吉拉克边底水凝析气藏可采储量标定方法研究

发布时间：2018-07-06 07:51

本文选题：凝析气藏 + 可采储量　；参考：《西南石油大学》2015年硕士论文

【摘要】：近年来,随着勘探开发的深入,我国发现了许多边底水凝析气藏,因该类凝析气藏具有较高的开发价值,越来越受到人们的高度重视。但是,目前国内缺乏完善的标定凝析气藏可采储量的方法。针对塔里木吉拉克边底水凝析气藏多次进行可采储量评价差距很大,效果不理想的情况,亟需研究出一套较完整、系统的凝析气藏可采储量标定方法。本论文在调研大量国内外凝析气藏文献的基础上,主要利用现代油气臧工程技术理论,综合运用气藏工程、试井分析等学科理论与方法,结合吉拉克凝析气藏的静态资料和动态开采特征,主要开展了以下几个方面的研究,并取得了相应成果： (1)剖析各种废弃条件方法的适用条件,总结出适用于吉拉克边底水凝析气藏废弃条件标定的6种方法：4种废弃压力标定方法和2种废弃产量标定方法。最终优选出埋藏深度折算法和综合分析法(经济—产能方程—井底流压法)。 (2)分别从干气和凝析油两方面,对国内外凝析气藏采收率标定方法进行调研。总结出类比法、经验公式法、解析法和汉格特(Hagoot)物质平衡法共4类方法,并深入剖析以上方法的优缺点。最终优选出更符合凝析气藏独特热力学性质的Hagoot法分别标定吉拉克凝析气藏的干气和凝析油采收率。 (3)在参阅天然气可采储量标定方法标准的基础上,对目前国内外凝析气藏可采储量传统标定方法进行了归纳总结,包括容积法、物质平衡法、压力恢复曲线法、衰减曲线法、水驱特征曲线法等,并对现有的计算凝析气藏可采储量方法中存在的不足进行了改进。从理论上推导了考虑反凝析现象的边底水带油环凝析气藏的物质平衡方程。同时将凝析气藏物质平衡线性方程与二项式产能修正方程相结合,改进了物质平衡与产能方程结合法。探索了井口压力与累积凝析气当量的线性关系,改进动态递减法使其直接可以分别求得凝析油可采储量和凝析气可采储量。采用线性试差法对预测模型法标定可采储量进行求解。提出了对于凝析气藏进入递减阶段之后,应用胡-陈-张(HCZ)预测模型法将干气和凝析油产量分别作为独立对象进行研究,直接计算干气和凝析油的可采储量。引入凝析气地层体积系数,改进了虚拟曲线法,改进后的虚拟曲线法计算得到的废弃压力比改进前更高,可采储量更小,更适用于凝析气藏。采用吉拉克凝析气藏实际生产数据对上述方法进行实例验证,分析评价各方法在吉拉克凝析气藏的适用性,并剖析各方法的利弊,最终优选出适用于吉拉克凝析气藏可采储量标定方法的次序。本论文对衰竭式开发方式下边底水凝析气藏可采储量标定方法的研究,对同类型凝析气藏可采储量的标定工作具有一定的指导意义和实用价值。
[Abstract]:In recent years, with the development of exploration and development, many side and bottom water condensate gas reservoirs have been discovered in China. Because of their high development value, more and more people attach importance to them. However, there is no perfect method for calibrating recoverable reserves of condensate gas reservoirs in China. In view of the fact that the recoverable reserves of Gerac side and bottom water condensate gas reservoirs in Tarim are not well evaluated many times, it is urgent to develop a complete and systematic method for the calibration of recoverable reserves of condensate gas reservoirs. Based on the investigation of a large number of domestic and international condensate gas reservoir literature, this paper mainly uses the theory of modern oil and gas reservoir engineering technology, comprehensive application of gas reservoir engineering, well test analysis and other disciplines theory and method. Based on the static data of Gerac condensate gas reservoir and the characteristics of dynamic production, the following aspects are mainly studied, and the corresponding results are obtained: (1) analyzing the applicable conditions of various methods of abandoned conditions, This paper summarizes six methods: 4 waste pressure calibration methods and 2 abandoned yield calibration methods which are suitable for calibrating waste condition of Jilak edge and bottom water condensate gas reservoir. In the end, burial depth conversion method and comprehensive analysis method (economic-productivity equation-bottom hole flow pressure method). (_ 2) are selected to investigate recovery calibration methods of condensate gas reservoirs at home and abroad from dry gas and condensate oil, respectively. This paper summarizes four kinds of methods, such as analogy, empirical formula, analytical method and Hagoot's material balance method, and deeply analyzes the advantages and disadvantages of the above methods. Finally, Hagoot method, which is more suitable for the unique thermodynamic properties of condensate gas reservoir, is selected to calibrate dry gas and condensate oil recovery of Gerac condensate gas reservoir respectively. (3) based on the standard of calibration method for recoverable reserves of natural gas, The traditional calibration methods for recoverable reserves of condensate gas reservoirs at home and abroad are summarized, including volume method, material balance method, pressure recovery curve method, attenuation curve method, water drive characteristic curve method, etc. The existing methods for calculating recoverable reserves of condensate gas reservoirs are improved. In this paper, the material balance equation of the oil ring condensate gas reservoir with edge and bottom water belt considering the reverse condensation phenomenon is derived theoretically. At the same time, combining the linear equation of condensate gas reservoir material balance with the binomial productivity correction equation, the combination method of material balance and productivity equation is improved. The linear relationship between wellhead pressure and cumulative condensate gas equivalent is explored and the recoverable reserves of condensate oil and recoverable condensate gas can be obtained directly by improving the dynamic decline method. The linear trial difference method is used to calculate the recoverable reserves by the prediction model method. It is proposed that after the condensate gas reservoir enters the stage of decline, the production of dry gas and condensate oil will be studied separately by the prediction model of Hu Chen Zhang (HCZ), and the recoverable reserves of dry gas and condensate oil will be calculated directly. The volume coefficient of condensate gas formation is introduced and the virtual curve method is improved. The abandoned pressure calculated by the improved virtual curve method is higher and the recoverable reserves are smaller than before, which is more suitable for condensate gas reservoirs. The practical production data of Gerac condensate gas reservoir are used to verify the above methods, the applicability of each method in Gerac condensate gas reservoir is analyzed and the advantages and disadvantages of each method are analyzed. Finally, the order of recoverable reserves calibration method suitable for Jirac condensate gas reservoir is selected. This paper studies the method of the recoverable reserve of the condensate gas reservoir with bottom water under the depleted development mode, and has certain guiding significance and practical value for the calibration of the recoverable reserve of the same type condensate gas reservoir.
【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】：P618.13

【参考文献】