Research on a Quantitative Evaluation Method for Reservoir Damage Induced by Waterflooding Rate Sensitivity in Tight Oil Reservoirs
This study was conducted to quantitatively evaluate the reservoir damage caused by waterflood-induced velocity sensitivity in the tight oil reservoirs of Block L in the Ordos Basin. This research investigated changes in reservoir pore–throat structure before and after waterflooding through laborator...
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| author | Zhaoyu Duan Yongchao Xue Ziyao Zhang Lan Yang Yongji Cai |
| author_facet | Zhaoyu Duan Yongchao Xue Ziyao Zhang Lan Yang Yongji Cai |
| author_sort | Zhaoyu Duan |
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| description | This study was conducted to quantitatively evaluate the reservoir damage caused by waterflood-induced velocity sensitivity in the tight oil reservoirs of Block L in the Ordos Basin. This research investigated changes in reservoir pore–throat structure before and after waterflooding through laboratory experiments. A velocity sensitivity characterization model was established as <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi></mrow></msub><mfenced separators="|"><mrow><mi>Q</mi></mrow></mfenced><mo>=</mo><mstyle scriptlevel="0" displaystyle="true"><mfrac><mrow><mrow><mrow><mi mathvariant="normal">Qexp</mi></mrow><mo></mo><mrow><mfenced separators="|"><mrow><mo>−</mo><mi>β</mi><msup><mrow><mfenced open="[" close="]" separators="|"><mrow><msub><mrow><mi>v</mi></mrow><mrow><mi>c</mi><mn>0</mn></mrow></msub><mfenced separators="|"><mrow><mn>1</mn><mo>+</mo><mi>λ</mi><msup><mrow><mi>Q</mi></mrow><mrow><mi>η</mi></mrow></msup></mrow></mfenced></mrow></mfenced></mrow><mrow><mi>δ</mi></mrow></msup></mrow></mfenced></mrow></mrow></mrow><mrow><mn>2</mn><mi>π</mi><mi>ϕ</mi><mi>h</mi><msub><mrow><mi>v</mi></mrow><mrow><mi>c</mi><mn>0</mn></mrow></msub><mfenced separators="|"><mrow><mn>1</mn><mo>+</mo><mi>λ</mi><msup><mrow><mi>Q</mi></mrow><mrow><mi>η</mi></mrow></msup></mrow></mfenced></mrow></mfrac></mstyle></mrow></semantics></math></inline-formula>, and the injection volume as Q, and its reliability was validated using both experimental and field data. The results indicate that excessive water injection can lead to permeability damage in the reservoir. Based on this model, the optimal injection rate for Block L was determined to be 16.8 m<sup>3</sup>/day. Field application of this optimized rate reduced velocity sensitivity-induced particle damage by 21% and improved oil recovery by 1.4%. |
| format | Article |
| id | doaj-art-41f69a43478f48eeac5d8ed2845989e4 |
| institution | OA Journals |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-04-01 |
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| series | Energies |
| spelling | doaj-art-41f69a43478f48eeac5d8ed2845989e42025-08-20T01:49:11ZengMDPI AGEnergies1996-10732025-04-01189225910.3390/en18092259Research on a Quantitative Evaluation Method for Reservoir Damage Induced by Waterflooding Rate Sensitivity in Tight Oil ReservoirsZhaoyu Duan0Yongchao Xue1Ziyao Zhang2Lan Yang3Yongji Cai4School of Petroleum Engineering, China University of Petroleum, Beijing 102249, ChinaSchool of Petroleum Engineering, China University of Petroleum, Beijing 102249, ChinaThe Second Oil Production Plant of Chang Qing Oilfield Branch, Qingyang 710061, ChinaThe Second Oil Production Plant of Chang Qing Oilfield Branch, Qingyang 710061, ChinaThe Second Oil Production Plant of Chang Qing Oilfield Branch, Qingyang 710061, ChinaThis study was conducted to quantitatively evaluate the reservoir damage caused by waterflood-induced velocity sensitivity in the tight oil reservoirs of Block L in the Ordos Basin. This research investigated changes in reservoir pore–throat structure before and after waterflooding through laboratory experiments. A velocity sensitivity characterization model was established as <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi></mrow></msub><mfenced separators="|"><mrow><mi>Q</mi></mrow></mfenced><mo>=</mo><mstyle scriptlevel="0" displaystyle="true"><mfrac><mrow><mrow><mrow><mi mathvariant="normal">Qexp</mi></mrow><mo></mo><mrow><mfenced separators="|"><mrow><mo>−</mo><mi>β</mi><msup><mrow><mfenced open="[" close="]" separators="|"><mrow><msub><mrow><mi>v</mi></mrow><mrow><mi>c</mi><mn>0</mn></mrow></msub><mfenced separators="|"><mrow><mn>1</mn><mo>+</mo><mi>λ</mi><msup><mrow><mi>Q</mi></mrow><mrow><mi>η</mi></mrow></msup></mrow></mfenced></mrow></mfenced></mrow><mrow><mi>δ</mi></mrow></msup></mrow></mfenced></mrow></mrow></mrow><mrow><mn>2</mn><mi>π</mi><mi>ϕ</mi><mi>h</mi><msub><mrow><mi>v</mi></mrow><mrow><mi>c</mi><mn>0</mn></mrow></msub><mfenced separators="|"><mrow><mn>1</mn><mo>+</mo><mi>λ</mi><msup><mrow><mi>Q</mi></mrow><mrow><mi>η</mi></mrow></msup></mrow></mfenced></mrow></mfrac></mstyle></mrow></semantics></math></inline-formula>, and the injection volume as Q, and its reliability was validated using both experimental and field data. The results indicate that excessive water injection can lead to permeability damage in the reservoir. Based on this model, the optimal injection rate for Block L was determined to be 16.8 m<sup>3</sup>/day. Field application of this optimized rate reduced velocity sensitivity-induced particle damage by 21% and improved oil recovery by 1.4%.https://www.mdpi.com/1996-1073/18/9/2259tight oil reservoirsrate sensitivitycharacterization modelcritical diffusion radiuswater injection optimization |
| spellingShingle | Zhaoyu Duan Yongchao Xue Ziyao Zhang Lan Yang Yongji Cai Research on a Quantitative Evaluation Method for Reservoir Damage Induced by Waterflooding Rate Sensitivity in Tight Oil Reservoirs Energies tight oil reservoirs rate sensitivity characterization model critical diffusion radius water injection optimization |
| title | Research on a Quantitative Evaluation Method for Reservoir Damage Induced by Waterflooding Rate Sensitivity in Tight Oil Reservoirs |
| title_full | Research on a Quantitative Evaluation Method for Reservoir Damage Induced by Waterflooding Rate Sensitivity in Tight Oil Reservoirs |
| title_fullStr | Research on a Quantitative Evaluation Method for Reservoir Damage Induced by Waterflooding Rate Sensitivity in Tight Oil Reservoirs |
| title_full_unstemmed | Research on a Quantitative Evaluation Method for Reservoir Damage Induced by Waterflooding Rate Sensitivity in Tight Oil Reservoirs |
| title_short | Research on a Quantitative Evaluation Method for Reservoir Damage Induced by Waterflooding Rate Sensitivity in Tight Oil Reservoirs |
| title_sort | research on a quantitative evaluation method for reservoir damage induced by waterflooding rate sensitivity in tight oil reservoirs |
| topic | tight oil reservoirs rate sensitivity characterization model critical diffusion radius water injection optimization |
| url | https://www.mdpi.com/1996-1073/18/9/2259 |
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