Title:
ACID FRACTURING SIMULATION METHOD CONSIDERING VARIABLE-VISCOSITY ACID DYNAMIC PROCESS
Document Type and Number:
WIPO Patent Application WO/2021/082130
Kind Code:
A1
Abstract:
Provided is an acid fracturing simulation method considering a variable-viscosity acid dynamic process: determining the relationship between the viscosity of a variable-viscosity acid and the shear rate, temperature, calcium ion concentration, pH value, and surfactant concentration, respectively, to establish a variable-viscosity constitutive equation; simulating the flow and reaction process of the variable-viscosity acid in a fracture system to obtain the pressure profile in the fracture system; taking the pressure profile in the fracture system as an internal boundary condition and the ground pressure as an external boundary condition, simulating and calculating the reaction process of variable-viscosity acid in a matrix; simulating the viscosity change of the acid in the matrix system and calculating the filtration loss rate; bringing the obtained filtration loss rate into the pressure profile in the fracture system of the step. The method solves the problem that the acid fracturing simulation technology of the prior art does not consider the dynamic filtration loss process of variable-viscosity acid, leading to the problem that the fracture length of the variable-viscosity acid fracturing simulation is not highly consistent with actual conditions, and achieves the purpose of simulating an acid-fracturing fracture morphology considering the dynamic reduction rate of variable-viscosity acid.
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Inventors:
LU LIZE (CN)
XUE HENG (CN)
HUANG ZUXI (CN)
WANG HEHUA (CN)
HE BING (CN)
LIU FEI (CN)
CHENG YI (CN)
MI QIANGBO (CN)
CAO XIANPING (CN)
LI XIN (CN)
JIANG LIPING (CN)
HUANG JINLA (CN)
ZANG KEYI (CN)
ZHANG BO (CN)
ZHOU CHANGJIANG (CN)
CEN YUDA (CN)
XIAO YONG (CN)
ZHAO XING (CN)
SUN ZHAOLEI (CN)
DUAN CE (CN)
RONG YUANSHUAI (CN)
WAN LIJUAN (CN)
CHENG YANG (CN)
HUANG HAIPING (CN)
HUANG KAI (CN)
WAN CHUANZHI (CN)
HAO CHENGSHUN (CN)
XUE HENG (CN)
HUANG ZUXI (CN)
WANG HEHUA (CN)
HE BING (CN)
LIU FEI (CN)
CHENG YI (CN)
MI QIANGBO (CN)
CAO XIANPING (CN)
LI XIN (CN)
JIANG LIPING (CN)
HUANG JINLA (CN)
ZANG KEYI (CN)
ZHANG BO (CN)
ZHOU CHANGJIANG (CN)
CEN YUDA (CN)
XIAO YONG (CN)
ZHAO XING (CN)
SUN ZHAOLEI (CN)
DUAN CE (CN)
RONG YUANSHUAI (CN)
WAN LIJUAN (CN)
CHENG YANG (CN)
HUANG HAIPING (CN)
HUANG KAI (CN)
WAN CHUANZHI (CN)
HAO CHENGSHUN (CN)
Application Number:
PCT/CN2019/120505
Publication Date:
May 06, 2021
Filing Date:
November 25, 2019
Export Citation:
Assignee:
CHENGDU NORTH PETROLEUM EXPLORATION AND DEVELOPMENT TECH COMPANY LIMITED (CN)
International Classes:
E21B43/26; G16C20/10
Foreign References:
| CN108225998A | 2018-06-29 | |||
| CN102928556A | 2013-02-13 | |||
| CN106050211A | 2016-10-26 | |||
| CN107725042A | 2018-02-23 | |||
| JP5704386B2 | 2015-04-22 | |||
| JP2018009939A | 2018-01-18 |
Attorney, Agent or Firm:
CHENGDU XINGZHI PATENT AGENCY (ORDINARY PARTNERSHIP) (CN)
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