A new method of gas reservoir evaluation based on neutron cross section logging

2021 ◽  
pp. 109750
Author(s):  
Xinyue Fu ◽  
Wensheng Wu ◽  
Hu Wang ◽  
Yunlong Ge
Keyword(s):  
Cross Section ◽  
Neutron Cross Section ◽  
New Method ◽  
Gas Reservoir ◽  
Reservoir Evaluation

scholarly journals A New Method for Fracturing Wells Reservoir Evaluation in Fractured Gas Reservoir

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Jianchun Guo ◽  
Yong Xiao ◽  
Haiyan Zhu
Keyword(s):  
Evaluation Model ◽  
New Method ◽  
Natural Fracture ◽  
Fuzzy Arithmetic ◽  
Fuzzy Evaluation ◽  
Natural Fractures ◽  
Gas Reservoir ◽  
Reservoir Evaluation ◽  
Gray Correlation ◽  
Fuzzy Logic Theory

Natural fracture is a geological phenomenon widely distributed in tight formation, and fractured gas reservoir stimulation effect mainly depends on the communication of natural fractures. Therefore it is necessary to carry out the evaluation of this reservoir and to find out the optimal natural fractures development wells. By analyzing the interactions and nonlinear relationships of the parameters, it establishes three-level index system of reservoir evaluation and proposes a new method for gas well reservoir evaluation model in fractured gas reservoir on the basis of fuzzy logic theory and multilevel gray correlation. For this method, the Gaussian membership functions to quantify the degree of every factor in the decision-making system and the multilevel gray relation to determine the weight of each parameter on stimulation effect. Finally through fuzzy arithmetic operator between multilevel weights and fuzzy evaluation matrix, score, rank, the reservoir quality, and predicted production will be gotten. Result of this new method shows that the evaluation of the production coincidence rate reaches 80%, which provides a new way for fractured gas reservoir evaluation.

Investigation of the total neutron cross section for natural hafnium on the filtred neutron beam with energy 59 keV

2011 ◽  
Vol 30 (0) ◽  
pp. 142-147
Author(s):  
О. О. Грицай ◽  
А. К. Гримало ◽  
В. В. Колотий ◽  
В. М. Венедиктов ◽  
С. П. Волковецький ◽  
...  
Keyword(s):  
Cross Section ◽  
Neutron Beam ◽  
Neutron Cross Section ◽  
Total Neutron ◽  
Total Neutron Cross Section

scholarly journals The Power Losses in Cable Lines Supplying Nonlinear Loads

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1374
Author(s):  
Bartosz Rozegnał ◽  
Paweł Albrechtowicz ◽  
Dominik Mamcarz ◽  
Monika Rerak ◽  
Maciej Skaza
Keyword(s):  
Bessel Function ◽  
Cross Section ◽  
Power Loss ◽  
Sine Wave ◽  
Active Power ◽  
New Method ◽  
Power Losses ◽  
Nonlinear Loads ◽  
Current Harmonics ◽  
Cable Lines

This paper presents the skin effect impact on the active power losses in the sheathless single-core cables/wires supplying nonlinear loads. There are significant conductor losses when the current has a distorted waveform (e.g., the current supplying diode rectifiers). The authors present a new method for active power loss calculation. The obtained results have been compared to the IEC-60287-1-1:2006 + A1:2014 standard method and the method based on the Bessel function. For all methods, the active power loss results were convergent for small-cable cross-section areas. The proposed method gives smaller power loss values for these cable sizes than the IEC and Bessel function methods. For cable cross-section areas greater than 185 mm2, the obtained results were better than those for the other methods. There were also analyses of extra power losses for distorted currents compared to an ideal 50 Hz sine wave for all methods. The new method is based on the current penetration depth factor calculated for every considered current harmonics, which allows us to calculate the precise equivalent resistance for any cable size. This research is part of our work on a cable thermal analysis method that has been developed.

Measurement of the Thermal Neutron Cross Section of the90Sr(n, γ)91Sr Reaction

1994 ◽  
Vol 31 (3) ◽  
pp. 173-179 ◽  
Author(s):  
Hideo HARADA ◽  
Toshiaki SEKINE ◽  
Yuichi HATSUKAWA ◽  
Noriko SHIGETA ◽  
Katsutoshi KOBAYASHI ◽  
...  
Keyword(s):  
Thermal Neutron ◽  
Cross Section ◽  
Neutron Cross Section ◽  
Thermal Neutron Cross Section

A Bent Crystal Neutron Spectrometer and Its Application to Neutron Cross-Section Measurements

1947 ◽  
Vol 72 (2) ◽  
pp. 109-115 ◽  
Author(s):  
R. B. Sawyer ◽  
E. O. Wollan ◽  
S. Bernstein ◽  
K. C. Peterson
Keyword(s):  
Cross Section ◽  
Neutron Cross Section ◽  
Neutron Spectrometer ◽  
Bent Crystal

Total Neutron Cross Section of Deuterium below 1000 keV

1972 ◽  
Vol 29 (26) ◽  
pp. 1745-1748 ◽  
Author(s):  
P. Stoler ◽  
N. N. Kaushal ◽  
F. Green ◽  
Edward Harms ◽  
Luciano Laroze
Keyword(s):  
Cross Section ◽  
Neutron Cross Section ◽  
Total Neutron ◽  
Total Neutron Cross Section
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