致密油藏强毛管力约束条件下多相渗流规律  

An analytical model for multiphase flow in tight oil reservoirs under strong capillary force constraints

作　　者：杨珺 陆荻 宋雨楠 何岩峰[1] 王骏 赵静 YANG Jun;LU Di;SONG Yunan;HE Yanfeng;WANG Jun;ZHAO Jing(School of Petroleum Engineering,Changzhou University,Changzhou 213164,China;Department of Mathematics,University of Regina,Regina S4S 7J7,Canada;National Engineering Laboratory for Exploration and Development of Low-Permeable Oil and Gas Fields,Xi'an 710018,China)

机构地区：[1]常州大学石油与天然气工程学院,江苏常州213164 [2]里贾纳大学数学系,萨斯喀彻温里贾纳S4S 7J7 [3]低渗透油气田勘探开发国家工程实验室,陕西西安710018

出　　处：《常州大学学报（自然科学版）》2024年第6期1-11,共11页Journal of Changzhou University：Natural Science Edition

基　　金：常州大学科研启动基金资助项目(ZMF23020043)。

摘　　要：针对强毛管力条件的多孔介质,在结合实验数据进行合理简化的基础上,建立了新的油水两相渗吸模型,并采用拉普拉斯变换的方法,成功求解强毛管力项作用下的典型非线性偏微分方程。最后,通过与全隐式有限差分法计算的数值解结果,以及室内实验数据进行对比,证明了该解法在强毛管力条件下,一维两相不可压缩渗流问题中的可行性和准确性。研究提出了通过建立解析模型,在致密油藏强毛管力约束条件下,量化油水两相渗吸过程流量与饱和度的时间、空间分布动态规律的方法,有效解决了Buckley-Leverett方程在计算致密油藏介观尺度渗流过程的局限性。This paper presents an analytical solution for spontaneous and forced imbibition in porous media and proposes the corresponding simplified algorithm.The solving method employs Laplace transforms and successfully addresses typical nonlinear partial differential equations.Finally,after comparing with the numerical solutions computed by fully implicit finite difference method,the feasibility and accuracy of this method in one-dimensional two-phase flow is proved.An analytical model is developed in this study,which solves dynamic flow rate and saturation of biphasic fluid flow in porous media with non-negligible capillary forces,such as tight oil reservoirs.The proposed method can quantify fluid flow in porous media with significant capillary forces that is unable to be solved by Buckley-Leverett approach.

关 键 词：非常规油气藏开发 油水两相渗流 水驱 油层物理 解析模型 

分 类 号：O359.2[理学—流体力学]