Novel method for determining the lower producing limits of pore-throat radius and permeability in tight oil reservoirs
Determination of the lower limit of flowing porosity for oil recovery from tight oil reservoirs is the key to promoting scientific and economic development of tight oil reservoirs. This study performed a comprehensive analysis based on pore-throat radius distribution measurements, low-temperature ni...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2021-11-01
|
Series: | Energy Reports |
Subjects: | |
Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484721001803 |
id |
doaj-4e1873195cf64b1fbe909226b87ee3c0 |
---|---|
record_format |
Article |
spelling |
doaj-4e1873195cf64b1fbe909226b87ee3c02021-03-27T04:28:14ZengElsevierEnergy Reports2352-48472021-11-01716511656Novel method for determining the lower producing limits of pore-throat radius and permeability in tight oil reservoirsQianhua Xiao0Zhiyuan Wang1Zhengming Yang2Zuping Xiang3Zhonghua Liu4Wei Yang5School of Oil and Gas Engineering, Chongqing University of Science & Technology, Chongqing, 401331, China; Corresponding authors.Fujian Engineering and Research Center of Safety Control for Ship Intelligent Navigation, Institute of Oceanography, Minjiang University, Fuzhou, Fujian, 350121, China; Corresponding authors.Institute of Porous Flow and Fluid Mechanics, University of Chinese Academy of Sciences, Langfang, Hebei, 065007, China; Institute of Porous Flow and Fluid Mechanics, Research Institute of Petroleum Exploration and Development, Beijing, 100049, ChinaSchool of Oil and Gas Engineering, Chongqing University of Science & Technology, Chongqing, 401331, ChinaSchool of Oil and Gas Engineering, Chongqing University of Science & Technology, Chongqing, 401331, ChinaSchool of Oil and Gas Engineering, Chongqing University of Science & Technology, Chongqing, 401331, ChinaDetermination of the lower limit of flowing porosity for oil recovery from tight oil reservoirs is the key to promoting scientific and economic development of tight oil reservoirs. This study performed a comprehensive analysis based on pore-throat radius distribution measurements, low-temperature nitrogen adsorption measurements, and centrifugation and nuclear magnetic resonance measurements to establish a method for calculating the bound water film thickness and, in turn, the lower limits of pore-throat radius and permeability. The method was applied on rock samples from typical tight oil reservoirs in the Daqing and Changqing oil regions in China. The results indicated that for a given reservoir, bound water film thickness tends to be constant. With decreasing permeability, bound water film thickness showed an L-shaped distribution curve due to the changes in the pore-throat structure and the impact of molecular forces. The flat segment of the distribution curve corresponded to the lower limit of pore-throat radius, while the curve inflection point corresponded to the lower limit of permeability. The pore-throat radius and permeability limits were 22 nm and 0.08 mD for the Daqing tight oil reservoir and 18 nm and 0.03 mD for the Changqing tight oil reservoir, respectively.http://www.sciencedirect.com/science/article/pii/S2352484721001803Tight oil reservoirLower limit of pore-throat radiusLower limit of permeabilityBound water film thicknessBound water volume |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qianhua Xiao Zhiyuan Wang Zhengming Yang Zuping Xiang Zhonghua Liu Wei Yang |
spellingShingle |
Qianhua Xiao Zhiyuan Wang Zhengming Yang Zuping Xiang Zhonghua Liu Wei Yang Novel method for determining the lower producing limits of pore-throat radius and permeability in tight oil reservoirs Energy Reports Tight oil reservoir Lower limit of pore-throat radius Lower limit of permeability Bound water film thickness Bound water volume |
author_facet |
Qianhua Xiao Zhiyuan Wang Zhengming Yang Zuping Xiang Zhonghua Liu Wei Yang |
author_sort |
Qianhua Xiao |
title |
Novel method for determining the lower producing limits of pore-throat radius and permeability in tight oil reservoirs |
title_short |
Novel method for determining the lower producing limits of pore-throat radius and permeability in tight oil reservoirs |
title_full |
Novel method for determining the lower producing limits of pore-throat radius and permeability in tight oil reservoirs |
title_fullStr |
Novel method for determining the lower producing limits of pore-throat radius and permeability in tight oil reservoirs |
title_full_unstemmed |
Novel method for determining the lower producing limits of pore-throat radius and permeability in tight oil reservoirs |
title_sort |
novel method for determining the lower producing limits of pore-throat radius and permeability in tight oil reservoirs |
publisher |
Elsevier |
series |
Energy Reports |
issn |
2352-4847 |
publishDate |
2021-11-01 |
description |
Determination of the lower limit of flowing porosity for oil recovery from tight oil reservoirs is the key to promoting scientific and economic development of tight oil reservoirs. This study performed a comprehensive analysis based on pore-throat radius distribution measurements, low-temperature nitrogen adsorption measurements, and centrifugation and nuclear magnetic resonance measurements to establish a method for calculating the bound water film thickness and, in turn, the lower limits of pore-throat radius and permeability. The method was applied on rock samples from typical tight oil reservoirs in the Daqing and Changqing oil regions in China. The results indicated that for a given reservoir, bound water film thickness tends to be constant. With decreasing permeability, bound water film thickness showed an L-shaped distribution curve due to the changes in the pore-throat structure and the impact of molecular forces. The flat segment of the distribution curve corresponded to the lower limit of pore-throat radius, while the curve inflection point corresponded to the lower limit of permeability. The pore-throat radius and permeability limits were 22 nm and 0.08 mD for the Daqing tight oil reservoir and 18 nm and 0.03 mD for the Changqing tight oil reservoir, respectively. |
topic |
Tight oil reservoir Lower limit of pore-throat radius Lower limit of permeability Bound water film thickness Bound water volume |
url |
http://www.sciencedirect.com/science/article/pii/S2352484721001803 |
work_keys_str_mv |
AT qianhuaxiao novelmethodfordeterminingthelowerproducinglimitsofporethroatradiusandpermeabilityintightoilreservoirs AT zhiyuanwang novelmethodfordeterminingthelowerproducinglimitsofporethroatradiusandpermeabilityintightoilreservoirs AT zhengmingyang novelmethodfordeterminingthelowerproducinglimitsofporethroatradiusandpermeabilityintightoilreservoirs AT zupingxiang novelmethodfordeterminingthelowerproducinglimitsofporethroatradiusandpermeabilityintightoilreservoirs AT zhonghualiu novelmethodfordeterminingthelowerproducinglimitsofporethroatradiusandpermeabilityintightoilreservoirs AT weiyang novelmethodfordeterminingthelowerproducinglimitsofporethroatradiusandpermeabilityintightoilreservoirs |
_version_ |
1724201374583881728 |