Effect of Isolated Fracture on the Carbonate Acidizing Process

Carbonate reservoirs are one of the most important fossil fuel sources, and the acidizing stimulation is a practical technique for improving the recovery of carbonate reservoirs. In this study, the improved two-scale continuum model, including the representative elementary volume (REV) scale model a...

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Main Authors: Cunqi Jia, Tao Huang, Jun Yao, Hongchuan Xing, Haiyang Zhang
Format: Article
Language:English
Published: Frontiers Media S.A. 2021-07-01
Series:Frontiers in Earth Science
Subjects:
Online Access:https://www.frontiersin.org/articles/10.3389/feart.2021.698086/full
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spelling doaj-ae4c7cd08e664494b7d93fbd3614c1662021-07-08T04:51:09ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632021-07-01910.3389/feart.2021.698086698086Effect of Isolated Fracture on the Carbonate Acidizing ProcessCunqi Jia0Tao Huang1Jun Yao2Hongchuan Xing3Haiyang Zhang4School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, ChinaSchool of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao, ChinaPetroleum Department, Khalifa University, Abu Dhabi, United Arab EmiratesCarbonate reservoirs are one of the most important fossil fuel sources, and the acidizing stimulation is a practical technique for improving the recovery of carbonate reservoirs. In this study, the improved two-scale continuum model, including the representative elementary volume (REV) scale model and the upscaling model, is used to study the acidizing process with an isolated fracture. Based on this model, a comprehensive discussion is presented to study the effect of the physical parameters of the isolated fracture on the acidizing results and dissolution images, including the isolated fracture geometry, location, and morphology. Results show that the isolated fracture system is still the target system for the acidizing stimulation. The isolated fracture provides a limited contribution to the core porosity. The permeability of the core sample with fracture can be obviously increased only when the fracture penetrates through the whole sample. The existence of the isolated fracture reduces the consumption of acid solution to achieve a breakthrough. The acidizing curve is sensitive to the change of the length, aperture, and position of the isolated fracture. The acidizing curve difference corresponding to different rotation angles has not changed significantly for clockwise rotation and anticlockwise rotation groups.https://www.frontiersin.org/articles/10.3389/feart.2021.698086/fullfracture acidizingtwo-scale continuum modelcarbonate reservoirsreactive flowcarbonate acidizing
collection DOAJ
language English
format Article
sources DOAJ
author Cunqi Jia
Tao Huang
Jun Yao
Hongchuan Xing
Haiyang Zhang
spellingShingle Cunqi Jia
Tao Huang
Jun Yao
Hongchuan Xing
Haiyang Zhang
Effect of Isolated Fracture on the Carbonate Acidizing Process
Frontiers in Earth Science
fracture acidizing
two-scale continuum model
carbonate reservoirs
reactive flow
carbonate acidizing
author_facet Cunqi Jia
Tao Huang
Jun Yao
Hongchuan Xing
Haiyang Zhang
author_sort Cunqi Jia
title Effect of Isolated Fracture on the Carbonate Acidizing Process
title_short Effect of Isolated Fracture on the Carbonate Acidizing Process
title_full Effect of Isolated Fracture on the Carbonate Acidizing Process
title_fullStr Effect of Isolated Fracture on the Carbonate Acidizing Process
title_full_unstemmed Effect of Isolated Fracture on the Carbonate Acidizing Process
title_sort effect of isolated fracture on the carbonate acidizing process
publisher Frontiers Media S.A.
series Frontiers in Earth Science
issn 2296-6463
publishDate 2021-07-01
description Carbonate reservoirs are one of the most important fossil fuel sources, and the acidizing stimulation is a practical technique for improving the recovery of carbonate reservoirs. In this study, the improved two-scale continuum model, including the representative elementary volume (REV) scale model and the upscaling model, is used to study the acidizing process with an isolated fracture. Based on this model, a comprehensive discussion is presented to study the effect of the physical parameters of the isolated fracture on the acidizing results and dissolution images, including the isolated fracture geometry, location, and morphology. Results show that the isolated fracture system is still the target system for the acidizing stimulation. The isolated fracture provides a limited contribution to the core porosity. The permeability of the core sample with fracture can be obviously increased only when the fracture penetrates through the whole sample. The existence of the isolated fracture reduces the consumption of acid solution to achieve a breakthrough. The acidizing curve is sensitive to the change of the length, aperture, and position of the isolated fracture. The acidizing curve difference corresponding to different rotation angles has not changed significantly for clockwise rotation and anticlockwise rotation groups.
topic fracture acidizing
two-scale continuum model
carbonate reservoirs
reactive flow
carbonate acidizing
url https://www.frontiersin.org/articles/10.3389/feart.2021.698086/full
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