Fayetteville页岩气开发实践与启示  

The development of Fayetteville shale play and its implications

作　　者：万玉金[1] 李熙喆[1] 卢斌[1] 苏云河[1] 何畅 孙玉平[1] Wan Yu-jin;Li Xi-zhe;Lu Bin;Su Yun-he;He Chang;Sun Yu-ping(Research Institute of Petroleum Exploration and Development Beijing 100083,China)

机构地区：[1]中国石油勘探开发研究院

出　　处：《天然气地球科学》2019年第11期1655-1666,共12页Natural Gas Geoscience

基　　金：“十三五”国家科技重大专项“页岩气气藏工程及采气工艺技术”之课题6“页岩气开发规模预测和开发模式”(编号：2016ZX05037-006)资助

摘　　要：美国"页岩气革命"取得的巨大成功对世界能源结构产生重大影响,并引起了全球广泛关注。然而,虽然已有大量学者从技术、经济、政策和管理等方面分析了美国页岩气的成功经验,但少有对单个页岩气田的开发实践进行详细解剖。通过对北美第二个商业开发页岩气产区--Fayetteville气田开发实践深入分析,总结得出六点启示:①转变开发方式、持续改进工艺技术,不断完善学习曲线,努力实现降本增效;②以富含有机质页岩品质为主线,深化页岩气甜点区认识,有效降低开发风险;③页岩储层非均质特征明显,通过开辟试验区、滚动开发的方式提高高产井比例;④受租地边界调整水平井部署方位后,长期生产特征表明开发效果未受影响;⑤水平段长度逐年增加,平均单井产量同比提高,长水平井总体开发效益较好;⑥气井单井产量低、初期递减快,需持续、大量钻井才能保持气田上产与稳产。研究成果对我国页岩气的勘探与开发具有重要的指导和借鉴意义,有利于推动我国页岩气工业快速发展。The great success of"shale gas revolution"in U.S. has had a significant impact on the world’s energy structure and attracted worldwide attention. Although a large number of scholars have analyzed the successful experience of U.S. shale gas from technology,economy,policy and management,few have detailed dissected the development practice of individual shale gas play. Through an in-depth analysis of the development practices of the Fayetteville shale gas play,the second commercial shale gas play in North America,six inspirations can be obtained.(1)Continuous improvement of the technology and the learning curve attribute to the reduction of cost and increase of the shale gas production.(2)Fully understanding of the complexity of shale gas play and identification of the sweet spot precisely would benefit to the reduction of the uncertainty and risk of unconventional gas development.(3)Shale gas reservoirs show some heterogeneity,therefore the pilot test and extend development step by step are usually used to improve the proportion of high-yield wells.(4)The long-term performance in Fayetteville shale wells were not altered after changing the horizontal well orientation from NW-SE to NS since the lease lines are oriented NS.(5)The lateral length grew longer and longer,while the technological progress has led to a sustained decline in cost and the overall benefits of long horizontal wells improved year by year.(6)A large amount of wells have to be brought into production to maintain a constant annual production level due to the lower gas rate of shale gas wells and its sharp initial decline. The research results have important guidance and reference significance for the exploration and development of shale gas in China,which is conducive to the rapid development of China’s shale gas industry.

关 键 词：页岩气 非均质 学习曲线 甜点区 水平段长度 Fayetteville 

分 类 号：TE34[石油与天然气工程—油气田开发工程]