The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform

Yu Xing-he - One of the best experts on this subject based on the ideXlab platform.

  • Pattern of Genesis-based Mudstone Distribution for Sandy Braided River: A Case Study of Sandy Braided-River Outcrop,Datong,Shanxi Province,China
    Natural Gas Geoscience, 2013
    Co-Authors: Yu Xing-he
    Abstract:

    Sandy braided river of Yungang Formation which is dominated by sands is composed of three typical lithofacies associations of Channel,Channel-bar and point bar.It as good oil/gas reservoirs has good reservoir properties,but there is muddy interlayer inside the sandy braided river deposits.According to measurement of typical outcrops of Jurassic sandy braided river in the Datong city,Shanxi province,we identify four genetic types of mudstone in the sandy braided rive deposits,i.e.mud plug,Channel lag mud,lateral accretion mud,and flood plain mud.According to genesis types,we take the Channels of single stage as basic unit to setup the distribution model of mudstone in the sandy braided river,limit the distribution range of mudstone of each genesis type.The distribution of mud plug,Channel lag mud and lateral accretion mud is constrained by Channels of single stage,while the distribution of flood plain mud is controlled by active Channel zones.The establishment of distribution pattern can provide a concept model for the effective prediction of the geometric shape,rules and scales of spatial distribution for mudstone in reservoirs of sandy braided river.

Aloysius K. Mok - One of the best experts on this subject based on the ideXlab platform.

  • IEEE Real-Time and Embedded Technology and Applications Symposium - Design of a Reliable Communication System for Grid-Style Traffic Light Networks
    2010 16th IEEE Real-Time and Embedded Technology and Applications Symposium, 2010
    Co-Authors: Junghoon Lee, Song Han, Aloysius K. Mok
    Abstract:

    This paper presents the design and analyzes the performance of a reliable communication scheme for the traffic control system built upon a wireless process control protocol, aiming at enhancing the robustness and timeliness of the safety-critical control applications. By exploiting the slot-based predictable access and the grid topology of urban area road networks, the proposed scheme establishes one primary and secondary route from the controller to each node and allocates the time slots accordingly. This is facilitated by a split-merge operation that makes a sender node sense the primary Channel(Channel to the primary receiver) and take the secondary Channel only if the first one is not free in a single slot, while making the receiver first listen to the primary sender and switch to the secondary sender. Our scheme also finds the path with the lowest error rate by modeling the split-merge operation as a single virtual link and applying shortest path algorithm. The experimental results show that the proposed scheme greatly enhances the transmission success ratio for the grid-style traffic control network and the improvement scales up with the network size. In addition, the routing scheme can further find the path that can improve the delivery ratio of control messages compared with the traditional grid routing scheme.

Guanglong Sheng - One of the best experts on this subject based on the ideXlab platform.

  • A New Methodology for the Multilayer Tight Oil Reservoir Water Injection Efficiency Evaluation and Real-Time Optimization
    Geofluids, 2020
    Co-Authors: Lin Cao, Jianlong Xiu, Hongjie Cheng, Hui Wang, Shujian Xie, Hui Zhao, Guanglong Sheng
    Abstract:

    It is important to determine the reasonable injection and production rates in the development of multilayer tight oil reservoir with water flooding treatment. Based on the INSIM (interconnection-based numeric simulation model), a connected network model, a new method is designed to evaluate the water injection efficiency of different layers in water flooding reservoirs and to optimize the injection-production system to produce more oil. Based on the types of sedimentary facies and corresponding injection-production data, the interwell connections are divided into four major categories (middle Channel, Channel edge, middle Channel bar, and Channel bar edge) and twelve subclasses. This classification standard of interwell connections could help to significantly improve the accuracy of judging the dominant flow path without constructing a complicated geological model. The interaction of interwells such as injection-production correlation and water injection efficiency could be revealed by simulating the production performance and computing the layer dividing coefficient and well dividing coefficient. A numerical example is used to validate this method by comparing results from FrontSim and this method, and the computational efficiency of this method is several dozen times faster than that of the traditional numerical simulation. This method is applied to quickly optimize the production schedule of a tight oil reservoir with the water flooding treatment, that is, the water injection rate of multilayer reservoirs could be optimized subtly by the injection efficiency of different layers, and the target of producing more oil with lower water cut could be achieved.

Junghoon Lee - One of the best experts on this subject based on the ideXlab platform.

  • IEEE Real-Time and Embedded Technology and Applications Symposium - Design of a Reliable Communication System for Grid-Style Traffic Light Networks
    2010 16th IEEE Real-Time and Embedded Technology and Applications Symposium, 2010
    Co-Authors: Junghoon Lee, Song Han, Aloysius K. Mok
    Abstract:

    This paper presents the design and analyzes the performance of a reliable communication scheme for the traffic control system built upon a wireless process control protocol, aiming at enhancing the robustness and timeliness of the safety-critical control applications. By exploiting the slot-based predictable access and the grid topology of urban area road networks, the proposed scheme establishes one primary and secondary route from the controller to each node and allocates the time slots accordingly. This is facilitated by a split-merge operation that makes a sender node sense the primary Channel(Channel to the primary receiver) and take the secondary Channel only if the first one is not free in a single slot, while making the receiver first listen to the primary sender and switch to the secondary sender. Our scheme also finds the path with the lowest error rate by modeling the split-merge operation as a single virtual link and applying shortest path algorithm. The experimental results show that the proposed scheme greatly enhances the transmission success ratio for the grid-style traffic control network and the improvement scales up with the network size. In addition, the routing scheme can further find the path that can improve the delivery ratio of control messages compared with the traditional grid routing scheme.

Lin Cao - One of the best experts on this subject based on the ideXlab platform.

  • A New Methodology for the Multilayer Tight Oil Reservoir Water Injection Efficiency Evaluation and Real-Time Optimization
    Geofluids, 2020
    Co-Authors: Lin Cao, Jianlong Xiu, Hongjie Cheng, Hui Wang, Shujian Xie, Hui Zhao, Guanglong Sheng
    Abstract:

    It is important to determine the reasonable injection and production rates in the development of multilayer tight oil reservoir with water flooding treatment. Based on the INSIM (interconnection-based numeric simulation model), a connected network model, a new method is designed to evaluate the water injection efficiency of different layers in water flooding reservoirs and to optimize the injection-production system to produce more oil. Based on the types of sedimentary facies and corresponding injection-production data, the interwell connections are divided into four major categories (middle Channel, Channel edge, middle Channel bar, and Channel bar edge) and twelve subclasses. This classification standard of interwell connections could help to significantly improve the accuracy of judging the dominant flow path without constructing a complicated geological model. The interaction of interwells such as injection-production correlation and water injection efficiency could be revealed by simulating the production performance and computing the layer dividing coefficient and well dividing coefficient. A numerical example is used to validate this method by comparing results from FrontSim and this method, and the computational efficiency of this method is several dozen times faster than that of the traditional numerical simulation. This method is applied to quickly optimize the production schedule of a tight oil reservoir with the water flooding treatment, that is, the water injection rate of multilayer reservoirs could be optimized subtly by the injection efficiency of different layers, and the target of producing more oil with lower water cut could be achieved.