考虑浓度稀释的聚驱试井模型及解释方法  

Well test model and interpretation method by concentration dilution in polymer flooding

作　　者：佟斯琴[1] 徐哲[2] 陈景霞[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]大庆油田有限责任公司第七采油厂,黑龙江大庆163517

出　　处：《大庆石油地质与开发》2004年第1期56-58,63,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：针对聚驱过程中存在稀释带的情况,提出用n>1的幂律模式描述稀释带流体混合液粘度,在此基础上,建立了考虑浓度稀释的聚驱试井模型。用有限差分方法数值求解,绘制理论曲线,结合室内实验、理论研究及数值模型提出了解释方法,可解释出幂律指数、井筒储存系数、表皮系数、平均流度,推算聚合物溶液稀释区前沿半径等,丰富了解释参数,提高了解释精度。通过实测资料的解释,图版拟合效果好,结果符合实际。该研究成果进一步完善了聚驱试井理论模型及解释方法,为充分发挥聚驱试井的动态监测作用奠定了理论基础。According to the situation of the dilute zone existing in polymer flooding , it is proposed that the mixed viscosity of fluid in dilute zone is described by using the power law 'n>1'. Furthermore, this paper establishes the well test model which is resolved by numerical method of finite difference and theoretical curves are drawed.Combined with laboratory experiment, theoretical study and numerical simulation, the interpretation method is proposed. It can interpret the power law exponent 'n', the coefficent of wellbore storage and skin, the average mobility and reckon the edge radius of the dilute zone of polymer solution,etc. The interpretation accuracy is improved and the interpretation parameters are plentiful. The matching results are good through interpreting the actual examples.The research result improves the well test model and interpretation method and establishes the basis of dynamic monitoring of polymer flooding well test.

关 键 词：试井 聚驱 稀释带 解释方法 

分 类 号：TE312[石油与天然气工程—油气田开发工程]