高含水油层产出剖面模型和测量方法的新认识  

NEW KNOWLEDGE ABOUT PRODUCTION PROFILE MODEL OF HIGH WATER CUT OIL RESERVOIR AND MEASURING METHOD

作　　者：王忠义[1] 涂文荣[1] 陈国华[1] 

机构地区：[1]大庆石油管理局测井公司,黑龙江大庆163412

出　　处：《大庆石油地质与开发》2001年第5期38-39,41,共3页Petroleum Geology & Oilfield Development in Daqing

摘　　要：高含水后期产层中剩余油的饱和度应当是一种随机概率分布 ,井中流体运移完全符合随机过程模型 ,用概率论和随机过程理论对其模型进行描述和分析得出一些全新的结论。由于剩余油的饱和度参数的离散随机性 ,即P (yi=c) =1的情况根本不存在。通过实验观测和严密的数学理论论证对高含水油层中求含水率的传统方法和测量结果提出了质疑。对于随机变量的求平均应当按 Y =1 n ni=1yi,根据“大样本定律” ,n的取值应当尽可能的大 ;井中流体含水率是随机变量 ,它的数学期望才是产层的出水率 。The residual oil saturation in oil payzone at late period of high water cut stage should distribute randomly, and the migration of flowing fluid in wells completely accords with the random process model. Some totally new conclusions can be got after the description and analysis to the model based on probability theory and random process theory. Due to the discrete randomness of the residual oil saturation parameter the situation of P(y i=c) =1 cannot exit. Based on experimental observation and strict mathematical theory demonstration this paper doubts the conventional method to extract water cut of high water cut oil reservoir and the measuring results. The expression should be used to extract the mean value of random variables, and according to 'big sample principle' the value of n should be taken as big as possible; The water cut of flowing fluids in wells is randomly constant and its mathematical expectation is the water cut of oil payzone. Therefore, the method of fixed time continuous accumulation to extract the mean value is applied.

关 键 词：产出剖面 含水率 概率分布 随机过程 数学期望 大样本定律 高含水油层 剩余油 

分 类 号：TE353.3[石油与天然气工程—油气田开发工程]