页岩气藏中两条互相垂直裂缝井产能分析  

Productivity analysis for wells in shale gas reservoir with orthogonal fractures

作　　者：王坤[1] 张烈辉[1] 陈飞飞[2] 

机构地区：[1]油气藏地质及开发工程国家重点实验室西南石油大学,四川成都610500 [2]中石化中原油田分公司,河南濮阳457001

出　　处：《特种油气藏》2012年第4期130-133,157,共4页Special Oil & Gas Reservoirs

基　　金：国家"973"计划课题"碳酸盐岩缝洞型油藏注水开发研究"(2011CB201005);教育部博士点专项基金"三维大变化尺度缝洞型碳酸盐岩油藏复杂油水两相流动规律研究"(20105121110006);西南石油大学研究生创新基金项目"页岩气稳态产能研究"(GIFSS0703)

摘　　要：针对页岩气藏中两条互相垂直裂缝井,运用2次保角变换,建立了考虑裂缝的有限导流和滑脱效应影响的页岩气藏裂缝井稳态产能数学模型。分析不同支撑剂粒径和裂缝穿透比条件下裂缝导流能力对产能动态曲线的影响,绘制了不同滑脱系数下的产能流入动态曲线,同时研究了不同滑脱系数下裂缝穿透比对产能的影响。A mathematical model of steady productivity is established for wells in shale gas reservoir with orthogonal fractures through twice conformal transformations by taking account of slippage effect and finite conductivity. The impact of fracture flow capacity on productivity curve under conditions of different proppant grain sizes and fracture penetration ratios is analyzed,the inflow performance curves are drawn under different slippage factors,and the effect of fracture penetration ratio on productivity is studied under different slippage factors. The results show that gas well productivity increases with fracture flow capacity(below 2 000) ,increases linearly with fracture penetration ratio,and increases with slippage factor especially at low flowing pressure stage.

关 键 词：页岩气藏 垂直压裂井 有限导流 滑脱效应 保角变换 产能 

分 类 号：TE344[石油与天然气工程—油气田开发工程]