Natural gas

Predictive Control of Gas Injection in Natural Gas Transport Networks

The present sought to draw a comparison between Model Predictive Control performance and two other controllers named Simple PI and Selective PI in controlling large-scale natural gas transport networks. A nonlinear dynamic model of representative gas pipeline was derived from pipeline governing rules and simulated in SIMULINK® environment of MATLAB®. Control schemes were designed to provide a s...

Oil & Natural Gas Technology

Figure 1: Benthic mat surfaces 24 Figure 2: Fatty acids in mats 25 Figure 3: Gas headspace from mat incubations 26 Figure 4: Hierarchical clustering of mat phylochip gradient fractions 27 Figure 5: Phylochip hydridization intensities from mat incubations 28 Figure 6: Recovered benthic mat plate 29 Figure 7: Isotope incorporation from mat incubations 30 Figure 8: Relative abundance of taxa occup...

7 Natural Gas Hydrates

Oil & Natural Gas Technology

The Ellenburger Group of the West Texas Permian Basin is part of a Lower Ordovician carbonate platform sequence that covers a large area of the United States. During the Early Ordovician, the Permian Basin area was located on the southwest edge of the Laurentia plate between 20° and 30° latitude. The equator crossed northern Canada, situating Texas in a tropical to subtropical latitude. The are...

Oil & Natural Gas Technology

2 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclo...