The Woodford–Mississippian"Commingled Production"is a prolific unconventional hydrocarbon play in Oklahoma,USA.The tight reservoirs feature variations in produced fluid chemistry usually explained by differ...The Woodford–Mississippian"Commingled Production"is a prolific unconventional hydrocarbon play in Oklahoma,USA.The tight reservoirs feature variations in produced fluid chemistry usually explained by different possible source rocks.Such chemical variations are regularly obtained from bulk,molecular,and isotopic characteristics.In this study,we present a new geochemical investigation of gasoline range hydrocarbons,biomarkers,and diamondoids in oils from Mississippian carbonate and Woodford Shale.A set of oil/condensate samples were examined using high-performance gas chromatography and mass spectrometry.The result of the condensates from the Anadarko Basin shows a distinct geochemical fingerprint reflected in light hydrocarbon characterized by heptane star diagrams,convinced by biomarker characteristics and diamantane isomeric distributions.Two possible source rocks were identified,the Woodford Shale and Mississippian mudrocks,with a variable degree of mixing.Thermal maturity based on light hydrocarbon parameters indicates that condensates from the Anadarko Basin are of the highest maturity,followed by"Old"Woodford-sourced oils and central Oklahoma tight oils.These geochemical parameters shed light on petroleum migration within Devonian–Mississippian petroleum systems and mitigate geological risk in exploring and developing petroleum reservoirs.展开更多
The Gaussian beam migration(GBM) is a steady imaging approach, which has high accuracy and efficiency. Its implementation mainly includes the traditional frequency domain and the recent popular space-time domain. Firs...The Gaussian beam migration(GBM) is a steady imaging approach, which has high accuracy and efficiency. Its implementation mainly includes the traditional frequency domain and the recent popular space-time domain. Firstly, we use the upward ray tracing strategy to get the backward wavefields. Then,we use the dominant frequency of the seismic data to simplify the imaginary traveltime calculation of the wavefields, which can cut down the Fourier transform number compared with the traditional GBM in the space-time domain. In addition, we choose an optimized parameter for the take-off angle increment of the up-going and down-going rays. These optimizations help us get an efficient space-time-domain acoustic GBM approach. Typical four examples show that the proposed method can significantly improve the computational efficiency up to one or even two orders of magnitude in different models with different model parameters and produce good imaging results with comparable accuracy and resolution with the traditional GBM in the space-time domain.展开更多
Retraction Note to:Petroleum Science(2020)17:582-597https://doi.org/10.1007/s12182-020-00441-1The authors have retracted their article(Wang et al.2020)because of significant textual overlap with previously published w...Retraction Note to:Petroleum Science(2020)17:582-597https://doi.org/10.1007/s12182-020-00441-1The authors have retracted their article(Wang et al.2020)because of significant textual overlap with previously published works(Atwah et al.2019;Wang and Paul Philp 2019).All authors agree with this retraction.展开更多
For Cu-Ni-Si alloys,cold rolling is usually performed after solution treatment to enhance physical properties such as strength and electrical conductivity during the aging process.This paper reports the variation in m...For Cu-Ni-Si alloys,cold rolling is usually performed after solution treatment to enhance physical properties such as strength and electrical conductivity during the aging process.This paper reports the variation in microstructure and physical properties during the aging process of Cu-2.3Ni-0.5Si alloy cold-rolled at room temperature(RT) and cryogenic temperature(CT).When aged at 450℃ for 2 h,RT-rolled samples exhibited a maximum hardness of HV5234 with an electric conductivity of 39.9% IACS.For CTrolled samples,the peak hardness was achieved when the samples were aged at 450% for 1 h.展开更多
基金National Natural Science Foundation of China(No.41802152)Natural Science Foundation of Hubei Province,China(No.2017CFB321)+3 种基金Open Fund of Key Laboratory of Exploration Technologies for Oil and Gas Resources(Yangtze University),Ministry of Education,China(No.K2017-18)Open Foundation of Top Disciplines in Yangtze UniversityOpen Fund of State Key Laboratory of Petroleum Resources and ProspectingChina University of Petroleum,Beijing(No.PRP/open-1605)for providing financial support
文摘The Woodford–Mississippian"Commingled Production"is a prolific unconventional hydrocarbon play in Oklahoma,USA.The tight reservoirs feature variations in produced fluid chemistry usually explained by different possible source rocks.Such chemical variations are regularly obtained from bulk,molecular,and isotopic characteristics.In this study,we present a new geochemical investigation of gasoline range hydrocarbons,biomarkers,and diamondoids in oils from Mississippian carbonate and Woodford Shale.A set of oil/condensate samples were examined using high-performance gas chromatography and mass spectrometry.The result of the condensates from the Anadarko Basin shows a distinct geochemical fingerprint reflected in light hydrocarbon characterized by heptane star diagrams,convinced by biomarker characteristics and diamantane isomeric distributions.Two possible source rocks were identified,the Woodford Shale and Mississippian mudrocks,with a variable degree of mixing.Thermal maturity based on light hydrocarbon parameters indicates that condensates from the Anadarko Basin are of the highest maturity,followed by"Old"Woodford-sourced oils and central Oklahoma tight oils.These geochemical parameters shed light on petroleum migration within Devonian–Mississippian petroleum systems and mitigate geological risk in exploring and developing petroleum reservoirs.
基金jointly supported by the National Key Research and Development Program of China (2019YFC0605503)the National Natural Science Foundation of China (41821002, 41922028,41874149)+1 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA14010303)the Major Scientific and Technological Projects of CNPC (ZD2019-183-003)。
文摘The Gaussian beam migration(GBM) is a steady imaging approach, which has high accuracy and efficiency. Its implementation mainly includes the traditional frequency domain and the recent popular space-time domain. Firstly, we use the upward ray tracing strategy to get the backward wavefields. Then,we use the dominant frequency of the seismic data to simplify the imaginary traveltime calculation of the wavefields, which can cut down the Fourier transform number compared with the traditional GBM in the space-time domain. In addition, we choose an optimized parameter for the take-off angle increment of the up-going and down-going rays. These optimizations help us get an efficient space-time-domain acoustic GBM approach. Typical four examples show that the proposed method can significantly improve the computational efficiency up to one or even two orders of magnitude in different models with different model parameters and produce good imaging results with comparable accuracy and resolution with the traditional GBM in the space-time domain.
文摘Retraction Note to:Petroleum Science(2020)17:582-597https://doi.org/10.1007/s12182-020-00441-1The authors have retracted their article(Wang et al.2020)because of significant textual overlap with previously published works(Atwah et al.2019;Wang and Paul Philp 2019).All authors agree with this retraction.
基金financially supported by the Science & Technology Innovation 2025 of the Ningbo Major Special Project (No.2019B10087)the National Key R&D Program of China (No.2016YFB0301300)。
文摘For Cu-Ni-Si alloys,cold rolling is usually performed after solution treatment to enhance physical properties such as strength and electrical conductivity during the aging process.This paper reports the variation in microstructure and physical properties during the aging process of Cu-2.3Ni-0.5Si alloy cold-rolled at room temperature(RT) and cryogenic temperature(CT).When aged at 450℃ for 2 h,RT-rolled samples exhibited a maximum hardness of HV5234 with an electric conductivity of 39.9% IACS.For CTrolled samples,the peak hardness was achieved when the samples were aged at 450% for 1 h.
