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Title: Experimental investigation on oil migration and accumulation in tight sandstones

Abstract

Here, this study presents an experimental investigation to simulate and analyze the physical processes of oil migration and accumulation with 19 tight sandstone cores. Characteristic curves of oil migration were obtained by using the experimental results. It shows that the curve variations were mainly influenced by two factors: the permeability of the core and the viscosity of the injected oil. Based on the experimental results, we introduced three important parameters to quantitatively characterize and determine the processes of oil migration and accumulation in tight sandstones. The apparent permeability was introduced to describe the level of oil migration during experiments. The minimum migration pressure gradient (MMPG) and the terminal oil saturation were proposed to evaluate the features of the beginning and final stages of the migration, respectively. The relationships between MMPG, terminal oil saturation and mobility were analyzed, all showed strong linear relationships in the double logarithmic coordinate system. Furthermore, a prediction map of tight oil accumulation was plotted according to the measured oil saturation data, which could be used for estimating the scale and size of oil accumulation in tight reservoirs. Lastly, the concepts and results in this study provide valuable insight for understanding and quantitatively analyzing the processes ofmore » oil migration and accumulation in tight sandstones.« less

Authors:
 [1];  [2]; ORCiD logo [3]; ORCiD logo [3];  [4];  [2];  [2]
  1. China University of Petroleum, Beijing (China); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. China University of Petroleum, Beijing (China)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Utah, Salt Lake City, UT (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1467284
Report Number(s):
[LA-UR-18-25936]
[Journal ID: ISSN 0920-4105]
Grant/Contract Number:  
[AC52-06NA25396]
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Petroleum Science and Engineering
Additional Journal Information:
[ Journal Volume: 160; Journal Issue: C]; Journal ID: ISSN 0920-4105
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; Tight sandstone; Tight oil; Migration and accumulation; Apparent permeability; Minimum migration pressure gradient; Terminal oil saturation

Citation Formats

Zhang, Yongchao, Zeng, Jianhui, Dai, Zhenxue, Viswanathan, Hari S., Xiao, Ting, Ma, Yong, and Feng, Xiao. Experimental investigation on oil migration and accumulation in tight sandstones. United States: N. p., 2017. Web. doi:10.1016/j.petrol.2017.10.049.
Zhang, Yongchao, Zeng, Jianhui, Dai, Zhenxue, Viswanathan, Hari S., Xiao, Ting, Ma, Yong, & Feng, Xiao. Experimental investigation on oil migration and accumulation in tight sandstones. United States. doi:10.1016/j.petrol.2017.10.049.
Zhang, Yongchao, Zeng, Jianhui, Dai, Zhenxue, Viswanathan, Hari S., Xiao, Ting, Ma, Yong, and Feng, Xiao. Mon . "Experimental investigation on oil migration and accumulation in tight sandstones". United States. doi:10.1016/j.petrol.2017.10.049. https://www.osti.gov/servlets/purl/1467284.
@article{osti_1467284,
title = {Experimental investigation on oil migration and accumulation in tight sandstones},
author = {Zhang, Yongchao and Zeng, Jianhui and Dai, Zhenxue and Viswanathan, Hari S. and Xiao, Ting and Ma, Yong and Feng, Xiao},
abstractNote = {Here, this study presents an experimental investigation to simulate and analyze the physical processes of oil migration and accumulation with 19 tight sandstone cores. Characteristic curves of oil migration were obtained by using the experimental results. It shows that the curve variations were mainly influenced by two factors: the permeability of the core and the viscosity of the injected oil. Based on the experimental results, we introduced three important parameters to quantitatively characterize and determine the processes of oil migration and accumulation in tight sandstones. The apparent permeability was introduced to describe the level of oil migration during experiments. The minimum migration pressure gradient (MMPG) and the terminal oil saturation were proposed to evaluate the features of the beginning and final stages of the migration, respectively. The relationships between MMPG, terminal oil saturation and mobility were analyzed, all showed strong linear relationships in the double logarithmic coordinate system. Furthermore, a prediction map of tight oil accumulation was plotted according to the measured oil saturation data, which could be used for estimating the scale and size of oil accumulation in tight reservoirs. Lastly, the concepts and results in this study provide valuable insight for understanding and quantitatively analyzing the processes of oil migration and accumulation in tight sandstones.},
doi = {10.1016/j.petrol.2017.10.049},
journal = {Journal of Petroleum Science and Engineering},
number = [C],
volume = [160],
place = {United States},
year = {2017},
month = {10}
}

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