The Madi rare metal granite is a complex massif,which contains a variety of rare metals,such as Nb,Ta,Li,and Be.In this paper,the geochemical characteristics of the granite were obtained by multi-collector inductively...The Madi rare metal granite is a complex massif,which contains a variety of rare metals,such as Nb,Ta,Li,and Be.In this paper,the geochemical characteristics of the granite were obtained by multi-collector inductively coupled mass spectrometry(MC-ICP-MS).The precise crystalline age of the granite was obtained from monazite U-Pb dating,and the source of the granite was determined using Li-Nd isotopes.The Madi rare metal granite is a high-K(calc-alkaline),peraluminous,S-type granite.The U-Pb monazite age indicates that the crystalline age of the granite is 175.6 Ma,which is Early Jurassic.The granite is characterized by a relatively wide range ofδ7 Li values(+2.99‰to+5.83‰)and high lithium concentrations(181 ppm to 1022 ppm).The lithium isotopic composition of the granite does not significantly correlate with the degree of magmatic differentiation.An insignificant amount of lithium isotope fractionation occurred during the granitic differentiation.The lithium isotopic composition of the granite significantly differs from that of the wall rock,but it is very similar to that of a primitive mantle peridotite xenolith(meanδ7 Li value+3.5‰).The plot of Li concentration versusδ7 Li indicates that the Li isotopic composition of the granite is similar to that of island arc lavas.Based on the above-described evidence,the granite was mainly derived from the crust,but it was contaminated by a deep granitic magma.展开更多
里约奥运会所有比赛场馆评论席评论声传输方式采用支持MADI接口的数字音频,传输介质为光纤通路,接收设备采用支持MADI接口的数字音频光端设备。本文介绍了MADI(Multi-channel Audio Digital Interface)的概念和传输特性,对其在里约奥运...里约奥运会所有比赛场馆评论席评论声传输方式采用支持MADI接口的数字音频,传输介质为光纤通路,接收设备采用支持MADI接口的数字音频光端设备。本文介绍了MADI(Multi-channel Audio Digital Interface)的概念和传输特性,对其在里约奥运会上的部署实施和应用情况进行了分析和说明。展开更多
Field development typically requires detailed petrophysical analysis and well defined hydraulic flow units for comprehensive formation evaluation and reservoir characterization. In the present study, pay zones petroph...Field development typically requires detailed petrophysical analysis and well defined hydraulic flow units for comprehensive formation evaluation and reservoir characterization. In the present study, pay zones petrophysics are studied using an assembly of well log data from 8 wells together with core plugs measurements. Petrophysical analysis showed a good reservoir quality with average water saturation increasing toward the East and Southeast of the study area. Using a multi-linear regression technique on well logs and core data, permeability is estimated at well locations for flow unit characterization and flow capacity calculation. Results showed that five hydraulic flow units are identified through the studied wells, with relatively good correlation. Such correlation indicated a good continuity in the net pay zone of Abu Madi Formation in the Nile Delta reservoirs. The developed hydraulic flow units (HFUs) are classified according to its hydraulic conductivity into two main categories: the first category comprises the units with low permeability (K 1270 mD). The reservoir flow capacity (RFC) of these units indicated the development of 4 distinct classes (~11, ~30, ~80, and greater than 130 D.ft). The wells within the Northwestern part of the study area showed three HFUs that relatively vary from those located at the Southeast where two HFUs are only developed. In addition, the Southeastern part of the reservoir is characterized by good RFC as indicated by the development of high order HFUs (3, 4, and 5) compared to the Northeastern part with predominated low order HFUs (1, 2, and 3). Such results are crucial for the efficient field development and profound reservoir management of oil and gas fields in the Nile Delta.展开更多
随着广播行业对安全播出、智能化和融合媒体需求的不断提升,传统音频工程协会标准3(Audio Engineering Society Standard 3,AES3)、多通道音频数字接口(Multi-channel Audio Digital Interface,MADI)传输架构已难以满足要求。对此,采用...随着广播行业对安全播出、智能化和融合媒体需求的不断提升,传统音频工程协会标准3(Audio Engineering Society Standard 3,AES3)、多通道音频数字接口(Multi-channel Audio Digital Interface,MADI)传输架构已难以满足要求。对此,采用基于网际互连协议的音频(Audio over Internet Protocol,AoIP)传输技术构建传输架构,采用双平面冗余设计方案打造智能广播总控系统。通过搭建冗余AoIP网络、智能化信号路由与监测系统,实现高精度精确时间协议(Precision Time Protocol,PTP)时钟同步,并引入人工智能(Artificial Intelligence,AI)驱动的故障预测算法,有效实现全广播信号的统一管理、智能调度以及安全播出保障。展开更多
The present study aims to integrate a large set of geological and geophysical data into a comprehensive model describing the depositional features of the Abu Madi/El Qar'a/Khilala gas fields.The model is based on ...The present study aims to integrate a large set of geological and geophysical data into a comprehensive model describing the depositional features of the Abu Madi/El Qar'a/Khilala gas fields.The model is based on the sequence stratigraphic framework of the Abu Madi Formation defined using cores,well logs,and time-migrated seismic data.Seismic trace attribute sections and relative acoustic impedance sections are also used.A possible depositional pattern for the main Level Ill is established,based on the lithological and petrophysical information derived from the seismic data analysis.The Abu Madi For-mation can be regarded as a depositional sequence recording the progressive drowning of the incised valley.The sequence is bounded at the base by an erosional unconformity,created by a drop in the level of the Late Messinian Sea,and at the top by a drowning unconformity related to the Early Pliocene transgression.The bottom of Level II divides the Abu Madi sequence into two smaller sequences.In both sequences,gas-bearing traps can be found in the Lowstand Systems Tracts,represented by the fluvial Level Ill and fluvial-deltaic Level Il,respectively.展开更多
基金the project of“Comprehensive integration and service of mineral geology and its metallogenic regularity in China”from China Geological Survey(Grant No.DD20160346)
文摘The Madi rare metal granite is a complex massif,which contains a variety of rare metals,such as Nb,Ta,Li,and Be.In this paper,the geochemical characteristics of the granite were obtained by multi-collector inductively coupled mass spectrometry(MC-ICP-MS).The precise crystalline age of the granite was obtained from monazite U-Pb dating,and the source of the granite was determined using Li-Nd isotopes.The Madi rare metal granite is a high-K(calc-alkaline),peraluminous,S-type granite.The U-Pb monazite age indicates that the crystalline age of the granite is 175.6 Ma,which is Early Jurassic.The granite is characterized by a relatively wide range ofδ7 Li values(+2.99‰to+5.83‰)and high lithium concentrations(181 ppm to 1022 ppm).The lithium isotopic composition of the granite does not significantly correlate with the degree of magmatic differentiation.An insignificant amount of lithium isotope fractionation occurred during the granitic differentiation.The lithium isotopic composition of the granite significantly differs from that of the wall rock,but it is very similar to that of a primitive mantle peridotite xenolith(meanδ7 Li value+3.5‰).The plot of Li concentration versusδ7 Li indicates that the Li isotopic composition of the granite is similar to that of island arc lavas.Based on the above-described evidence,the granite was mainly derived from the crust,but it was contaminated by a deep granitic magma.
文摘里约奥运会所有比赛场馆评论席评论声传输方式采用支持MADI接口的数字音频,传输介质为光纤通路,接收设备采用支持MADI接口的数字音频光端设备。本文介绍了MADI(Multi-channel Audio Digital Interface)的概念和传输特性,对其在里约奥运会上的部署实施和应用情况进行了分析和说明。
文摘Field development typically requires detailed petrophysical analysis and well defined hydraulic flow units for comprehensive formation evaluation and reservoir characterization. In the present study, pay zones petrophysics are studied using an assembly of well log data from 8 wells together with core plugs measurements. Petrophysical analysis showed a good reservoir quality with average water saturation increasing toward the East and Southeast of the study area. Using a multi-linear regression technique on well logs and core data, permeability is estimated at well locations for flow unit characterization and flow capacity calculation. Results showed that five hydraulic flow units are identified through the studied wells, with relatively good correlation. Such correlation indicated a good continuity in the net pay zone of Abu Madi Formation in the Nile Delta reservoirs. The developed hydraulic flow units (HFUs) are classified according to its hydraulic conductivity into two main categories: the first category comprises the units with low permeability (K 1270 mD). The reservoir flow capacity (RFC) of these units indicated the development of 4 distinct classes (~11, ~30, ~80, and greater than 130 D.ft). The wells within the Northwestern part of the study area showed three HFUs that relatively vary from those located at the Southeast where two HFUs are only developed. In addition, the Southeastern part of the reservoir is characterized by good RFC as indicated by the development of high order HFUs (3, 4, and 5) compared to the Northeastern part with predominated low order HFUs (1, 2, and 3). Such results are crucial for the efficient field development and profound reservoir management of oil and gas fields in the Nile Delta.
文摘随着广播行业对安全播出、智能化和融合媒体需求的不断提升,传统音频工程协会标准3(Audio Engineering Society Standard 3,AES3)、多通道音频数字接口(Multi-channel Audio Digital Interface,MADI)传输架构已难以满足要求。对此,采用基于网际互连协议的音频(Audio over Internet Protocol,AoIP)传输技术构建传输架构,采用双平面冗余设计方案打造智能广播总控系统。通过搭建冗余AoIP网络、智能化信号路由与监测系统,实现高精度精确时间协议(Precision Time Protocol,PTP)时钟同步,并引入人工智能(Artificial Intelligence,AI)驱动的故障预测算法,有效实现全广播信号的统一管理、智能调度以及安全播出保障。
文摘The present study aims to integrate a large set of geological and geophysical data into a comprehensive model describing the depositional features of the Abu Madi/El Qar'a/Khilala gas fields.The model is based on the sequence stratigraphic framework of the Abu Madi Formation defined using cores,well logs,and time-migrated seismic data.Seismic trace attribute sections and relative acoustic impedance sections are also used.A possible depositional pattern for the main Level Ill is established,based on the lithological and petrophysical information derived from the seismic data analysis.The Abu Madi For-mation can be regarded as a depositional sequence recording the progressive drowning of the incised valley.The sequence is bounded at the base by an erosional unconformity,created by a drop in the level of the Late Messinian Sea,and at the top by a drowning unconformity related to the Early Pliocene transgression.The bottom of Level II divides the Abu Madi sequence into two smaller sequences.In both sequences,gas-bearing traps can be found in the Lowstand Systems Tracts,represented by the fluvial Level Ill and fluvial-deltaic Level Il,respectively.
