涪陵页岩气田“井工厂”技术

涪陵页岩气田是我国第一个投入商业化开发的国家级页岩气示范区,经过3年的技术攻关和现场试验及应用,形成了一套适合复杂山地页岩气特点的"井工厂"技术,极大地缩短了开发周期,降低了工程成本。涪陵页岩气田"井工厂"关键技术主要包括山地"井工厂"布局优化设计、页岩气"井工厂"钻井作业模式、"井工厂"压裂作业模式以及撬装化建站等4个方面。现场试验与推广应用情况表明,采用单钻机2~4井和双钻机5~8井"井工厂"钻井模式,单机组拉链式"井工厂"压裂与双机组同步"井工厂"压裂模式,可以达到当年完成建平台、钻井、压裂、试气、投产的开发要求。"井工厂"技术为涪陵页岩气田50×108 m3/a一期产能建设的顺利完成提供了强有力的技术支撑,并成为页岩气田经济开发的核心技术,对我国页岩气规模化开发具有重要的借鉴和引领作用。 

Multi-Well Pad Technology in the Fuling Shale Gas Field

The Fuling Shale Gas Field is the first commercial development of shale gas in China and thus is now a national demonstration area. After three years of research and development, the Gas Field had developed "multi-well pad" technologies to cope with requirements presented by shale gas developed in complex mountain areas. These technologies could significantly reduce the time and costs required for the development of shale gas. This paper reviews key "multi-well pad" technologies developed in the Fuling Shale Gas Field from four aspects:first, optimized deployment and design of well patterns, second, drilling operations in the "multi-well pad" system for shale gas development, third, fracturing operations in the "multi-well pad" system for shale gas development and fourth, construction or skid-mounted stations. Field tests and application performances showed that the combination of "multi-well pad" drilling operations involving a single rig for 2-4 wells or two rigs for 5-8 wells with zipper fracturing with one fracturing unit or synchronous fracturing with two fracturing units could fully satisfy development demands related to accomplish of platform construction, drilling, fracturing, well testing and commercial production within the same year. In addition to providing construction of 50×108 m3 productivity in Phase 1 development of the Fuling Shale Gas Field with reliable technical supports, the "multi-well pad" system has become the core technology for economic development of shale gas fields. In fact, these technologies might provide necessary guidance for large-scale development of shale gas in China.