One-Trip Multistage Completion Technology for Unconventional Gas Formations

Abstract

Abstract Cost-effective development of unconventional gas resources depends upon strategic application of advancing technologies. By employing efficient fracturing techniques with an appropriate multi-stage fracturing completion, operators can achieve higher initial gas rates, increased recovery rates and reduced completion costs. The completion process employs a single-trip multi-stage completion system which is driving the cost-effective exploitation of difficult reservoirs. Discussion will center on planning and execution strategies followed by some case history results and lessons learned. The introduction of a new feature to improve operational efficiency and future system improvements will be addressed. The planning stage considers key factors associated with reserve estimates, selection of number of fractures, production behavior analysis, production forecast analysis, risk analysis, fracture design, and economic evaluation. The installation stage considers equipment and operational issues such as quantity and spacing of packers and sleeves. The completion stage involves techniques and procedures of the fracturing process. These planning and execution strategies achieve mechanical, volumetric and economic success, established by the efficiency of each fracture and total gas production rate when compared to initial evaluations. The one-trip multi-stage fracturing completion process reduces rig time and cost for hydraulic fracturing services, accelerates production and improves reservoir drainage. When coupled with effective fracturing strategies and best practice procedures, the system provides improved production from unconventional gas formations.