九龙山气田珍珠冲组气藏水侵特征及对策研究

发布时间：2018-05-28 21:39

本文选题：水侵 + 治水　；参考：《重庆科技学院》2015年硕士论文

【摘要】：九龙山气田位于四川盆地西北部苍溪县境内，其珍珠冲组气藏为典型的低孔、中低渗裂缝-孔隙型砂砾岩边水气藏。目前该类气藏的开发国内没有相关借鉴经验，针对气藏当前面临的严重出水问题，在综合前人研究成果和气藏已有动静态资料的基础上，运用气藏工程的最新理论和方法，以珍珠冲组气藏为研究对象，全面研究气藏的水侵特征和治水对策，研究对于指导九龙山气田珍珠冲组气藏的后期开发具有重要的意义。论文首先在分析气藏地质和开发特征的基础上，划分出水类型，研究砂岩体分布、裂缝分布与地层水分布的相关性，得到地层水的分布特征。然后通过储层物性和理论图版判断气井的水侵方式；根据气井见水的时间判断气藏的水侵方向；利用容积法、物质平衡等方法计算气藏的水体储量和水侵量；通过水驱替换系数和水驱曲线法判断水体的活跃度。其次利用气水两相流动方程和动态储量模型从产能和动态储量两个方面研究了出水对气藏开发的影响。最后，在气藏气水分布和水侵特征研究的基础上制定了治水方案。研究结果表明，珍珠冲组气藏可划分为长期产水、中期产水、不产水以及地层水上窜四种出水类型；地层水分布特征表现为以井控区为中心的周边，横向上不连续，呈局部富集状态，划分成井控区西翼、井控区东翼与南翼以及构造北翼三个水区；水侵方式主要以裂缝性水窜为主，水侵方向具有多方向性，水体能量有限，但水体活跃，现阶段排侵比严重偏低；水侵导致气井的无阻流量降低了18%~27%，动态储量降低了10%~23%；通过“整体治水、主动排水、分步实施”的治水方案，减缓了井控区的水侵，进一步削弱了水体能量。
[Abstract]:Jiulongshan gas field is located in Cangxi County northwest of Sichuan Basin. The gas reservoir of Zhuzhongchong formation is a typical low porosity gas reservoir with low permeability fracture and pore sand and conglomerate edge. At present, there is no relevant experience in the development of this kind of gas reservoir in China. In view of the serious water problem facing the gas reservoir at present, on the basis of synthesizing the previous research results and the existing static and dynamic data of the gas reservoir, the latest theories and methods of gas reservoir engineering are applied. Taking the gas reservoir of Zhuzhongchong formation as the research object, it is of great significance to study the characteristics of water invasion and water control measures of the gas reservoir in Jiulongshan gas field, which will guide the later development of the gas reservoir of Zhuzhou Chong formation in Jiulongshan gas field. Firstly, on the basis of analyzing the geological and development characteristics of gas reservoir, the paper divides the water type, studies the distribution of sandstone body, the correlation between fracture distribution and formation water distribution, and obtains the distribution characteristics of formation water. Then the water invasion mode of gas well is judged by reservoir physical property and theoretical chart, the direction of water invasion of gas reservoir is judged according to the time of water breakthrough of gas well, and the water reserves and water invasion amount of gas reservoir are calculated by volume method and material balance method. The water displacement coefficient and the water drive curve method are used to determine the activity of water body. Secondly, by using gas-water two-phase flow equation and dynamic reserve model, the effects of effluent on gas reservoir development are studied in terms of productivity and dynamic reserves. Finally, based on the study of gas-water distribution and water invasion characteristics in gas reservoirs, a water control scheme is established. The results show that the gas reservoir of Zhuzhongchong formation can be divided into four types: long-term water production, intermediate water production, non-water production and formation water channeling, and the distribution characteristics of formation water are as follows: the center of the well control area is the periphery, and the horizontal water distribution is not continuous. It is divided into the west wing of the well control area, the east wing and the south wing of the well control area and the three water areas of the structure north wing, the water invasion mode is mainly fractured water channeling, the direction of water invasion is multi-directional, the water body energy is limited, but the water body is active. At the present stage, the discharge ratio is on the low side; the unhindered flow rate of gas wells is reduced by 18% and 27% due to water invasion; the dynamic reserves are reduced by 10% and 23%; through the water control scheme of "overall water control, active drainage, step by step implementation", the water invasion in the well control area is slowed down. Further weaken the water energy.
【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】：TE377

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