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廖家场区块位于洛带气田的北东部,主力气藏为遂宁组气藏,具有孔隙度低、渗透率低、非均质性强等特点,在开采过程中表现出了单井产量不均衡,气井产量和井口压力快速递减(90.7%的气井井口油压已经低于2.5MPa,77.8%的气井产量小于0.5×104m3/d),单井动态控制半径小(平均为203m),单井控制储量低(平均为0.15×108m3),地层压力不均衡下降,储量动用程度低等动态特征。为提高气井的贡献率,尽可能实现稳产,对现有生产井生产情况进行分析后,建议尽快在廖家场区块内改造一条低压输气管线或开展增压开采工作,解决管网压力波动对气井产量的影响。通过气藏潜力分析,建议在井间距较大的井区部署加密调整井,提高井间的储量动用程度;在地层能量相对较高的气藏东部区域部署扩边井,进一步探索气藏的分布范围,动用存在于气藏边部的部分低效储量。
The Liaojiachang block is located in the north east of the Luodai Gas Field. The main gas reservoir is the Suining Formation gas reservoir. It has the characteristics of low porosity, low permeability and strong heterogeneity. During the mining process, the single well output is not (90.7% of the wellhead hydraulic pressure has been lower than 2.5MPa, 77.8% of the gas well production is less than 0.5 × 104m3 / d), single well dynamic control radius is small (average 203m), single well The control reserves are low (averaging 0.15 × 108m3), formation pressures are not balanced, and reserves are used to a lesser extent. In order to increase the contribution rate of gas wells and achieve steady production as much as possible, after analyzing the production conditions of existing production wells, it is suggested that a low-pressure gas transmission pipeline be constructed or supercharged mining be carried out in Liaojiachang block as soon as possible so as to solve the pressure fluctuation in pipe network Impact on gas well production. Based on the analysis of potential of gas reservoirs, it is suggested to deploy an encrypted adjustment well in the well area with a large well spacing to improve the utilization of reserves between wells. To extend the well in the eastern area of the gas reservoir with relatively high stratigraphic energy to further explore the distribution of gas reservoirs Range, the use of some of the inefficient reserves that exist in the margins of the gas reservoir.