串珠状缝洞型储层油藏产能指示曲线解析  

Analysis of productivity indicator curves for bead-shaped fractured-vuggy oil reservoirs

作　　者：徐燕东 XU Yandong(Petroleum Engineering Technology Research Institute of Sinopec Northwest Oilfield Branch,Urumqi,Xinjiang 830011,China)

机构地区：[1]中石化西北油田分公司石油工程技术研究院,新疆乌鲁木齐830011

出　　处：《油气井测试》2023年第6期65-71,共7页Well Testing

基　　金：中石化重大科技攻关“特深层油气钻完井关键技术与装备”课题6“塔里木盆地特深层钻完井工程技术示范”(P21081-6)。

摘　　要：塔里木盆地缝洞型碳酸盐岩油藏储层结构复杂,即使产能测试期间井口压力高于饱和压力,产能指示曲线形态也存在多样性。从缝洞型储层复杂结构特征出发,假设洞穴型储层是管流、裂缝型储层是渗流,推导出串联型缝洞型储层产能方程表达式,进一步建立了产能方程与井周围缝洞储层分布的关系。经塔里木某缝洞型储层7口井的产能指示曲线实际应用,可以定性解析出井周储层结构特征,并与压恢试井反应的储层结构特征基本吻合;同时也可定量计算出近井洞穴的流动系数、裂缝系统流动系数的湍流系数。该方法是利用产能试井方法定性分析缝洞型储层结构特征和流动特征方法的有益探索。The structure of fractured-vuggy carbonate reservoirs in Tarim Basin is complex,and the shape of production capacity curve during the test period is diverse even if the wellhead pressure is higher than the saturation pressure.Starting from the complex structural characteristics of fractured-vuggy reservoirs,assuming that cavernous reservoirs are flowing through pipes and fractured reservoirs are seepage,a serial type production capacity equation expression for fractured-vuggy reservoirs was derived,and furthermore,the relationship between production capacity equation and distribution of fractured-vuggy reservoirs around the well was established.Through the application of production capacity indicator curves in seven wells of a fractured-vuggy reservoir in Tarim Basin,the structural features around the well can be qualitatively analyzed,which generally coincides with those reflected by pressure recovery well test;meanwhile,the flow coefficient of near-well caverns and turbulence coefficient of fracture system flow coefficient can also be quantitatively calculated.The results show that this method is a useful exploration for qualitative analysis of structural features and flow characteristics of fractured-vuggy reservoirs using production capacity test methods.

关 键 词：塔里木盆地 缝洞型油藏 产能试井 指示曲线 湍流系数 定性分析 储层结构 流动特征 

分 类 号：TE328[石油与天然气工程—油气田开发工程]