Economic Performance Assessments of Multi-Well Pad Drilling Technology in the Fuling Shale Gas Field
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摘要: “井工厂”平台的布井数量和作业模式会直接影响“井工厂”技术的经济性，而目前缺少“井工厂”技术经济性评价模型。为此，在分析“井工厂”作业对钻前、钻井以及压裂等工程成本影响的基础上，以工程总成本降低最大为目标函数，建立了“井工厂”技术经济性评价模型，并用涪陵页岩气田现场实际数据进行了计算分析。实例证明，计算结果与现场实际数据具有较好的一致性；分析发现，涪陵地区中浅层页岩气井“井工厂”平台最优布井数量为4~8口，在布井超过10口的深层页岩气平台，最佳作业模式为“30型钻机+70型钻机”的流水线双钻机“井工厂”作业模式。研究表明，提出的“井工厂”经济性评价分析方法，及计算得到的“井工厂”平台最优布井数量和作业模式，可为“井工厂”技术的整体部署和设计提供指导。Abstract: The number of wells deployed on a specific work mode of one multi-well pad may directly determine economic performance of multi-well pad drilling technology. Currently, there is no model available for assessment of the economic performance of the technology. In this paper, the impact of the "multi-well pad drilling" operations on engineering costs related to pre-drill, drilling, fracturing and other operations were analyzed. In addition, models to assess economic performances of the drilling technology were established with the reduction in overall cost of project as the objective function. Calculations and analyses were also performed by using field data of the shale gas field in the Fuling Area. Research results showed the calculation results coincided well with field data. It was determined that the optimal quantity of wells deployed on each "multi-well pad drilling" platform in Fuling Area was 4-8 wells. For platforms deployed for development of shale gas in deep formations with over 10 wells, the stream-lined "multi-well pad drilling" platform with two rigs of "Model 30+Model 70" should be considered as the optimal work mode. Research results showed the newly proposed techniques for assessing and analyzing economic performances of the "multi-well pad drilling", together with resulting optimal number of wells deployed on such platform and corresponding work modes might provide the necessary guidelines for the overall deployment and design of multi-well pad drilling technology.
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Keywords:
- shale gas /
- multi-well pad /
- quantity of wells deployed /
- work mode /
- economic performance /
- Fuling Shale Gas Field
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