普光地区千佛崖组致密砂岩-页岩气藏开发技术对策  

Development technical countermeasures of tight sandstone and shale gas reservoirs in Qianfoya Formation of Puguang area

作　　者：付德奎[1] FU Dekui(Exploration and Development Research Institution,Zhongyuan Oilfield Company,SINOPEC,Puyang 457001,China)

机构地区：[1]中国石化中原油田分公司勘探开发研究院,河南濮阳457001

出　　处：《断块油气田》2024年第1期11-17,共7页Fault-Block Oil & Gas Field

摘　　要：普光地区侏罗系千佛崖组致密砂岩-页岩气藏为纵向叠合气藏,储层非均质性强,纵横向上储层特征和储集性能差异大,气藏开发潜力不明确,尚未形成开发井型、井网、井距等配套开发技术对策;且砂岩气藏与页岩气藏压力系统、气体运动方式不同,利用常规水平井压裂方式合层开采必定导致层间干扰和多余能耗,亟需采用最优开发方式。为此,文中参考鄂尔多斯盆地致密砂岩气藏水平井井位优选标准和四川盆地页岩气开发井型,根据储层展布特征,结合水平井与直井产能对比分析,优选水平井作为致密砂岩-页岩气藏的开发井型;采用类比法、经济评价法、单井产能法等,确定水平井水平段长度和合理井距;根据气藏特征,并借鉴同类气藏开发经验评价单井生产指标;在此基础上开展井位部署,评价气藏开发潜力。结果表明,采用2套井网分别开发千佛崖组致密砂岩气藏和页岩气藏,可建成年产能6.5×108 m3,这为普光地区千佛崖组致密砂岩-页岩气藏合理开发提供了有力支撑。The Jurassic Qianfoya Formation tight sandstone and shale gas reservoirs are vertically stacked gas reservoirs,with strong reservoir heterogeneity and large differences in reservoir characteristics and reservoir performance both vertically and horizontally,and reservoir development potential is not clear.Development well type,well pattern,well spacing and other supporting development technical countermeasures have not yet been formed.Since sandstone and shale gas reservoirs have different pressure system and gas movement mode,the commingled production using conventional horizontal well fracturing method must lead to inter-layer interference and excess energy consumption,which requires adopting optimal deveolpment methods.Therefore,referring to the well location selection criteria for horizontal wells in tight sandstone gas reservoirs in Ordos Basin and shale gas development well types in Sichuan Basin,based on reservoir distribution characteristics,and combined horizontal and straight well capacity comparative analysis,horizontal wells are preferred as development wells for tight sandstone and shale gas reservoirs.By adopting analogical method,economic evaluation method and single-well production capacity method,the horizontal section length and reasonable well spacing of the horizontal well are determined;single well production indicators are evaluated based on the characteristics of gas reservoirs and by learning the development experience of similar gas reservoirs.On this basis,well locations were deployed and the development potential of gas reservoirs was evaluated.The results show that two well patterns are used to develop tight gas and shale gas respectively in Qianfoya Formation,with a production scale of 650 million m3/year.The research results of this paper provide strong support for the rational development of Jurassic Qianfoya Formation tight sandstone gas reservoirs and shale gas reservoirs.

关 键 词：致密砂岩-页岩气藏 混合沉积 合理开发 开发对策 千佛崖组 普光地区 

分 类 号：TE32[石油与天然气工程—油气田开发工程]