公开(公告)号：US20240175340A1

公开(公告)日：2024-05-30

申请号：US18226472

申请日：2023-07-26

申请人： CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

发明人： Sen WANG ,  Kun WANG ,  Qihong FENG ,  Shunming LI ,  Yijing DU ,  Zheng WU ,  Xiang WANG ,  Jiyuan ZHANG ,  Xianmin ZHANG

IPC分类号： E21B43/16 ,  G01N15/08 ,  G06F30/28

CPC分类号： E21B43/162 ,  G01N15/0826 ,  G06F30/28 ,  G06F2113/08

摘要： The present disclosure relates to a method and system for predicting a time-varying principle of waterflooding oil reservoir formation parameters. Firstly, a T2 spectrum-pore size relation model is built according to a measured pore size distribution curve and a measured T2 spectrum. A T2 spectrum of a rock sample at different water injection amounts during a waterflooding physical simulation experiment is acquired. The acquired T2 spectrum at different water injection amounts is then converted into a pore size distribution at different water injection amounts, and a pore network model at different water injection amounts is built with the pore size distribution. Oil-water two-phase flow simulation is performed, and a corresponding oil-water two-phase relative permeability curve of the rock sample at different pore volume (PV) multiples is obtained eventually. The oil-water two-phase relative permeability curve is the formation parameters in the waterflooding oil reservoir.

公开(公告)号：US20240159643A1

公开(公告)日：2024-05-16

申请号：US18143601

申请日：2023-05-04

申请人： CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

发明人： Jiyuan ZHANG ,  Kuankuan WU ,  Qihong FENG ,  Sen WANG ,  Xianmin ZHANG ,  Wendong WANG ,  Yong QIN ,  Huajun DU

IPC分类号： G01N15/08

CPC分类号： G01N15/0826

摘要： The present disclosure relates to a method for determining oil and gas relative permeabilities of a reservoir. The method includes: drilling a cylindrical core from a to-be-tested reservoir; injecting an oil and gas mixture into the cylindrical core through the piston container at a set flow rate by using the relative permeability testing device, and reducing pressures at a control end of the back pressure valve in sequence to obtain experimental values acquired under each pressure at the control end of the back pressure valve; equivalently simulating developing performance of a producing well of the to-be-tested reservoir using a one-dimensional numerical simulation grid model based on current oil and gas phase relative permeability curves, so as to obtain simulation values at different times; constructing an objective function according to the experimental and simulation values; determining whether a value of the objective function reaches a preset target value.