摘要
充分考虑低对比度储层多相流体的模糊性特征,应用模糊理论和测井解释原理,开展鄂尔多斯XX区块砂砾岩油藏流体性质判别研究。研究认为,储层品质因子、侵入因子、视地层水电阻率、含水饱和度、可动油饱和度可作为研究区流体模糊识别的样本空间。根据这5项储层参数在多样本条件下符合正态分布的概念,构建了多相流体的模糊分布函数,通过定义的隶属函数和最大隶属度原则对储层参数赋予权值,并进行逐级选取或淘汰,最后建立了基于多级模糊识别的鄂尔多斯XX区块低对比度储层多相流体的判别模型。模型应用结果显示,研究区已试油的33层识别准确率达91%,效果较好。
Considering the fuzziness characteristics of multiphase fluid in low contrast reservoir,the fluid properties of glutenite reservoir in XX block of Ordos Basin are studied by using fuzzy theory and logging interpretation principle.Five basic reservoir parameters,including reservoir quality factor,invasion factor,apparent formation water resistivity,water saturation and movable oil saturation,are used as the sample space for fuzzy identification of fluid in the study area.According to the concept of normal distribution of these five reservoir parameters under the condition of multiple samples,the fuzzy distribution function of multiphase fluid is constructed;the weight of reservoir parameters is given by the defined membership function and the principle of maximum membership degree,and is selected or eliminated step by step.Finally,the discrimination model of multiphase fluid in low contrast reservoir in XX block of Ordos is established based on multi-level fuzzy recognition.The application of the model shows that the recognition accuracy of 33 layers in the study area is 91%and the effect is good.
作者
贺斌
冯欣欣
刘再振
赵燕红
He Bin;Feng Xinxin;Liu Zaizhen;Zhao Yanhong(EnerTech-Drilling&Production Co.,CNOOC,Tianjin 300000,China;Shanxi Tiancheng Petroleum Technology Co.,Ltd.,Xi′an Shanxi 710000,China;Research Institute of Exploration and Development,PetroChina Yumen Oilfield Company,Jiuquan Gansu 735000,China)
出处
《工程地球物理学报》
2020年第6期683-688,共6页
Chinese Journal of Engineering Geophysics
基金
中国海洋石油总公司专项项目(编号:CNOOC-KJ 135KJXM NFGJ2016-05)。
关键词
多级模糊识别
隶属函数
隶属度
低对比度
流体识别
multilevel fuzzy recognition
membership function
grade of membership
low contrast
fluid recognition
