Visualization experiments on polymer-weak gel profile control and displacement by NMR technique

Visualization experiments on polymer-weak gel profile control and displacement by NMR technique

The distribution and migration characteristics of weak gel in the core were observed by combining nuclear magnetic resonance (NMR) imaging technology with the core displacement experiment, and the oil displacement features of different polymer-weak gel combinations were examined with visualization e...

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Main Authors: Qinfeng DI, Jingnan ZHANG, Shuai HUA, Huijuan CHEN, Chunyuan GU
Format: Article
Language:English
Published: KeAi Communications Co., Ltd. 2017-04-01
Series:Petroleum Exploration and Development
Online Access:http://www.sciencedirect.com/science/article/pii/S1876380417300332
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spelling doaj-8e1ea43673444b62a66292fa9c5f88372021-02-02T05:49:09ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042017-04-01442294298Visualization experiments on polymer-weak gel profile control and displacement by NMR techniqueQinfeng DI0Jingnan ZHANG1Shuai HUA2Huijuan CHEN3Chunyuan GU4Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China; Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai 200072, China; Corresponding authorShanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China; Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai 200072, ChinaShanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China; Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai 200072, ChinaShanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China; Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai 200072, ChinaShanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China; Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai 200072, ChinaThe distribution and migration characteristics of weak gel in the core were observed by combining nuclear magnetic resonance (NMR) imaging technology with the core displacement experiment, and the oil displacement features of different polymer-weak gel combinations were examined with visualization experiments. Three combination patterns of polymer and weak gel were designed: waterflooding + polymer flooding (pattern 1), waterflooding + polymer flooding + weak gel flooding (pattern 2), and waterflooding + weak gel flooding + polymer flooding (pattern 3). The pressure variations, T2 spectra, nuclear magnetic resonance images, oil displacement efficiencies under the different patterns were analyzed. The results show that the nuclear magnetic images can not only provide the direct information of weak gel distribution and migration characteristics inside the core, but also reflect the distribution characteristics of remaining oil; the T2 spectrum characteristics indicate that both polymer and weak gel have the function of profile control and oil displacement, and the pattern 2 has the best profile control effect; of the three patterns, pattern 2 has the highest oil displacement efficiency of 78.84%, which is 18.33% higher than the displacement efficiency of water flooding in the initial stage. Key words: weak gel, polymer, nuclear magnetic resonance (NMR), visualization displacement experiment, oil displacement efficiencyhttp://www.sciencedirect.com/science/article/pii/S1876380417300332
collection DOAJ
language English
format Article
sources DOAJ
author Qinfeng DI
Jingnan ZHANG
Shuai HUA
Huijuan CHEN
Chunyuan GU
spellingShingle Qinfeng DI
Jingnan ZHANG
Shuai HUA
Huijuan CHEN
Chunyuan GU
Visualization experiments on polymer-weak gel profile control and displacement by NMR technique
Petroleum Exploration and Development
author_facet Qinfeng DI
Jingnan ZHANG
Shuai HUA
Huijuan CHEN
Chunyuan GU
author_sort Qinfeng DI
title Visualization experiments on polymer-weak gel profile control and displacement by NMR technique
title_short Visualization experiments on polymer-weak gel profile control and displacement by NMR technique
title_full Visualization experiments on polymer-weak gel profile control and displacement by NMR technique
title_fullStr Visualization experiments on polymer-weak gel profile control and displacement by NMR technique
title_full_unstemmed Visualization experiments on polymer-weak gel profile control and displacement by NMR technique
title_sort visualization experiments on polymer-weak gel profile control and displacement by nmr technique
publisher KeAi Communications Co., Ltd.
series Petroleum Exploration and Development
issn 1876-3804
publishDate 2017-04-01
description The distribution and migration characteristics of weak gel in the core were observed by combining nuclear magnetic resonance (NMR) imaging technology with the core displacement experiment, and the oil displacement features of different polymer-weak gel combinations were examined with visualization experiments. Three combination patterns of polymer and weak gel were designed: waterflooding + polymer flooding (pattern 1), waterflooding + polymer flooding + weak gel flooding (pattern 2), and waterflooding + weak gel flooding + polymer flooding (pattern 3). The pressure variations, T2 spectra, nuclear magnetic resonance images, oil displacement efficiencies under the different patterns were analyzed. The results show that the nuclear magnetic images can not only provide the direct information of weak gel distribution and migration characteristics inside the core, but also reflect the distribution characteristics of remaining oil; the T2 spectrum characteristics indicate that both polymer and weak gel have the function of profile control and oil displacement, and the pattern 2 has the best profile control effect; of the three patterns, pattern 2 has the highest oil displacement efficiency of 78.84%, which is 18.33% higher than the displacement efficiency of water flooding in the initial stage. Key words: weak gel, polymer, nuclear magnetic resonance (NMR), visualization displacement experiment, oil displacement efficiency
url http://www.sciencedirect.com/science/article/pii/S1876380417300332
work_keys_str_mv AT qinfengdi visualizationexperimentsonpolymerweakgelprofilecontrolanddisplacementbynmrtechnique
AT jingnanzhang visualizationexperimentsonpolymerweakgelprofilecontrolanddisplacementbynmrtechnique
AT shuaihua visualizationexperimentsonpolymerweakgelprofilecontrolanddisplacementbynmrtechnique
AT huijuanchen visualizationexperimentsonpolymerweakgelprofilecontrolanddisplacementbynmrtechnique
AT chunyuangu visualizationexperimentsonpolymerweakgelprofilecontrolanddisplacementbynmrtechnique
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