摘要
Abstract
This study focuses on the Longwangmiao Formation of the Moxi Block in the Anyue Gas Field,Sichuan Basin—a large carbonate gas reservoir with active edge water.Addressing the challenges of large-scale,low-amplitude,and strongly heterogeneous edge-water gas reservoirs—characterized by wide gas-water transition zones,complex water invasion patterns,and the high computational cost of conventional numerical simulation that limits precise water control—this work systematically investigates reservoir dynamic diagnosis,history matching,and production optimization based on streamline.A gas-phase streamline tracing method was developed to quantitatively and intuitively characterize subsurface gas-water migration paths and dynamic well control areas.Furthermore,a hierarchical multiscale automatic history-matching workflow was proposed,which sequentially calibrates the layer-level,regional,and grid parameters.This approach significantly improves the history-matching accuracy of bottom-hole pressure and cumulative water production,effectively capturing reservoir heterogeneity and water-in-vasion channels.On this basis,a streamline-based rate allocation optimization algorithm was further developed.By dynamically calculating the movable water-gas ratio for each well and reservoir field,the algorithm enables real-time adjustment of produc-tion rates among wells under a constant total gas production rate constraint.This strategy effectively controls water production and substantially enhances gas recovery.Field optimization results show that after 4.5 years of production control,gas recovery increased by 9.06%,cumulative water production decreased by 64.06%,and the remaining gas distribution was significantly improved.Compared with conventional numerical simulation,the proposed intelligent streamline technique enables intuitive and quantitative characterization of subsurface fluid flow,achieves auto-history matching and intelligent production forecasting,greatly reduces manual workload,minimizes subjective errors from human intervention,and provides a novel technical approach for precise gas reservoir management and control.关键词
四川盆地/气相流线追踪/自动历史拟合/启发式配产优化/流体运移方式/水侵模式/剩余气分布Key words
Sichuan Basin/gas streamline tracing/auto history matching/auto optimization/fluid flowing pattern/water invasion pattern/residual gas distribution分类
能源科技
