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Title: Fundamentals of Natural Gas and Species Flows from Hydrate Dissociation-Applications to Safety and Sea Floor Instability

Abstract

Natural gas production from the dissociation of methane hydrate in a confined reservoir by a depressurizing down-hole well was studied. The case that the well pressure was kept constant was treated and two different linearization schemes in an axisymmetric configuration were used in the analysis. For different fixed well pressures and reservoir temperatures, approximate self-similar solutions were obtained. Distributions of temperature, pressure and gas velocity field across the reservoir were evaluated. The distance of the decomposition front from the well and the natural gas production rate as functions of time were also computed. Time evolutions of the resulting profiles were presented in graphical forms and their differences with the constant well output results were studied. It was shown that the gas production rate was a sensitive function of well pressure and reservoir temperature. The sensitivity of the results to the linearization scheme used was also studied.

Authors:
Publication Date:
Research Org.:
Clarkson Univ., Potsdam, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
878496
DOE Contract Number:  
FC26-00NT40916
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; CONFIGURATION; DISSOCIATION; GAS HYDRATES; HYDRATES; INSTABILITY; NATURAL GAS; PRODUCTION; PROGRESS REPORT; RESERVOIR TEMPERATURE; SAFETY; SEAS; SENSITIVITY; VELOCITY; WELL PRESSURE

Citation Formats

Ahmadi, Goodarz. Fundamentals of Natural Gas and Species Flows from Hydrate Dissociation-Applications to Safety and Sea Floor Instability. United States: N. p., 2005. Web. doi:10.2172/878496.
Ahmadi, Goodarz. Fundamentals of Natural Gas and Species Flows from Hydrate Dissociation-Applications to Safety and Sea Floor Instability. United States. https://doi.org/10.2172/878496
Ahmadi, Goodarz. 2005. "Fundamentals of Natural Gas and Species Flows from Hydrate Dissociation-Applications to Safety and Sea Floor Instability". United States. https://doi.org/10.2172/878496. https://www.osti.gov/servlets/purl/878496.
@article{osti_878496,
title = {Fundamentals of Natural Gas and Species Flows from Hydrate Dissociation-Applications to Safety and Sea Floor Instability},
author = {Ahmadi, Goodarz},
abstractNote = {Natural gas production from the dissociation of methane hydrate in a confined reservoir by a depressurizing down-hole well was studied. The case that the well pressure was kept constant was treated and two different linearization schemes in an axisymmetric configuration were used in the analysis. For different fixed well pressures and reservoir temperatures, approximate self-similar solutions were obtained. Distributions of temperature, pressure and gas velocity field across the reservoir were evaluated. The distance of the decomposition front from the well and the natural gas production rate as functions of time were also computed. Time evolutions of the resulting profiles were presented in graphical forms and their differences with the constant well output results were studied. It was shown that the gas production rate was a sensitive function of well pressure and reservoir temperature. The sensitivity of the results to the linearization scheme used was also studied.},
doi = {10.2172/878496},
url = {https://www.osti.gov/biblio/878496}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2005},
month = {Thu Sep 01 00:00:00 EDT 2005}
}