多层疏松砂岩气藏出水机理及治水策略研究

发布时间：2018-06-23 09:01

本文选题：出水气藏 + 疏松砂岩　；参考：《西南石油大学》2015年硕士论文

【摘要】：对于出水气藏而言,气井出水是危害气田正常开发最主要的因素,在天然气开发的过程中,人们对于普通出水气藏已有较长的研究历史,关于气藏的出水机理与治水对策都有一套较为成熟的理论。然而,对于多层疏松砂岩气藏而言,首先,由于在国内外该类型气田并不多见且研究起步晚,人们对于该类型气田的认识水平和认识程度还存在一定的差异,尚未形成统一的认知和结论；其次,由于气藏存在埋藏浅,储层岩石疏松,小层众多,气水分布复杂等特殊地质特点,在气藏的出水治理过程中,直接移用常规气藏的治水方法效果并不理想,气田治水存在诸多困难。因此,有必要针对多层疏松砂岩气藏出水问题展开全面的研究,结合前人基础,系统的分析气藏出水机理,找到有效的治水措施。论文在总结前人研究的基础上,主要从事了以下研究内容： (1)根据有水气藏水侵研究的方法及技术思路特点,从地质上解释了多层疏松砂岩气藏水源多样形成机理,水源产出机理、总结出了一套水源识别的综合方法。 (2)结合气藏水侵分析知识体系与国内外的开发经验,从理论上找到了合理的气藏水体、水侵的评价方法,以及气藏出水的数值模拟技术。 (3)通过对比出水气藏的治理方案,结合前期水源及水侵分析的理论研究成果,总结出一套气藏分类治水方法制定原则,从地质上指导气井的治水。 (4)通过对实际气田层组(涩北一号气田II-4层组)的研究,理论结合实际,为论文的研究成果提供实例支持。论文研究认为,由于多层疏松砂岩气藏内部大量可动水以及外部边底水的存在,使得气藏同时存在层间水窜的“内忧”与边水水侵的“外患”,对于这种复杂情况,应根据现有气水分布和水侵趋势,结合储量动用规律,基于储层物性和地层能量状态,按照气水运动的自然规律,有步骤地动用各级储量,实现气藏的整体高速及平稳开发。
[Abstract]:As far as the gas reservoir is concerned, the gas well effluent is the most important factor that endangers the normal development of the gas field. In the process of natural gas development, people have a long history of research on the common outlet gas reservoir. There is a mature theory about the mechanism of gas reservoir effluent and water control. However, for multi-layer unconsolidated sandstone gas reservoirs, first of all, because this type of gas field is rare at home and abroad and the research started late, there are still some differences in the level and degree of understanding of this type of gas field. There is no unified cognition and conclusion. Secondly, due to the special geological characteristics of shallow burial, loose rock, numerous layers and complex gas-water distribution in the gas reservoir, in the process of water treatment of the gas reservoir, The effect of direct transfer of conventional gas reservoir is not satisfactory, and there are many difficulties in water control of gas field. Therefore, it is necessary to carry out a comprehensive study on the water outlet problem of multi-layer loose sandstone gas reservoir, combining with the previous basis, systematically analyze the mechanism of gas reservoir effluent, and find out effective water control measures. On the basis of summarizing the previous studies, this paper mainly focuses on the following research contents: (1) according to the characteristics of water invasion research methods and technical ideas of water-bearing gas reservoirs, this paper explains the formation mechanism of water source diversity in multi-layer loose sandstone gas reservoirs from the geological point of view. The mechanism of water source production is summarized and a comprehensive method of water source identification is summarized. (2) combining with the knowledge system of water invasion analysis of gas reservoir and the development experience at home and abroad, a reasonable evaluation method of water body and water invasion of gas reservoir is found theoretically. And numerical simulation technology of gas reservoir effluent. (3) through contrasting the treatment scheme of outlet gas reservoir, combining with the theoretical research results of water source and water invasion analysis in the early stage, a set of principles of classified water treatment method for gas reservoir are summarized. (4) through the research of the actual gas field formation (Shibei No. 1 gas field II-4 formation), combining theory with practice, this paper provides an example to support the research results of this paper. In this paper, it is considered that due to the existence of a large amount of movable water inside the porous sandstone gas reservoir and the existence of the external edge and bottom water, the gas reservoir simultaneously has the "internal worry" of interlayer water channeling and the "external danger" of the edge water invasion. For this kind of complex situation, According to the existing distribution of gas and water and the trend of water invasion, combined with the law of reserve production, based on the physical property of reservoir and the state of formation energy, and according to the natural law of gas-water movement, the reserves of all levels should be produced step by step, so as to realize the whole high speed and steady development of 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】：TE358.3

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