莫索湾气田凝析气藏地质工程一体化研究

Research on Geological Engineering Integration of Condensate Gas Reservoir in Mosuowan Gas Field

以新疆油田莫索湾气田A井区带底水的凝析气藏为例,研究目前地层的剩余气分布情况,为指导后续开发提高单井采收率提出了地质工程一体化的研究方法。在有效认识储层层面构造、断层构造以及沉积相分布的基础上,进行了储层参数的测井解释计算,准确预测了孔渗饱等属性的三维模型;通过储层流体的实验数据,拟合符合地下情况的流体模型,得到了状态方程和闪蒸计算方法;应用完井参数资料和生产历史资料,拟合产气量和产油量,且拟合精度满足工程需求;最后模拟计算了储层剩余气分布,评价了剩余储量开发潜力,研究区剩余储量主要集中在构造高部位,东西两边也有明显的分布,为后续老井补层打孔,优化新井部署提供有力依据。从模拟结果上发现,该区东南部的断裂对地层流体的流动和分布存在很大影响,不是以前认为的封闭边界,而是纵向上沟通了多个层系。地质工程一体化方法有助于重新认识储层构造,且能够快速修正模型,为进一步优化开发效果,提高单井产能奠定基础。上述方法在凝析气藏高效开发中具有重要的应用价值。

Taking the condensate gas reservoir with bottom water in the A area of Mosuowan gas field in Xinjiang oilfield as an example,the purpose of this paper is to study the remaining gas distribution in the current formation and guide the follow-up development to improve the recovery factor,and also an integrated geological engineering research method is proposed.On the basis of effective understanding of reservoir-level structure,fault structure and sedimentary facies distribution,logging interpretation calculation of reservoir parameters was carried out,and a three-dimensional model of properties such as pore permeability saturation was accurately predicted.Through experimental data of reservoir fluids,it proposed the fluid model in line with the underground conditions,and the state equation and flash calculation method are obtained.The completion data parameters and production history data are used to fit the gas production and oil production,and the fitting accuracy meets the engineering needs.Finally,the remaining gas distribution in the reservoir was simulated,and the development potential of the remaining reserves was evaluated.The remaining reserves in the study area are mainly concentrated in the high structural parts,and there are also obvious distributions on both sides of the east and west sides.From the simulation results,it is found that the fault in the southeast of the area has a great influence on the flow and distribution of formation fluids.It is not a closed boundary previously thought,but multiple layers are communicated vertically.The integrated geological engineering method helps to re-understand the reservoir structure and quickly revise the model,which helps to further optimize the development effect and increase the productivity of a single well.The application of the above method is effective in the efficient development of condensate gas reservoirs and has important application value.