Study on the Economic and Effective Development Limits of Longfengshan Volcanic Reservoir
Longfengshan volcanic reservoir has complex geologic conditions,and is characterized by multiple eruptive periods,small organization scale,rapid changes in lithofacies and variable fluid properties.Different blocks have different physical properties and reservoir types,resulting in large differences in the calculation parameters used in economic evaluation.With the help of cash flow method,different economic evaluation models were established for different gas reservoir types.The sensitivity of each factor was evaluated.Based on the production characteristics,the chart boards of economic and effective development limits for different blocks and different horizontal well lengths were established.The basic material conditions for economic and effective development ware analyzed.Furthermore,the optimization of economic and effective development blocks was carried out.The results show that reservoir depth is the most important factor affecting the economic benefit.The middle depth in Block North 213 is 3,400 meters,in which the limit of initial production and controlled reserves for economic and effective development is 34,000 cubic meters per day,and from 160 million cubic meters,respectively.Under the current economic and technical conditions,when the length of horizontal wells is 800 to 1,600 meters,the west of Block North 5 in stage 1,the northeast of Block North 213 and Block North 217 in stage 3,the southeast of Block North 213 in stage 4 and the northwest of Block North 218 in stage 4 are recommended as the target block for deployment of horizontal wells.
万方数据
维普
