The Experts below are selected from a list of 204 Experts worldwide ranked by ideXlab platform
Peng Yang - One of the best experts on this subject based on the ideXlab platform.
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tectono thermal evolution of cambrian ordovician source rocks and implications for Hydrocarbon generation in the eastern tarim basin nw china
Journal of Asian Earth Sciences, 2020Co-Authors: Peng Yang, Zhanli Ren, Renjie Zhou, Jianxin Zhao, Liping ZhangAbstract:Abstract The tectono-thermal evolution is an important control on petroliferous basin development; however, this evolution is difficult to reconstruct in sedimentary basins subjected to multiple tectono-thermal events. The Tarim Basin is the largest petroliferous basin in northwestern China and hosts a complex oil–gas system comprising several sets of source, reservoir, and cap rocks that have experienced multiple tectonic, thermal, and sedimentary events. Large oil and gas reserves have been discovered in the central and northern Tarim Basin during the last 30 years, but none in the eastern part of the basin. This is generally attributed to the high thermal maturity reached by source rocks during the Late Ordovician, and subsequent Hydrocarbon Loss. Therefore, reconstructing the Cambrian–Ordovician tectono-thermal evolution is critical in facilitating successful oil and gas exploration in this region. We compiled equivalent vitrinite reflectance data (n = 178) of source rocks from seven wells in the Tarim Basin, which for Cambrian–Ordovician source rocks are >1.3%, beyond the Hydrocarbon generation threshold and in the main gas and dry gas generation stages. The Cambrian–Ordovician source rocks experienced rapid burial and heating during the Caledonian period, entered the Hydrocarbon generation stage during the Middle–Late Ordovician, and reached peak Hydrocarbon generation at the end-Caledonian period. They might have experienced secondary Hydrocarbon generation after the Jurassic. Homogenization temperatures of fluid inclusions (n = 616) from wells GC4, LX1, MD1, and YD2 as well as the modeled thermal evolution reveal a main Hydrocarbon generation event during the Caledonian period and a secondary event in the Yanshanian and Himalayan period in other wells (LX1, MD1, and YD2). Hercynian and Indosinian uplift and exhumation in the eastern Tarim Basin controlled the main structures, and faulting created favorable conditions for secondary Hydrocarbon generation and migration at this time. Since the Yanshanian and Himalayan, the Tarim Basin has experienced further sedimentation and heating, and the tectono-thermal evolution might have been related to the formation of the Tibetan Plateau. In summary, our reconstruction of the tectono-thermal evolution of Cambrian–Ordovician strata and the Hydrocarbon generation history of the Tarim Basin suggests that the eastern Tarim Basin may also have Hydrocarbon generation potential and can guide future oil and gas exploration.
Liping Zhang - One of the best experts on this subject based on the ideXlab platform.
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tectono thermal evolution of cambrian ordovician source rocks and implications for Hydrocarbon generation in the eastern tarim basin nw china
Journal of Asian Earth Sciences, 2020Co-Authors: Peng Yang, Zhanli Ren, Renjie Zhou, Jianxin Zhao, Liping ZhangAbstract:Abstract The tectono-thermal evolution is an important control on petroliferous basin development; however, this evolution is difficult to reconstruct in sedimentary basins subjected to multiple tectono-thermal events. The Tarim Basin is the largest petroliferous basin in northwestern China and hosts a complex oil–gas system comprising several sets of source, reservoir, and cap rocks that have experienced multiple tectonic, thermal, and sedimentary events. Large oil and gas reserves have been discovered in the central and northern Tarim Basin during the last 30 years, but none in the eastern part of the basin. This is generally attributed to the high thermal maturity reached by source rocks during the Late Ordovician, and subsequent Hydrocarbon Loss. Therefore, reconstructing the Cambrian–Ordovician tectono-thermal evolution is critical in facilitating successful oil and gas exploration in this region. We compiled equivalent vitrinite reflectance data (n = 178) of source rocks from seven wells in the Tarim Basin, which for Cambrian–Ordovician source rocks are >1.3%, beyond the Hydrocarbon generation threshold and in the main gas and dry gas generation stages. The Cambrian–Ordovician source rocks experienced rapid burial and heating during the Caledonian period, entered the Hydrocarbon generation stage during the Middle–Late Ordovician, and reached peak Hydrocarbon generation at the end-Caledonian period. They might have experienced secondary Hydrocarbon generation after the Jurassic. Homogenization temperatures of fluid inclusions (n = 616) from wells GC4, LX1, MD1, and YD2 as well as the modeled thermal evolution reveal a main Hydrocarbon generation event during the Caledonian period and a secondary event in the Yanshanian and Himalayan period in other wells (LX1, MD1, and YD2). Hercynian and Indosinian uplift and exhumation in the eastern Tarim Basin controlled the main structures, and faulting created favorable conditions for secondary Hydrocarbon generation and migration at this time. Since the Yanshanian and Himalayan, the Tarim Basin has experienced further sedimentation and heating, and the tectono-thermal evolution might have been related to the formation of the Tibetan Plateau. In summary, our reconstruction of the tectono-thermal evolution of Cambrian–Ordovician strata and the Hydrocarbon generation history of the Tarim Basin suggests that the eastern Tarim Basin may also have Hydrocarbon generation potential and can guide future oil and gas exploration.
Xiongqi Pang - One of the best experts on this subject based on the ideXlab platform.
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Destruction of Hydrocarbon reservoirs due to tectonic modifications: Conceptual models and quantitative evaluation on the Tarim Basin, China
Marine and Petroleum Geology, 2018Co-Authors: Xiongqi Pang, Hong Pang, Chengzao Jia, Haijun YangAbstract:Abstract The Tarim Basin in China is a complicated superimposed basin with four periods of Hydrocarbon accumulations and three periods of modifications due to tectonic movements, forming complicated Hydrocarbon reservoirs, many of which have gone through reservoir migration, reservoir scale reformation, reservoir damage and phase alterations a result of the tectonic events. Due to the complexity, the Hydrocarbon exploration in this region has low success drilling rate. It is of great importance to study the destruction to the early Hydrocarbon accumulations by the tectonic movements and quantitatively evaluate the remaining resource for understanding the current Hydrocarbon distribution and guiding the exploration. This study analyzed six periods of large tectonic events in the Tarim Basin, and found the destroyed Hydrocarbon volume was mainly controlled by four geological factors, including the ratio of the destroyed to the original Hydrocarbon amount, tectonic event number and sequence, and the cap seal capacity. Larger ratio of destroyed Hydrocarbon, less tectonic event number, later sequence and stronger cap seal capacity lead to more Hydrocarbons preserved through the tectonic events. Based on the geological analysis, we established quantitative relationships among the destroyed Hydrocarbon volume by the tectonic events (Ql), the volume of primary Hydrocarbon accumulation (Q0), the ratio of destroyed Hydrocarbon (Kl), the tectonic event number (n) and sequence (i), and cap seal capacity (fc). Using these relationships and the calibrated geological parameters, we delineated the Hydrocarbon accumulation and destruction history and quantified the Hydrocarbon Loss due to the tectonic events for both the Tazhong area and the whole Tarim Basin. In the Tazhong area, four major accumulation events occurred at 510 Ma, 298 Ma, 227 Ma and 38 Ma with each accumulation underwent 68%, 59%, 28% and 0% of Hydrocarbon Loss due to later tectonic events. In total, over 60% of the original Hydrocarbon reserves have been destroyed in the Tarim Basin, with an estimate of ca. 1.9 billion tons remaining Hydrocarbons in the Tazhong area. At present, more than 95% oil and gas reservoirs and over 93% high quality exploration wells are located in the areas with high remaining resource potential predicted in this study, whereas 70% non-commercial production wells are located outside. Overall, this work shows that a careful evaluation of the damage to reservoirs from tectonic events can considerably enhance the success rate of Hydrocarbon exploration.
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Estimation of the Hydrocarbon Loss through major tectonic events in the Tazhong area, Tarim Basin, west China
Marine and Petroleum Geology, 2012Co-Authors: Hong Pang, Xiongqi Pang, Jing Chen, Keyu Liu, Caifu XiangAbstract:Abstract The Tazhong area, located in the central part of the Tarim Basin, is the major commercial oil and gas province in the Tarim Basin. Hydrocarbons have been discovered in the Ordovician, Silurian and Carboniferous reservoirs. Most of the Hydrocarbon reservoirs in the Tazhong area have experienced post-charge and accumulation readjustment or Loss associated with multiple post-charge tectonic movements. The relationship between the destroyed Hydrocarbon proportion (DHP) caused by tectonic events and tectonic movement intensity (TMI) in 15 well blocks has been established for the entire Tazhong area using TMI analysis. TMI can be quantitatively characterized by the denudation thickness and effective caprock thickness ratio, whereas the DHP can be quantitatively determined by the variations of the palaeo and current oil-water contacts. There appears to be a good relationship between DHP and TMI with a correlation coefficient of 0.9. Most of the original Ordovician Hydrocarbon accumulations formed in the late Ordovician had been lost, with an average DHP of up to 70%. The tectonic movement is much weaker in the late Silurian and late Permian period, with the DHPs for the Silurian reservoirs and Carboniferous reservoirs in the eastern Tazhong area averaging 50%. All the DHPs show a gradual increase from west to the east ( Figure 17 , Figure 18 , Figure 19 ). The preservation condition of the reservoirs is generally better in west than in the east.
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Quantitative studies of Hydrocarbon Loss of the Silurian bitumen sandstone in the Tarim Basin
Science in China Series D: Earth Sciences, 2008Co-Authors: Zhenxue Jiang, Xiongqi Pang, Luofu Liu, Xiandong Wang, Jun ZhangAbstract:The evolution of Tarim Basin experienced several tectonic movements, of which Caledonian movement caused a serious damage to reservoirs of Silurian. The earlier reservoirs size and the later Hydrocarbon Loss are two key factors to exploration prospect of Silurian. On the basis of net thickness of bituminous sandstone and recovery coefficient of crude oil converting to bitumen, the scale of the Hydrocarbon Loss of palaeo-accumulation in bitumen sandstone of Silurian was calculated (86.30×108t). The determination of net thickness of bitumen sandstone was completed mainly by several methods, such as physical property demarcation, observing lithology, grains with oil inclusion (GOI) technology, and quantitative grains fluorescence (QGF) technology. The samples of black sandstone and white sandstone were collected and compared by means of the methods mentioned above. The results showed that there was little Hydrocarbon, or none, in the white sandstone. The recovery coefficient was obtained by the analyses of plentiful physical parameters of crude oil and bitumen sandstone, based on the hypothesis that nonHydrocarbon compounds and bitumen were invariable in the process of bitumen forming. The calculated result, which is more scientific and actual, indicates the exploration prospect is more promising in Silurian of the Tarim Basin.
Hong Pang - One of the best experts on this subject based on the ideXlab platform.
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Destruction of Hydrocarbon reservoirs due to tectonic modifications: Conceptual models and quantitative evaluation on the Tarim Basin, China
Marine and Petroleum Geology, 2018Co-Authors: Xiongqi Pang, Hong Pang, Chengzao Jia, Haijun YangAbstract:Abstract The Tarim Basin in China is a complicated superimposed basin with four periods of Hydrocarbon accumulations and three periods of modifications due to tectonic movements, forming complicated Hydrocarbon reservoirs, many of which have gone through reservoir migration, reservoir scale reformation, reservoir damage and phase alterations a result of the tectonic events. Due to the complexity, the Hydrocarbon exploration in this region has low success drilling rate. It is of great importance to study the destruction to the early Hydrocarbon accumulations by the tectonic movements and quantitatively evaluate the remaining resource for understanding the current Hydrocarbon distribution and guiding the exploration. This study analyzed six periods of large tectonic events in the Tarim Basin, and found the destroyed Hydrocarbon volume was mainly controlled by four geological factors, including the ratio of the destroyed to the original Hydrocarbon amount, tectonic event number and sequence, and the cap seal capacity. Larger ratio of destroyed Hydrocarbon, less tectonic event number, later sequence and stronger cap seal capacity lead to more Hydrocarbons preserved through the tectonic events. Based on the geological analysis, we established quantitative relationships among the destroyed Hydrocarbon volume by the tectonic events (Ql), the volume of primary Hydrocarbon accumulation (Q0), the ratio of destroyed Hydrocarbon (Kl), the tectonic event number (n) and sequence (i), and cap seal capacity (fc). Using these relationships and the calibrated geological parameters, we delineated the Hydrocarbon accumulation and destruction history and quantified the Hydrocarbon Loss due to the tectonic events for both the Tazhong area and the whole Tarim Basin. In the Tazhong area, four major accumulation events occurred at 510 Ma, 298 Ma, 227 Ma and 38 Ma with each accumulation underwent 68%, 59%, 28% and 0% of Hydrocarbon Loss due to later tectonic events. In total, over 60% of the original Hydrocarbon reserves have been destroyed in the Tarim Basin, with an estimate of ca. 1.9 billion tons remaining Hydrocarbons in the Tazhong area. At present, more than 95% oil and gas reservoirs and over 93% high quality exploration wells are located in the areas with high remaining resource potential predicted in this study, whereas 70% non-commercial production wells are located outside. Overall, this work shows that a careful evaluation of the damage to reservoirs from tectonic events can considerably enhance the success rate of Hydrocarbon exploration.
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Estimation of the Hydrocarbon Loss through major tectonic events in the Tazhong area, Tarim Basin, west China
Marine and Petroleum Geology, 2012Co-Authors: Hong Pang, Xiongqi Pang, Jing Chen, Keyu Liu, Caifu XiangAbstract:Abstract The Tazhong area, located in the central part of the Tarim Basin, is the major commercial oil and gas province in the Tarim Basin. Hydrocarbons have been discovered in the Ordovician, Silurian and Carboniferous reservoirs. Most of the Hydrocarbon reservoirs in the Tazhong area have experienced post-charge and accumulation readjustment or Loss associated with multiple post-charge tectonic movements. The relationship between the destroyed Hydrocarbon proportion (DHP) caused by tectonic events and tectonic movement intensity (TMI) in 15 well blocks has been established for the entire Tazhong area using TMI analysis. TMI can be quantitatively characterized by the denudation thickness and effective caprock thickness ratio, whereas the DHP can be quantitatively determined by the variations of the palaeo and current oil-water contacts. There appears to be a good relationship between DHP and TMI with a correlation coefficient of 0.9. Most of the original Ordovician Hydrocarbon accumulations formed in the late Ordovician had been lost, with an average DHP of up to 70%. The tectonic movement is much weaker in the late Silurian and late Permian period, with the DHPs for the Silurian reservoirs and Carboniferous reservoirs in the eastern Tazhong area averaging 50%. All the DHPs show a gradual increase from west to the east ( Figure 17 , Figure 18 , Figure 19 ). The preservation condition of the reservoirs is generally better in west than in the east.
Zhanli Ren - One of the best experts on this subject based on the ideXlab platform.
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tectono thermal evolution of cambrian ordovician source rocks and implications for Hydrocarbon generation in the eastern tarim basin nw china
Journal of Asian Earth Sciences, 2020Co-Authors: Peng Yang, Zhanli Ren, Renjie Zhou, Jianxin Zhao, Liping ZhangAbstract:Abstract The tectono-thermal evolution is an important control on petroliferous basin development; however, this evolution is difficult to reconstruct in sedimentary basins subjected to multiple tectono-thermal events. The Tarim Basin is the largest petroliferous basin in northwestern China and hosts a complex oil–gas system comprising several sets of source, reservoir, and cap rocks that have experienced multiple tectonic, thermal, and sedimentary events. Large oil and gas reserves have been discovered in the central and northern Tarim Basin during the last 30 years, but none in the eastern part of the basin. This is generally attributed to the high thermal maturity reached by source rocks during the Late Ordovician, and subsequent Hydrocarbon Loss. Therefore, reconstructing the Cambrian–Ordovician tectono-thermal evolution is critical in facilitating successful oil and gas exploration in this region. We compiled equivalent vitrinite reflectance data (n = 178) of source rocks from seven wells in the Tarim Basin, which for Cambrian–Ordovician source rocks are >1.3%, beyond the Hydrocarbon generation threshold and in the main gas and dry gas generation stages. The Cambrian–Ordovician source rocks experienced rapid burial and heating during the Caledonian period, entered the Hydrocarbon generation stage during the Middle–Late Ordovician, and reached peak Hydrocarbon generation at the end-Caledonian period. They might have experienced secondary Hydrocarbon generation after the Jurassic. Homogenization temperatures of fluid inclusions (n = 616) from wells GC4, LX1, MD1, and YD2 as well as the modeled thermal evolution reveal a main Hydrocarbon generation event during the Caledonian period and a secondary event in the Yanshanian and Himalayan period in other wells (LX1, MD1, and YD2). Hercynian and Indosinian uplift and exhumation in the eastern Tarim Basin controlled the main structures, and faulting created favorable conditions for secondary Hydrocarbon generation and migration at this time. Since the Yanshanian and Himalayan, the Tarim Basin has experienced further sedimentation and heating, and the tectono-thermal evolution might have been related to the formation of the Tibetan Plateau. In summary, our reconstruction of the tectono-thermal evolution of Cambrian–Ordovician strata and the Hydrocarbon generation history of the Tarim Basin suggests that the eastern Tarim Basin may also have Hydrocarbon generation potential and can guide future oil and gas exploration.