脉动水驱孔隙压力传输规律数学模型  

Mathematical model of pore pressure transmission law in pulsating water flooding

作　　者：吴飞鹏[1] 李娜[1] 孙德旭[2] 汪庐山[2] 刘静[1] 张宗檩[2] 蒋文超 李德 WU Feipeng;LI Na;SUN Dexu;WANG Lushan;LIU Jing;ZHANG Zonglin;JIANG Wenchao;LI De(School of Petroleum Engineering in China University of Petroleum(East China),Qingdao 266580,China;SINOPEC Shengli Oilfield Company,Dongying 257000,China)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中石化胜利油田分公司,山东东营257000

出　　处：《中国石油大学学报（自然科学版）》2022年第4期94-101,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(51874339、51904320);国家重点研发计划项目(2020YFA0711800)。

摘　　要：基于孔隙压力波波动力学理论,建立正弦波、锯齿波、三角波及梯形波4种变排量脉动波条件下储层内波动渗流模型,研究压力波传输的主控因素及其影响规律。结果表明:正弦波和梯形波在压力保持方面有较好作用;频率越低,脉动效果越好,频率为0.01~1 Hz效果较好(不同储层略有差异);渗透率越低,注入流体黏度越大,脉动压力波衰减越快;低频率、高振幅的脉动注水可有效延缓压力波衰减速度,扩大脉动水驱有效作用范围;采用稳定注入化学剂和脉动注水交互进行,一定程度上能减缓压力衰减速度,促进化学剂混合,提高最终采收率。Based on the theory of pore pressure wave dynamics,a fluctuating seepage model in the reservoir under the condition of sine wave,sawtooth wave,triangular wave and trapezoidal wave with variable displacement was established.And the main controlling factors of pressure wave transmission and the influence laws were studied.The results show that sine wave and trapezoidal wave have better effects on pressure retention.The lower the frequency,the better the pulsation effect.The frequency of 0.01-1 Hz present a better effect(slightly different in different reservoirs).The lower the permeability,the better the injection effect.The higher the fluid viscosity,the faster the pressure pulsation wave attenuation.The low-frequency,high-amplitude pulsating water injection can effectively delay the pressure wave attenuation speed and expand the effective range of pulsating water flooding.The stable injection of chemical agents and pulsating water injection are interactively carried out.It can slow down the decay rate to a certain extent,promote the mixing of chemical agents,and improve the ultimate recovery factor.

关 键 词：压力波 衰减 脉动注水 数学模型 

分 类 号：TE357.9[石油与天然气工程—油气田开发工程]