Damage mechanism of water-based fracturing fluid to tight sandstone gas reservoirs: Improvement of The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T 5107-2016
At present, evaluation on reservoir damage induced by fracturing fluid mainly refers to The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T5107-2016 (referred to as the industry standard below). However, the fracturing fluid displacing core process stipulated in the indus...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2021-04-01
|
| Series: | Natural Gas Industry B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352854021000231 |
| _version_ | 1797285400606146560 |
|---|---|
| author | Hongming Tang Haoxuan Tang Jiang He Feng Zhao Liehui Zhang Jijia Liao Qian Wang Xuefang Yuan |
| author_facet | Hongming Tang Haoxuan Tang Jiang He Feng Zhao Liehui Zhang Jijia Liao Qian Wang Xuefang Yuan |
| author_sort | Hongming Tang |
| collection | DOAJ |
| description | At present, evaluation on reservoir damage induced by fracturing fluid mainly refers to The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T5107-2016 (referred to as the industry standard below). However, the fracturing fluid displacing core process stipulated in the industry standard is not consistent with the fast invading process of fracturing fluid into the reservoir under high pressure during the actual fracturing construction. Besides, the influences of fracturing fluid residues, gel breaking mode, original water saturation and other factors are not taken into consideration in the experiments to evaluate the damage of fracturing fluids. Thus, the accuracy of evaluation results is influenced. In this paper, tight sandstone cores of the Lower Jurassic Ahe Formation (J1a) in Dibei area of Kuqa Depression of the Tarim Basin were selected as samples. The invading process of fracturing fluid into a tight sandstone reservoir was simulated by modifying experimental process and method. Then, the damage degree of fracturing fluid to gas reservoir was evaluated and the damage mechanisms of fracturing fluid were analyzed systematically. And the following research results were obtained. First, the modified evaluation method takes into account the influences of several factors, such as the original water saturation of gas reservoir, the instantaneous “breakdown” effect of high-pressure during fracturing and the fracturing fluid residues, so it can evaluate the damage degree of fracturing fluid to tight sandstone gas reservoirs more objectively. Second, the evaluation results based on the industry standard show that the damage degree of fracturing fluid to the permeability of tight sandstone gas reservoirs is medium to strong, whereas the damage degree evaluated by the modified method is medium to weak. Third, the retention of fracturing fluid residues in fractures is the main cause of permeability damage. The residues can easily block fractures and fracture surface pores. Most of them retain in the pores in the surface layer of matrix cores (invasion depth less than 3 cm), so residues are filtered by matrix pores. Fourth, when fracturing fluid migrates inwards from the core surface, high molecular polymers retain in the form of thin-film lamellar, local flaky nodular and crystal inclusion in turn in the reservoir pores. Fifth, under the experimental conditions, salting-out crystals appear and are unevenly distributed in the cores. In fractures, salting-out crystals and high molecules are polymerized to form composite inclusions. In matrix pores, salting-out crystals and a small number of fragments (e.g. illite) are enclosed to form a complex. Sixth, migratory particles caused by speed sensitivity are usually combined with residues and high molecular polymers to form composite inclusions, thus blocking pores and fractures. |
| first_indexed | 2024-03-07T18:02:38Z |
| format | Article |
| id | doaj.art-663e7a25600740419b72ed7ee69a2bcf |
| institution | Directory Open Access Journal |
| issn | 2352-8540 |
| language | English |
| last_indexed | 2024-03-07T18:02:38Z |
| publishDate | 2021-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Natural Gas Industry B |
| spelling | doaj.art-663e7a25600740419b72ed7ee69a2bcf2024-03-02T10:27:25ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402021-04-0182163172Damage mechanism of water-based fracturing fluid to tight sandstone gas reservoirs: Improvement of The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T 5107-2016Hongming Tang0Haoxuan Tang1Jiang He2Feng Zhao3Liehui Zhang4Jijia Liao5Qian Wang6Xuefang Yuan7School of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan, 610500, China; Corresponding author.School of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan, 610500, ChinaSchool of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan, 610500, ChinaSchool of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan, 610500, ChinaState Key Laboratory of Oil & Gas Reservoir Geology and Exploitation//Southwest Petroleum University, Chengdu, Sichuan, 610500, ChinaSchool of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan, 610500, ChinaState Key Laboratory of Oil & Gas Reservoir Geology and Exploitation//Southwest Petroleum University, Chengdu, Sichuan, 610500, China; Oil and Gas Engineering Research Institute, PetroChina Tarim Oilfield Company, Korla, Xinjiang, 841000, ChinaOil and Gas Engineering Research Institute, PetroChina Tarim Oilfield Company, Korla, Xinjiang, 841000, ChinaAt present, evaluation on reservoir damage induced by fracturing fluid mainly refers to The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T5107-2016 (referred to as the industry standard below). However, the fracturing fluid displacing core process stipulated in the industry standard is not consistent with the fast invading process of fracturing fluid into the reservoir under high pressure during the actual fracturing construction. Besides, the influences of fracturing fluid residues, gel breaking mode, original water saturation and other factors are not taken into consideration in the experiments to evaluate the damage of fracturing fluids. Thus, the accuracy of evaluation results is influenced. In this paper, tight sandstone cores of the Lower Jurassic Ahe Formation (J1a) in Dibei area of Kuqa Depression of the Tarim Basin were selected as samples. The invading process of fracturing fluid into a tight sandstone reservoir was simulated by modifying experimental process and method. Then, the damage degree of fracturing fluid to gas reservoir was evaluated and the damage mechanisms of fracturing fluid were analyzed systematically. And the following research results were obtained. First, the modified evaluation method takes into account the influences of several factors, such as the original water saturation of gas reservoir, the instantaneous “breakdown” effect of high-pressure during fracturing and the fracturing fluid residues, so it can evaluate the damage degree of fracturing fluid to tight sandstone gas reservoirs more objectively. Second, the evaluation results based on the industry standard show that the damage degree of fracturing fluid to the permeability of tight sandstone gas reservoirs is medium to strong, whereas the damage degree evaluated by the modified method is medium to weak. Third, the retention of fracturing fluid residues in fractures is the main cause of permeability damage. The residues can easily block fractures and fracture surface pores. Most of them retain in the pores in the surface layer of matrix cores (invasion depth less than 3 cm), so residues are filtered by matrix pores. Fourth, when fracturing fluid migrates inwards from the core surface, high molecular polymers retain in the form of thin-film lamellar, local flaky nodular and crystal inclusion in turn in the reservoir pores. Fifth, under the experimental conditions, salting-out crystals appear and are unevenly distributed in the cores. In fractures, salting-out crystals and high molecules are polymerized to form composite inclusions. In matrix pores, salting-out crystals and a small number of fragments (e.g. illite) are enclosed to form a complex. Sixth, migratory particles caused by speed sensitivity are usually combined with residues and high molecular polymers to form composite inclusions, thus blocking pores and fractures.http://www.sciencedirect.com/science/article/pii/S2352854021000231Tight sandstone gas reservoirFracturing fluidDamage mechanismMatrixEvaluation methodHigh pressure “breakdown” |
| spellingShingle | Hongming Tang Haoxuan Tang Jiang He Feng Zhao Liehui Zhang Jijia Liao Qian Wang Xuefang Yuan Damage mechanism of water-based fracturing fluid to tight sandstone gas reservoirs: Improvement of The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T 5107-2016 Natural Gas Industry B Tight sandstone gas reservoir Fracturing fluid Damage mechanism Matrix Evaluation method High pressure “breakdown” |
| title | Damage mechanism of water-based fracturing fluid to tight sandstone gas reservoirs: Improvement of The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T 5107-2016 |
| title_full | Damage mechanism of water-based fracturing fluid to tight sandstone gas reservoirs: Improvement of The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T 5107-2016 |
| title_fullStr | Damage mechanism of water-based fracturing fluid to tight sandstone gas reservoirs: Improvement of The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T 5107-2016 |
| title_full_unstemmed | Damage mechanism of water-based fracturing fluid to tight sandstone gas reservoirs: Improvement of The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T 5107-2016 |
| title_short | Damage mechanism of water-based fracturing fluid to tight sandstone gas reservoirs: Improvement of The Evaluation Measurement for Properties of Water-based Fracturing Fluid: SY/T 5107-2016 |
| title_sort | damage mechanism of water based fracturing fluid to tight sandstone gas reservoirs improvement of the evaluation measurement for properties of water based fracturing fluid sy t 5107 2016 |
| topic | Tight sandstone gas reservoir Fracturing fluid Damage mechanism Matrix Evaluation method High pressure “breakdown” |
| url | http://www.sciencedirect.com/science/article/pii/S2352854021000231 |
| work_keys_str_mv | AT hongmingtang damagemechanismofwaterbasedfracturingfluidtotightsandstonegasreservoirsimprovementoftheevaluationmeasurementforpropertiesofwaterbasedfracturingfluidsyt51072016 AT haoxuantang damagemechanismofwaterbasedfracturingfluidtotightsandstonegasreservoirsimprovementoftheevaluationmeasurementforpropertiesofwaterbasedfracturingfluidsyt51072016 AT jianghe damagemechanismofwaterbasedfracturingfluidtotightsandstonegasreservoirsimprovementoftheevaluationmeasurementforpropertiesofwaterbasedfracturingfluidsyt51072016 AT fengzhao damagemechanismofwaterbasedfracturingfluidtotightsandstonegasreservoirsimprovementoftheevaluationmeasurementforpropertiesofwaterbasedfracturingfluidsyt51072016 AT liehuizhang damagemechanismofwaterbasedfracturingfluidtotightsandstonegasreservoirsimprovementoftheevaluationmeasurementforpropertiesofwaterbasedfracturingfluidsyt51072016 AT jijialiao damagemechanismofwaterbasedfracturingfluidtotightsandstonegasreservoirsimprovementoftheevaluationmeasurementforpropertiesofwaterbasedfracturingfluidsyt51072016 AT qianwang damagemechanismofwaterbasedfracturingfluidtotightsandstonegasreservoirsimprovementoftheevaluationmeasurementforpropertiesofwaterbasedfracturingfluidsyt51072016 AT xuefangyuan damagemechanismofwaterbasedfracturingfluidtotightsandstonegasreservoirsimprovementoftheevaluationmeasurementforpropertiesofwaterbasedfracturingfluidsyt51072016 |