基于复合相渗的特低渗透油藏递减率新模型  

A New Model of Decline Rate for Ultra-Low Permeability Reservoirs Based on Composite Relative Permeability Curves

作　　者：项俊辉 殷代印[1] 王东琪[1] XIANG Jun-hui;YIN Dai-yin;WANG Dong-qi(School of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China)

机构地区：[1]东北石油大学石油工程学院

出　　处：《数学的实践与认识》2018年第9期138-143,共6页Mathematics in Practice and Theory

基　　金：国家自然科学基金:低渗透油藏表面活性剂驱微乳液渗流机理及数值模拟研究(51474071)

摘　　要：特低渗透油藏储层物性差，为提高低效井产能常配合压裂等措施，造成产量大幅度波动，预测递减率难度大．为此，以朝阳沟油田朝55区块为例，重点考虑特低渗透油藏自然递减规律和措施工作量的影响，对产量递减多因素分析理论模型进行简化，建立了基于复合相渗的特低渗透油藏递减率新模型．研究结果表明，基于复合相渗的产量递减率模型法产油量平均误差为2．97％，与Arps相比，误差降低1．91百分点，考虑了措施工作量影响后，预测产量能够反映波动状况，预测精度更高，有利于指导油田开发规划．The property of ultra-low permeability reservoirs is poor. Fracturing measures are often used to improve the productivity of inefficient wells, resulting in large fluctuations in production, and predicting the decline rate is very difficult. Therefore, this article takes chao55 block of Chaoyanggou Oilfield as an example, the law of natural decline and the workload of the ultra-low permeability reservoirs are considered, the theoretical model of multifactor analysis of production decline is simplified, and then a new model of decline rate of ultra-low permeability reservoir based on composite phase percolation is established. The results show that oil production average error of new method is 2.97%, compared with the Arps, the error is reduced by 1.91 percentage points. Considering the influence of the work- load, the prediction yield can reflect the fluctuation situation, and the prediction accuracy is higher, which is beneficial to guide the oil field development planning.

关 键 词：特低渗透油藏 复合相渗 递减率 模型 产油量 

分 类 号：TE348[石油与天然气工程—油气田开发工程]