Pore-scale study of the pressure-sensitive effect of sandstone and its influence on multiphase flows

Abstract The pressure-sensitive effect on the pore structure of sandstone was investigated using X-ray computed micro-tomography and QEMSCAN quantitative mineral analysis. In a physical simulation study, we extracted the pore network model from digital cores at different confining pressures and eval...

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Autores principales:	Jun-Jian Li, Yang Liu, Ya-Jun Gao, Bao-Yang Cheng, Han-Qiao Jiang
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2018
Materias:	Pressure sensitive QEMSCAN Micro-CT Pore network model Multiphase flow Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/014f48edebff484cb9a83ce1b3e09fec
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spelling	oai:doaj.org-article:014f48edebff484cb9a83ce1b3e09fec2021-12-02T12:03:43ZPore-scale study of the pressure-sensitive effect of sandstone and its influence on multiphase flows10.1007/s12182-018-0266-61672-51071995-8226https://doaj.org/article/014f48edebff484cb9a83ce1b3e09fec2018-10-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-018-0266-6https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract The pressure-sensitive effect on the pore structure of sandstone was investigated using X-ray computed micro-tomography and QEMSCAN quantitative mineral analysis. In a physical simulation study, we extracted the pore network model from digital cores at different confining pressures and evaluated the effect of pressure sensitivity on the multiphase displacement process. In both the pore network model and QEMSCAN scanning, the pore structure was observed to be damaged under a high confining pressure. Due to their different scales, the pores and throats exhibited inhomogeneous changes; further, the throats exhibited a significant variation compared to that exhibited by the pores. Meanwhile, the heterogeneity of the pore structure under the two aforementioned activities was aggravated by the elastic–plastic deformation of the pore structure. The pressure-sensitive effect increased the proportion of mineral particles, such as quartz (the main component of the core skeleton), and reduced the proportion of clay minerals. The clay minerals were originally attached to the pore walls or interspersed in the pores; however, as the pressure increased, the clay minerals accumulated in the pores resulting in blockage of the pores. While simulating the multiphase displacement process, increasing the confining pressure was observed to severely restrict the flowability of oil and water. This study promises to improve the efficiency of reservoir development in terms of oil and gas exploitation.Jun-Jian LiYang LiuYa-Jun GaoBao-Yang ChengHan-Qiao JiangKeAi Communications Co., Ltd.articlePressure sensitiveQEMSCANMicro-CTPore network modelMultiphase flowScienceQPetrologyQE420-499ENPetroleum Science, Vol 16, Iss 2, Pp 382-395 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Pressure sensitive QEMSCAN Micro-CT Pore network model Multiphase flow Science Q Petrology QE420-499
spellingShingle	Pressure sensitive QEMSCAN Micro-CT Pore network model Multiphase flow Science Q Petrology QE420-499 Jun-Jian Li Yang Liu Ya-Jun Gao Bao-Yang Cheng Han-Qiao Jiang Pore-scale study of the pressure-sensitive effect of sandstone and its influence on multiphase flows
description	Abstract The pressure-sensitive effect on the pore structure of sandstone was investigated using X-ray computed micro-tomography and QEMSCAN quantitative mineral analysis. In a physical simulation study, we extracted the pore network model from digital cores at different confining pressures and evaluated the effect of pressure sensitivity on the multiphase displacement process. In both the pore network model and QEMSCAN scanning, the pore structure was observed to be damaged under a high confining pressure. Due to their different scales, the pores and throats exhibited inhomogeneous changes; further, the throats exhibited a significant variation compared to that exhibited by the pores. Meanwhile, the heterogeneity of the pore structure under the two aforementioned activities was aggravated by the elastic–plastic deformation of the pore structure. The pressure-sensitive effect increased the proportion of mineral particles, such as quartz (the main component of the core skeleton), and reduced the proportion of clay minerals. The clay minerals were originally attached to the pore walls or interspersed in the pores; however, as the pressure increased, the clay minerals accumulated in the pores resulting in blockage of the pores. While simulating the multiphase displacement process, increasing the confining pressure was observed to severely restrict the flowability of oil and water. This study promises to improve the efficiency of reservoir development in terms of oil and gas exploitation.
format	article
author	Jun-Jian Li Yang Liu Ya-Jun Gao Bao-Yang Cheng Han-Qiao Jiang
author_facet	Jun-Jian Li Yang Liu Ya-Jun Gao Bao-Yang Cheng Han-Qiao Jiang
author_sort	Jun-Jian Li
title	Pore-scale study of the pressure-sensitive effect of sandstone and its influence on multiphase flows
title_short	Pore-scale study of the pressure-sensitive effect of sandstone and its influence on multiphase flows
title_full	Pore-scale study of the pressure-sensitive effect of sandstone and its influence on multiphase flows
title_fullStr	Pore-scale study of the pressure-sensitive effect of sandstone and its influence on multiphase flows
title_full_unstemmed	Pore-scale study of the pressure-sensitive effect of sandstone and its influence on multiphase flows
title_sort	pore-scale study of the pressure-sensitive effect of sandstone and its influence on multiphase flows
publisher	KeAi Communications Co., Ltd.
publishDate	2018
url	https://doaj.org/article/014f48edebff484cb9a83ce1b3e09fec
work_keys_str_mv	AT junjianli porescalestudyofthepressuresensitiveeffectofsandstoneanditsinfluenceonmultiphaseflows AT yangliu porescalestudyofthepressuresensitiveeffectofsandstoneanditsinfluenceonmultiphaseflows AT yajungao porescalestudyofthepressuresensitiveeffectofsandstoneanditsinfluenceonmultiphaseflows AT baoyangcheng porescalestudyofthepressuresensitiveeffectofsandstoneanditsinfluenceonmultiphaseflows AT hanqiaojiang porescalestudyofthepressuresensitiveeffectofsandstoneanditsinfluenceonmultiphaseflows
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Pore-scale study of the pressure-sensitive effect of sandstone and its influence on multiphase flows

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