南堡油田1-3人工岛气举采油工艺技术研究

发布时间：2018-05-20 08:09

本文选题：气举采油 + 气举设计方法　；参考：《西南石油大学》2015年硕士论文

【摘要】：气举采油技术是当前重要的人工举升技术之一,在国内外有着广泛的应用。本文通过研究整体气举采油技术在南堡1-3人工岛的应用,总结出了包括大斜度井气举采油设计方法、配套工具和工艺管柱、气举井工况诊断方法以及系统效率评价和优化配气方法等在内的一整套气举采油技术,为今后气举技术在南堡油田1-3人工岛的继续推广提供了支撑。对于气举采油技术在滩海油田的推广应用有着重要的指导意义。本文以南堡油田1-3人工岛整体气举采油平台为例,研究气举采油技术在滩海大斜度井中应用时的气举设计、井下工具选择、工艺优选、工况诊断、系统效率评价以及优化配气等重要环节,旨在研究总结出一套适合南堡油田1-3人工岛的气举采油技术、并推动技术进步。本文运用了物理模拟实验,计算机模拟实验以及现场实验等多种方法,内容围绕大斜度井多相管流压力温度计算方法优选、大斜度井气举工艺管柱及工具研究、气举配套技术以及系统效率评价和优化配气方法研究等几个方面进行。主要进展有：(1)对南堡油田气举井的多相管流流型进行了分析总结,结合不同倾角下气液两相流物理模拟实验结果和现场实际井况,对多相管流公式进行了评价优选,确定了适合南堡油田的不同井斜角的多相管流公式,精确预测不同井斜角下的井筒压力温度分布,并以此为基础形成了大斜度井气举设计方法,通过大量的现场应用,证明该设计方法满足工程设计需要。(2)根据南堡油田气举井的井况及气举工具应用经验,优选了大斜度井气举井下工具,并提出了适应不同井斜角的多种气举采油工艺管柱,满足了油田不同井况,不同生产目的的需求。(3)总结优选出了包括大斜度井气举工况诊断技术,气举井清防蜡技术等在内的适合滩海人工岛整体气举的配套工艺技术,这些技术保证了整个人工岛气举井的协调生产运行。(4)对南堡油田气举井系统效率进行了分析和总结,确定了适合油田的气举井系统效率评价方法,为单井、井组以及整个区块的优化配气提供了依据,节省高压举升气体的同时,提高了系统效率及产量。自2014年至今,南堡1-3人工岛持续开展气举井单井及区块优化配气,共进行10次大规模区块配气和908井次单井注气调整,累计增油3140.9吨,举升效率提高了5%。取得了明显的的效果。
[Abstract]:Gas lift oil recovery technology is one of the most important artificial lift technologies, which is widely used at home and abroad. By studying the application of integral gas lift oil recovery technology in Nanbao 1-3 artificial island, this paper summarizes the design method, matching tools and technological pipe string of gas lift oil recovery including large slope wells. A whole set of gas-lift oil recovery techniques, such as the diagnosis method of gas lift well operating conditions, the evaluation of system efficiency and the optimization of gas distribution method, provide support for the further popularization of gas lift technology in 1-3 artificial island of Nanpu Oilfield in the future. It has important guiding significance for the application of gas lift oil recovery technology in beach oil field. In this paper, the gas lift design, downhole tool selection, process optimization and working condition diagnosis of gas lift oil recovery technology applied in large slope wells in beach sea are studied by taking 1-3 artificial island gas lift oil recovery platform in Nanbao Oilfield as an example. The evaluation of system efficiency and the optimization of gas distribution are aimed at studying and summing up a set of gas-lift oil recovery technologies suitable for 1-3 artificial islands in Nanpu Oilfield and promoting technological progress. In this paper, physical simulation experiments, computer simulation experiments and field experiments are used to optimize the calculation methods of pressure and temperature of multiphase pipe flow in large deviated wells, and to study the gas lift technology string and tools in high inclination wells. Gas lift supporting technology, system efficiency evaluation and optimization of gas distribution methods were studied. The main progress is as follows: (1) the multiphase pipe flow pattern of the gas lift well in Nanbao Oilfield is analyzed and summarized. Combined with the physical simulation results of gas-liquid two-phase flow under different dip angles and the actual well conditions in the field, the formula of multiphase pipe flow is evaluated and optimized. The formula of multiphase pipe flow suitable for different well angles in Nanbao Oilfield is determined, and the pressure and temperature distribution of wellbore under different inclined angles is accurately predicted. Based on this formula, a gas lift design method for large inclined wells is formed, which is applied in a large number of fields. It is proved that the design method meets the engineering design needs. (2) according to the well condition of the gas lift well in Nanbao Oilfield and the application experience of the gas lift tool, the gas lift downhole tool for the high slope well is selected, and several kinds of gas lift production process string adapted to the different inclined angle of the well are put forward. To meet the requirements of different well conditions and different production purposes in oil fields, the paper summarizes and selects a complete set of technologies suitable for the integrated gas lift of artificial islands in the beach, including the diagnosis technology of gas lift working conditions of large inclined wells and the technology of cleaning and preventing wax of gas lift wells, etc. These techniques ensure the coordinated operation of the whole artificial island gas lift well. The efficiency of the gas lift well system in Nanbao Oilfield is analyzed and summarized, and the evaluation method of the gas lift well system efficiency suitable for the oilfield is determined, which is a single well. The optimized gas distribution of the well group and the whole block provides the basis for saving the high pressure lift gas and improving the system efficiency and output. Since 2014, Nanbao 1-3 artificial Island has continuously developed single well and block optimization of gas distribution, carried out 10 large-scale block gas distribution and 908 single well gas injection adjustment, increased oil production by 3140.9 tons, and raised lifting efficiency by 5 tons. Obvious results have been achieved.
【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】：TE355.3

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