黄龙场长兴组气藏开发调整对策研究

发布时间：2018-02-22 18:28

本文关键词： 动态开发特征水侵规律剩余储量开发潜力调整对策　出处：《重庆科技学院》2017年硕士论文　论文类型：学位论文

【摘要】：黄龙场长兴组气藏是典型的碳酸盐岩岩性圈闭气藏,具有埋藏深,非均质性强等特点。该气藏2003年4月投产开发以来,面临产量递减快、水侵严重等问题,导致对气藏剩余储量分布认识不清,后期开发调整困难。因此,为合理开发该气藏,提高气藏的采出程度,制定气藏的开发调整对策就显得十分重要。本文以黄龙场长兴组气藏的静、动态资料为基础,采用理论研究与数值模拟研究相结合的思路,综合应用渗流力学、气藏工程、现代数学、数值模拟技术等多学科理论与技术。首先基于渗流力学理论建立符合气藏的产能评价模型,分析气藏的递减规律和气井动用储量,研究气藏的动态开发特征,评价气藏开发效果;其次,通过气藏工程和数值模拟方法研究气藏的水侵量、水体大小、水体活跃程度以及影响气藏水侵的主要因素,揭示气藏的水侵规律;再次,通过建立数值模拟模型研究气藏剩余气的分布特征,获得气藏的开发潜力;进而,制定气藏合理开发调整对策,并进行指标预测,优选出最佳调整方案。通过研究取得的创新点及主要成果如下:(1)建立了适合于有水气藏的产水气井产能计算模型,弄清了水气比对气井无阻流量的影响规律,获得气藏无阻流量与水气比变化关系函数。(2)建立了边水气藏气井见水机理模型,模拟带有边水气井动态,认识边水运动规律及影响边水气藏水侵的主要因素。(3)弄清了黄龙场长兴组气藏的水侵特征,总体表现为构造南翼和北翼较低位置的黄龙001-X1井和黄龙004-X3井已发生明显的水侵,南部水体比北部活跃。(4)弄清了黄龙场长兴组气藏的剩余气分布规律,主要分布在气藏中部和高部位处,剩余储量36.63×10~8m~3。(5)制定气藏优化配产和排水采气的综合开发调整对策,预测15年,预测期末累产气量59.98×10~8m~3/d,采出程度74.49%,累产气量较目前生产状况生产提高了1.92×10~8m~3/d,采出程度提高了2.10%。边水前缘推进到黄龙001-X1井生产层段以后,没有进一步向前推进,减轻了对其它生产井的危害,气藏开发效果得到一定改善。
[Abstract]:The Changxing formation gas reservoir in Huanglongchang is a typical carbonate lithologic trap gas reservoir with the characteristics of deep burial and strong heterogeneity. Since the reservoir was put into production in April 2003, it has been faced with the problems of rapid production decline and serious water invasion. As a result, the distribution of the remaining reserves of the gas reservoir is not clear, and it is difficult to adjust the later development. Therefore, in order to develop the gas reservoir reasonably, the recovery degree of the gas reservoir can be improved. On the basis of static and dynamic data of Changxing formation gas reservoir in Huanglong Chang Chang formation, this paper combines theoretical research with numerical simulation study, synthetically applies percolation mechanics and gas reservoir engineering. Modern mathematics, numerical simulation technology and other multi-disciplinary theories and techniques. Firstly, based on the theory of percolation mechanics, the productivity evaluation model of gas reservoir is established, and the law of gas reservoir decline and the production reserves of gas well are analyzed, and the dynamic development characteristics of gas reservoir are studied. Secondly, through gas reservoir engineering and numerical simulation methods to study the water invasion, water body size, water body activity and the main factors affecting gas reservoir water invasion, to reveal the gas reservoir water invasion law. Through the establishment of numerical simulation model to study the distribution characteristics of residual gas in gas reservoir, the development potential of gas reservoir is obtained, and then, the reasonable development adjustment countermeasures of gas reservoir are worked out, and the indexes are forecasted. According to the innovation points and main results obtained by the research, the productivity calculation model of water-producing gas wells suitable for water-producing gas reservoirs is established, and the influence law of water-gas ratio on the unobstructed flow rate of gas wells is clarified. The relation function of unhindered flow rate and water-gas ratio in gas reservoir is obtained. (2) the water breakthrough mechanism model of gas well with edge water gas reservoir is established, and the performance of gas well with edge water gas well is simulated. The characteristics of water invasion of Changxing formation gas reservoir in Huanglong Chang Chang formation are clarified. The main characteristics of water invasion are as follows: well Huanglong 001-X1 and well Huanglong 004-X3, located at lower position in the south and north wing of the structure, have undergone obvious water invasion. The distribution law of residual gas in Changxing formation gas reservoir in Huanglong Chang Chang formation is clarified in the south water body, which is mainly distributed in the middle and high parts of the gas reservoir, and the remaining reserves are 36.63 脳 10 ~ (8) m ~ ((3)) ~ (5)) and the comprehensive development and adjustment countermeasures for optimizing gas distribution and drainage gas recovery are worked out. For the last 15 years, the predicted cumulative gas production capacity was 59.98 脳 10 ~ (10) m ~ (-1) / d, the recovery degree was 74.49%, the cumulative gas production rate was 1.92 脳 10 ~ (8) mm / d higher than the current production status, and the recovery degree was increased by 2.10%. After the edge of the water front was pushed to the production layer of Huanglong 001-X _ 1 well, no further progress was made. The harm to other production wells has been alleviated and the gas reservoir development effect has been improved to some extent.
【学位授予单位】：重庆科技学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE37

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