过合理设计注采井井眼轨迹、井身结构、完井工艺方案、优化射孔工艺参数、优化注采管柱、井下工具等,对注采管柱受力分析及强度校核,对产能、临界携液、冲蚀影响和井筒条件等影响因素综合分析,满足强注强采的工况要求,同时对后期生产可能出现的风险进行了分析,制定了解决预案,为下一步储气库投产运行奠定了基础。该设计已成功应用于双6储气库钻采工程施工,得到了较好的验证,其研究成果对于我国今后枯竭油气藏改建地下储气库,钻采工程设计、施工、分析评价等方面具有一定的借鉴意义。
[Abstract]:As a peak-shaving facility of natural gas transmission pipeline system, underground gas storage is also a means of accident emergency and strategic reserve. As an important supporting facility of natural gas storage and transportation system, gas storage has high technical requirements. At present, it is common to use the intact stratum developed by underground caprock as reservoir, and a few artificial caverns are used as reservoir cavity. In the season when the amount of gas used is low, it is stored in underground reservoirs or artificial caves from gas well injectors. In the case of large gas consumption, insufficient gas supply capacity of the pipeline system or sudden accidents, it is then extracted from the gas well, purified and transported back to the pipeline system. To meet the pipeline system under special circumstances to increase the capacity of gas supply requirements. The location of underground gas storage is mostly formed by reconstruction of existing depleted reservoirs, aquifers or salt caprocks, etc. Among them, the reconstruction of underground gas storage by using depleted oil and gas reservoirs is technically mature because of the clear stratigraphic conditions. The investment is small and the construction period is short. Nearly 80% of the world's gas storage uses this model. According to the reservoir geological characteristics of Shuang 6 block, combined with the development law of oil and gas reservoir, according to the requirements of peak shaving ability construction of Shuang 6 gas storage reservoir, this paper optimizes perforation parameters by reasonably designing wellbore trajectory, wellbore structure and completion process scheme. Optimization of injection-production string, downhole tools and so on, force analysis and strength check of injection-production string, comprehensive analysis of influencing factors such as productivity, critical liquid carrying, erosion effect and wellbore condition, etc., to meet the requirements of strong injection and strong production conditions. At the same time, the possible risks in the later production are analyzed, and the preliminary plan is worked out, which lays the foundation for the production and operation of the gas storage reservoir in the next step. The design has been successfully applied to the drilling and production engineering of Shuang6 gas storage depot, and has been well verified. The research results can be used to reconstruct underground gas storage, design and construction of drilling and production engineering for depleted oil and gas reservoirs in China in the future. The analysis and evaluation have certain reference significance.
【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】：TE822

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