Effect of Diagenesis on the Quality of Sandstone Reservoirs Exposed to High-Temperature, Overpressure, and CO2-Charging Conditions: A Case Study of Upper Miocene Huangliu Sandstones of Dongfang District, Yinggehai Basin, South China Sea
The Upper Miocene Huangliu sandstones of the Dongfang district are currently regarded as an important exploration target in the Yinggehai Basin. Affected by the anomalous diagenetic environments of high temperature, overpressure, and CO2 fillings, the diagenetic evolution of the Huangliu sandstones...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2022-06-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.885602/full |
| _version_ | 1811247977366290432 |
|---|---|
| author | Xiaowei Lv Xiaowei Lv Xiaowei Lv Meiyan Fu Meiyan Fu Shaonan Zhang Xianghao Meng Xianghao Meng Yi Liu Xiaoqi Ding Xiaoqi Ding Ya Zhang Tengjiao Sun Tengjiao Sun |
| author_facet | Xiaowei Lv Xiaowei Lv Xiaowei Lv Meiyan Fu Meiyan Fu Shaonan Zhang Xianghao Meng Xianghao Meng Yi Liu Xiaoqi Ding Xiaoqi Ding Ya Zhang Tengjiao Sun Tengjiao Sun |
| author_sort | Xiaowei Lv |
| collection | DOAJ |
| description | The Upper Miocene Huangliu sandstones of the Dongfang district are currently regarded as an important exploration target in the Yinggehai Basin. Affected by the anomalous diagenetic environments of high temperature, overpressure, and CO2 fillings, the diagenetic evolution of the Huangliu sandstones appear complicated characteristics and subsequently exert a significant influence on reservoir development. Integrated methods employed in this study include an electron microscope, cathode luminescence, X-ray diffraction, scanning electron microscope, electron microprobe, stable isotope analysis, homogenization temperature, and physical property tests. By the comparative researches between the AF-1 and AF-2 areas of the Dongfang district, the aim of this study is to investigate the complex diagenetic modifications and their controlling effects on reservoir quality and development mechanism. With similar sedimentary features, the reservoirs in the AF-1 area exhibit slightly higher porosity than those of the AF-2 area. The permeability in the AF-1 area shows one or two orders of magnitude lower than that of the AF-2 area, and throats size distribution act as a critical factor to cause distinct diversities of permeability. In the AF-1 area, the later appearance of overpressure contributed to stronger compaction intensity and more loss of primary porosity. The dissolution induced by CO2-rich thermal fluids in late stage enhanced the secondary porosity significantly and improved the total porosity. However, extensive dissolution cause abundant precipitation including carbonate cement and authigenic illite in a closed diagenetic system, which lead to the decrease of reservoirs’ permeability. As for the AF-2 area, earlier occurrence of overpressure restrained mechanical compaction obviously and further retarded corrosion of organic acid, which preserved high proportions of primary porosity. Due to lesser impact by CO2 filling, the AF-2 area had a poor intensity of dissolution and cementation, and the authigenic illitization was also restrained significantly, which effectively prevented heavy damage on reservoir quality, and especially for permeability. Based on the diagenetic evolution pathways, two types of porosity evolution patterns are established. The effect degree on diagenesis by high temperature, overpressure, and CO2 filling vary significantly between the AF-1 and AF-2 areas. The two areas show different pathways of diagenetic evolution, forming two development patterns and exhibiting different reservoir types. |
| first_indexed | 2024-04-12T15:18:52Z |
| format | Article |
| id | doaj.art-c9eb503a17f9479298413cf22e44acec |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-12T15:18:52Z |
| publishDate | 2022-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-c9eb503a17f9479298413cf22e44acec2022-12-22T03:27:32ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-06-011010.3389/feart.2022.885602885602Effect of Diagenesis on the Quality of Sandstone Reservoirs Exposed to High-Temperature, Overpressure, and CO2-Charging Conditions: A Case Study of Upper Miocene Huangliu Sandstones of Dongfang District, Yinggehai Basin, South China SeaXiaowei Lv0Xiaowei Lv1Xiaowei Lv2Meiyan Fu3Meiyan Fu4Shaonan Zhang5Xianghao Meng6Xianghao Meng7Yi Liu8Xiaoqi Ding9Xiaoqi Ding10Ya Zhang11Tengjiao Sun12Tengjiao Sun13College of Energy Resource, Chengdu University of Technology, Chengdu, ChinaState Key Laboratory of Oil and Gas Geology and Exploitation, Chengdu, ChinaThe Research Institute of Henan Oilfield Company, SINOPEC, Zhengzhou, ChinaCollege of Energy Resource, Chengdu University of Technology, Chengdu, ChinaState Key Laboratory of Oil and Gas Geology and Exploitation, Chengdu, ChinaCollege of Geosciences and Technology, Southwest Petroleum University, Chengdu, ChinaCollege of Energy Resource, Chengdu University of Technology, Chengdu, ChinaState Key Laboratory of Oil and Gas Geology and Exploitation, Chengdu, ChinaThe Research Institute of Zhanjiang Branch of CNOOC, Zhanjiang, ChinaCollege of Energy Resource, Chengdu University of Technology, Chengdu, ChinaState Key Laboratory of Oil and Gas Geology and Exploitation, Chengdu, ChinaSouthwest Oil and Gas Field Company of Petro China Company Limited, Chengdu, ChinaCollege of Energy Resource, Chengdu University of Technology, Chengdu, ChinaState Key Laboratory of Oil and Gas Geology and Exploitation, Chengdu, ChinaThe Upper Miocene Huangliu sandstones of the Dongfang district are currently regarded as an important exploration target in the Yinggehai Basin. Affected by the anomalous diagenetic environments of high temperature, overpressure, and CO2 fillings, the diagenetic evolution of the Huangliu sandstones appear complicated characteristics and subsequently exert a significant influence on reservoir development. Integrated methods employed in this study include an electron microscope, cathode luminescence, X-ray diffraction, scanning electron microscope, electron microprobe, stable isotope analysis, homogenization temperature, and physical property tests. By the comparative researches between the AF-1 and AF-2 areas of the Dongfang district, the aim of this study is to investigate the complex diagenetic modifications and their controlling effects on reservoir quality and development mechanism. With similar sedimentary features, the reservoirs in the AF-1 area exhibit slightly higher porosity than those of the AF-2 area. The permeability in the AF-1 area shows one or two orders of magnitude lower than that of the AF-2 area, and throats size distribution act as a critical factor to cause distinct diversities of permeability. In the AF-1 area, the later appearance of overpressure contributed to stronger compaction intensity and more loss of primary porosity. The dissolution induced by CO2-rich thermal fluids in late stage enhanced the secondary porosity significantly and improved the total porosity. However, extensive dissolution cause abundant precipitation including carbonate cement and authigenic illite in a closed diagenetic system, which lead to the decrease of reservoirs’ permeability. As for the AF-2 area, earlier occurrence of overpressure restrained mechanical compaction obviously and further retarded corrosion of organic acid, which preserved high proportions of primary porosity. Due to lesser impact by CO2 filling, the AF-2 area had a poor intensity of dissolution and cementation, and the authigenic illitization was also restrained significantly, which effectively prevented heavy damage on reservoir quality, and especially for permeability. Based on the diagenetic evolution pathways, two types of porosity evolution patterns are established. The effect degree on diagenesis by high temperature, overpressure, and CO2 filling vary significantly between the AF-1 and AF-2 areas. The two areas show different pathways of diagenetic evolution, forming two development patterns and exhibiting different reservoir types.https://www.frontiersin.org/articles/10.3389/feart.2022.885602/fullHuangliu sandstoneshigh temperatureoverpressureCO2 dissolutiondiagenetic evolution |
| spellingShingle | Xiaowei Lv Xiaowei Lv Xiaowei Lv Meiyan Fu Meiyan Fu Shaonan Zhang Xianghao Meng Xianghao Meng Yi Liu Xiaoqi Ding Xiaoqi Ding Ya Zhang Tengjiao Sun Tengjiao Sun Effect of Diagenesis on the Quality of Sandstone Reservoirs Exposed to High-Temperature, Overpressure, and CO2-Charging Conditions: A Case Study of Upper Miocene Huangliu Sandstones of Dongfang District, Yinggehai Basin, South China Sea Frontiers in Earth Science Huangliu sandstones high temperature overpressure CO2 dissolution diagenetic evolution |
| title | Effect of Diagenesis on the Quality of Sandstone Reservoirs Exposed to High-Temperature, Overpressure, and CO2-Charging Conditions: A Case Study of Upper Miocene Huangliu Sandstones of Dongfang District, Yinggehai Basin, South China Sea |
| title_full | Effect of Diagenesis on the Quality of Sandstone Reservoirs Exposed to High-Temperature, Overpressure, and CO2-Charging Conditions: A Case Study of Upper Miocene Huangliu Sandstones of Dongfang District, Yinggehai Basin, South China Sea |
| title_fullStr | Effect of Diagenesis on the Quality of Sandstone Reservoirs Exposed to High-Temperature, Overpressure, and CO2-Charging Conditions: A Case Study of Upper Miocene Huangliu Sandstones of Dongfang District, Yinggehai Basin, South China Sea |
| title_full_unstemmed | Effect of Diagenesis on the Quality of Sandstone Reservoirs Exposed to High-Temperature, Overpressure, and CO2-Charging Conditions: A Case Study of Upper Miocene Huangliu Sandstones of Dongfang District, Yinggehai Basin, South China Sea |
| title_short | Effect of Diagenesis on the Quality of Sandstone Reservoirs Exposed to High-Temperature, Overpressure, and CO2-Charging Conditions: A Case Study of Upper Miocene Huangliu Sandstones of Dongfang District, Yinggehai Basin, South China Sea |
| title_sort | effect of diagenesis on the quality of sandstone reservoirs exposed to high temperature overpressure and co2 charging conditions a case study of upper miocene huangliu sandstones of dongfang district yinggehai basin south china sea |
| topic | Huangliu sandstones high temperature overpressure CO2 dissolution diagenetic evolution |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.885602/full |
| work_keys_str_mv | AT xiaoweilv effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT xiaoweilv effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT xiaoweilv effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT meiyanfu effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT meiyanfu effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT shaonanzhang effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT xianghaomeng effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT xianghaomeng effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT yiliu effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT xiaoqiding effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT xiaoqiding effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT yazhang effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT tengjiaosun effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea AT tengjiaosun effectofdiagenesisonthequalityofsandstonereservoirsexposedtohightemperatureoverpressureandco2chargingconditionsacasestudyofuppermiocenehuangliusandstonesofdongfangdistrictyinggehaibasinsouthchinasea |