普光气田主体气藏水侵规律及控水对策研究

发布时间：2018-05-19 20:32

本文选题：普光气田 + 边水　；参考：《重庆科技学院》2015年硕士论文

【摘要】：普光气田主体气藏具有埋藏深、储层厚度大、非均质性强、具有边水等特点，气藏特征复杂。气藏见水时的采出程度较低，说明边水比较活跃，活跃的边水增加了气藏长期稳产、高效开发的难度。为了弄清气藏水侵动态特征，明确边水对气藏开发效果的影响，研究边水控制对策，实现气藏高效开发目标，因此开展“普光气田主体气藏水侵规律及控水对策研究”。论文研究以气藏工程、数学物理方程、渗流力学、气藏数值模拟等理论为基础，研究了普光气田主体气藏水侵规律，提出了控水对策。取得的主要成果和认识如下： ①开展了气藏水侵识别、水侵量大小计算、水体大小计算、水体活跃程度评价等研究。研究结果表明：普光气田主体气藏已经发生水侵，截至2014年6月，气藏累计水侵量为0.2107×108m3，水体地下体积为18.10×108m3，水体倍数为4.53倍，气藏水体活跃程度为次活跃。 ②开展了气藏水体分布、水侵模式、水侵影响因素、水侵方向等研究，弄清了气藏水侵规律。研究结果表明：普光气田主体气藏气井水侵模式主要为纵窜横侵复合型，飞一~飞二段边水突进现象比较明显，边水整体上从东向西横向侵入气藏，在P204-2H~P304-1气井附近有从东南向侵入气藏的趋势。 ③建立了气藏数值模拟模型，定量研究了边水对气藏开发效果的影响。研究结果表明：模拟气藏生产20年，受边水影响，气藏稳产期缩短0.83年，预测期末采出程度降低3.64%。 ④开展了气藏水侵特征研究及产水特征分析，提出了优化配产控水、见水井堵水等综合控水对策。研究结果表明：模拟气藏生产20年，气藏水侵以横向水侵为主，主要表现为边水水侵特征，纵向上飞一~飞二段边水突进现象比较明显。气藏产水阶段可划分为高产水和低产水两个阶段。在优化配产控水和见水井堵水的综合控水对策下，气藏稳产期延长0.21年，稳产期末采出程度提高0.4%，预测期末采出程度提高5.22%，开发效果明显改善。
[Abstract]:The main gas reservoir in Puguang gas field is characterized by deep burial, large reservoir thickness, strong heterogeneity, edge water and so on. The low recovery degree of the gas reservoir shows that the edge water is active and the active edge water increases the difficulty of long-term stable production and high efficiency development of the gas reservoir. In order to make clear the dynamic characteristics of water invasion of gas reservoir, clarify the influence of edge water on the development effect of gas reservoir, study the control countermeasure of edge water, and realize the goal of high efficiency development of gas reservoir, "study on water invasion law and water control countermeasure of main gas reservoir in Puguang gas field" is carried out. Based on the theories of gas reservoir engineering, mathematical and physical equations, percolation mechanics and gas reservoir numerical simulation, this paper studies the water invasion law of the main gas reservoir in Puguang gas field, and puts forward the water control countermeasures. The main achievements and insights are as follows: The main contents are as follows: 1. Research on water invasion identification, calculation of water invasion amount and evaluation of water body activity are carried out. The results show that water invasion has occurred in the main gas reservoir of Puguang gas field. Up to June 2014, the accumulative water invasion capacity of the gas reservoir is 0.2107 脳 10 8 m 3, the underground volume of water body is 18 10 脳 10 8 m 3, the water body multiple is 4 53 times, and the active degree of the gas reservoir water body is secondary active. (2) the distribution of water body, the pattern of water invasion, the influencing factors and the direction of water invasion of gas reservoir are studied, and the law of water invasion of gas reservoir is clarified. The results show that the main gas and well water invasion pattern in Puguang gas field is mainly composed of longitudinal channeling and transversal invasion, and the phenomenon of edge water penetration is obvious in the first ~ second section of Feifei, and the edge water invades the gas reservoir laterally from east to west as a whole. In the vicinity of P204-2H~P304-1 gas wells, there is a tendency to intrude from southeast to gas reservoirs. (3) the numerical simulation model of gas reservoir is established, and the effect of edge water on gas reservoir development is studied quantitatively. The results show that the stable production period of the gas reservoir is shortened by 0.83 years and the recovery degree of the gas reservoir is reduced by 3.64% at the end of the prediction period because of the influence of the edge water on the simulated gas reservoir production for 20 years. (4) the characteristics of water invasion and the analysis of water production in gas reservoirs are studied, and the comprehensive water control countermeasures are put forward, such as optimizing production and controlling water, water shutoff in wells and so on. The results show that the water invasion of the gas reservoir is mainly lateral water invasion in the 20 years of simulated gas reservoir production, which mainly shows the characteristics of the edge water invasion, and the phenomenon of edge water penetration in the first ~ second stage of the vertical flight is obvious. The water production stage of gas reservoir can be divided into two stages: high water production stage and low water production stage. Under the comprehensive water control strategy of optimizing distribution and controlling water and plugging water from water wells, the stable production period of gas reservoir is prolonged 0.21 years, the recovery degree of gas reservoir is increased by 0.4 at the end of the stable production period, the recovery degree of prediction period is increased by 5.22, and the development effect is obviously improved.
【学位授予单位】：重庆科技学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE37

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