低阻环带的形成、识别与分析  

Formation,Recognition and Analysis of Low-resistivity Annulus

作　　者：廖东良[1,2] 

机构地区：[1]"油气资源与探测"国家重点实验室.中国石油大学(北京),北京昌平102249 [2]中国石化石油工程技术研究院,北京朝阳100101

出　　处：《西南石油大学学报（自然科学版）》2014年第1期39-44,共6页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：低阻环带是可动用油气显示的有力证据,也是判断油气层,尤其是低电阻率油气层的有效手段。从油水两相渗流方程出发,推导出了油、水相在泥浆侵入过程中的渗流推进速度,分析了低阻环带的形成过程。高频感应仪器能同时测量5条电阻率曲线,从曲线之间的关系能看出低阻环带有3种表现形式,分别是R07最低、R10最低、R14最低,通过这3种形式可以分析低阻环带的形成过程和储层特性。分别给出了低阻环带3种形式的实例及高频感应处理结果,结果显示,根据高频感应测井能直观探测出低阻环带的特性,可快速地判断储层为油层、水层和油水同层。The low-resistivity annulus is the strong evidence of available oil and gas, and the effective means of judgement of oil and gas layer, especially the low resistivity oil and gas layer. Based on the flow equations ofoil and water two phases, the seepage driving velocity is derived during mud filtrate invaded formation, and the process of forming low-resistivity annulus was analyzed. The high frequency induction log can get five resistivity curves at one time. From the reaction of the curves, we can see there are three manifestations for low-resistivity annulus and they are Ro7 the lowest, Rio the lowest, Rll the lowest, respectively. The paper analyzed the formation process of low-resistivity annulus and reservoir characteristics through the three manifestations. Some examples of the three manifestations of low-resistivity annulus and the process result from high frequency induction log were presented, the results shows that we can quickly tell the reservoir is oil layer, water layer or oil-water layer.

关 键 词：低阻环带 相渗透率 渗流方程 高频感应 侵入深度 

分 类 号：TE132[石油与天然气工程—油气勘探]