Evaluation of the Gas Production Potential of Some Particularly Challenging Types of Oceanic Hydrate Deposits

We use the TOUGH+HYDRATE code to assess the production potential of some particularly challenging hydrate deposits, i.e., deposits that are characterized by any combination of the following factors: absence of confining boundaries, high thermodynamic stability, low temperatures, low formation permeability. Using high-resolution grids, we show that a new horizontal well design using thermal stimulation coupled with mild depressurization yields production rates that appear modest and insufficient for commercially viable production levels. The use of parallel horizontal wells (with the lower one providing thermal stimulation through heat addition, direct injection or circulation of warm water, and the upper one producing under a mild depressurization regime) offers tantalizing possibilities, and has the potential of allowing commercial production from a very large number of hydrate deposits that are not currently considered as production candidates if the problem of the corresponding large water production can be solved.

[1]  Roger M. Butler,et al.  Steam-Assisted Gravity Drainage: Concept, Development, Performance And Future , 1994 .

[2]  George J. Moridis,et al.  Challenges, uncertainties and issues facing gas production from gas hydrate deposits , 2010 .

[3]  Van Genuchten,et al.  A closed-form equation for predicting the hydraulic conductivity of unsaturated soils , 1980 .

[4]  M. Reagan,et al.  Occurrence of gas hydrate in Oligocene Frio sand: Alaminos Canyon Block 818: Northern Gulf of Mexico , 2009 .

[5]  George J. Moridis,et al.  Gas Production From Oceanic Class 2 Hydrate Accumulations , 2007 .

[6]  George J. Moridis,et al.  Evaluation of alternative horizontal well designs for gas production from hydrate deposits in the Shenhu area, South China Sea , 2010 .

[7]  Keni Zhang,et al.  SS - Gas Hydrate: Numerical Investigation of Gas Production Strategy for the Hydrate Deposits in the Shenhu Area , 2010 .

[8]  Mark D. White,et al.  Numerical Simulation of Methane Hydrate Production from Geologic Formations via Carbon Dioxide Injection , 2008 .

[9]  Gang Li,et al.  The use of dual horizontal wells in gas production from hydrate accumulations , 2013 .

[10]  George J. Moridis,et al.  Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential , 2008 .

[11]  E. D. Sloan,et al.  Challenges, Uncertainties and Issues Facing Gas Production from Hydrate Deposits in Geologic Systems , 2010 .

[12]  M. Reagan,et al.  Strategies for gas production from oceanic Class 3 hydrate accumulations , 2007 .

[13]  Carolyn A. Koh,et al.  Clathrate hydrates of natural gases , 1990 .

[14]  Jonny Rutqvist,et al.  Numerical Studies on the Geomechanical Stability of Hydrate-Bearing Sediments , 2009 .

[15]  Jeffery B. Klauda,et al.  Global Distribution of Methane Hydrate in Ocean Sediment , 2005 .

[16]  Jinqiang Liang,et al.  Gas Hydrate System of Shenhu Area, Northern South China Sea:Wire-line Logging, Geochemical Results and Preliminary Resources Estimates , 2010 .

[17]  George J. Moridis,et al.  A Domain Decomposition Approach for Large-Scale Simulations of Flow Processes in Hydrate-Bearing Geologic Media , 2008 .

[18]  George J. Moridis,et al.  Gas Production from Unconfined Class 2 Hydrate Accumulations in the Oceanic Subsurface , 2005 .

[19]  A. Milkov.  Global estimates of hydrate-bound gas in marine sediments: how much is really out there? , 2004 .

[20]  Matthew T. Reagan,et al.  Sensitivity Analysis of Gas Production from Class 2 and Class 3 Hydrate Deposits , 2008 .

[21]  K. Kvenvolden.  Methane hydrate — A major reservoir of carbon in the shallow geosphere? , 1988 .

[22]  M. Kowalsky,et al.  TOUGH+Hydrate v1.0 User's Manual: A Code for the Simulation of System Behavior in Hydrate-Bearing Geologic Media , 2008 .

[23]  George J. Moridis,et al.  Comparison of kinetic and equilibrium reaction models in simulating gas hydrate behavior in porous media , 2006 .

[24]  I︠u︡. F. Makogon.  Hydrates of Hydrocarbons , 1997 .

[25]  George J. Moridis,et al.  The use of huff and puff method in a single horizontal well in gas production from marine gas hydrate deposits in the Shenhu Area of South China Sea , 2010 .

[26]  George J. Moridis,et al.  Numerical Studies of Gas Production From Methane Hydrates , 2003 .

[27]  H. Narita,et al.  Prediction of Gas Productivity From Eastern Nankai Trough Methane-Hydrate Reservoirs , 2009 .

[28]  Roger M. Butler,et al.  Some Recent Developments in SAGD , 2001 .

[29]  Bjørn Kvamme,et al.  MRI Visualization of Spontaneous Methane Production From Hydrates in Sandstone Core Plugs When Exposed to CO2 , 2008 .