摘要
油层聚合物水淹后,油层的物理性质发生了改变,导致电性特征变化,过去水驱水淹层测井解释方法已经不再完全适合聚合物水淹层。针对胜利油区聚合物配注2种类型(清水配制母液清水注入和清水配制母液污水注入)的水淹层,系统地研究了聚合物溶液的导电性,表明聚合物溶液具有弱导电性;研究不同配注方式下聚合物水淹层的测井曲线电性特征,从测井曲线特征变化来判定油层的聚合物水淹状况;实验证明了阿尔奇公式仍然适合聚合物水淹层,为聚合物水淹层的测井解释提供基础;针对聚合物水淹层的特点,提出了适合聚合物水淹层测井解释方法并求取了不同聚合物浓度下岩电参数。对注聚期间新井二次解释,解释精度大大提高。
After polymer water flooding of oil reservoir, physical property of the reservoir has been changed to lead to electricity characteristic changes. The past log interpretation methods for water-out zones are already not suitable for the polymer water-out layers. According to two kinds of polymer injection allocation water-out zones in Shengli oilfield, systematically studied is the electric conductivity of the polymer solution, the result of which shows that the polymer solution has weak electric conductivity. And also studied are the logging curves electricity characteristic （e. g. , microelectrode, spontaneous potential, 4 m gradient and induction logs） of polymer water-out zones under different injection allocation modes, and from the log curves characteristic changes we can judge the polymer water flooded event. The experiments prove that Archie formula is still suitable for the polymer water-out zones, and is still the foundation for log interpretation of such zones. According to the characteristic of polymer water-out zones, proposed are the log interpretation methods for polymer water-out zones, and calculated are the electric parameters of rocks with different densities. The re-explanation results for new wells in polymer injection period show that the interpretation precision improves greatly.
出处
《测井技术》
CAS
CSCD
2008年第4期291-295,共5页
Well Logging Technology
关键词
测井解释
聚合物
水淹层
测井响应
特征
log interpretation, polymer, water-flooded layer, log response, feature
