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U. S. Geological Survey Digital Data Series 67 

Geologic Studies of Deep Natural Gas Resources 

Edited by Thaddeus S. Dyman and Vello A. Kuuskraa1 

Version 1.0 First replication 2001 
ISBN: 0-607-95407-8 
Copies are available from: 
USGS Information Services 
Box 25286, Federal Center 
Denver, CO 80225 

Call: (303) 202-4200 
For more information on Deep Natural Gas Resources contact: 
Ted Dyman
phone: (303) 236-5730 
Box 25046, 
Denver Federal Center, MS 939 
Denver, CO 80225-0046 

The files in DDS-67 are in PDF format requiring Adobe Acrobat Reader or similar software, and are accessible as defined by Section 508
If you do not already have Acrobat Reader version 4.0 or later, you may download the latest version here

Volume Contents
Chapter A.  Volume Contents, Introduction, References
By Thaddeus S. Dyman and Vello A. Kuuskraa 

CONTENTS: Chapter B. Summary of Deep Oil and Gas Wells in the United States Through 1998 
By Thaddeus S. Dyman and Troy A. Cook 

CONTENTS: Chapter C. Geology and Natural Gas Potential of Deep Sedimentary Basins in the Former Soviet Union 
By Thaddeus S. Dyman, Vadim A. Litinsky, and Gregory F. Ulmishek 

CONTENTS: Chapter D. Comparison of Kinetic-model Predictions of Deep Gas Generation 
By Allison A. Henry and Michael D. Lewan 

CONTENTS: Chapter E. Gas: Oil Ratios for Source Rocks Containing Type-I, -II, -IIS, and -III Kerogens as Determined by Hydrous Pyrolysis 
By Michael D. Lewan and Allison A. Henry 

CONTENTS: Chapter F. Probabilistic Method for Subdividing Petroleum Resources into Depth Slices 
By Robert A. Crovelli 

CONTENTS: Chapter G. Relative Uncertainty of Conventional Natural Gas Plays in the Gulf Coast Region 
By Thaddeus S. Dyman, James W. Schmoker, and Christopher J. Schenk 

CONTENTS: Chapter H. A Possible Deep-Basin High-Rank Gas Machine Via Water Organic-Matter Redox Reactions 
By By Leigh C. Price 

 In 1997, the U. S. Geological Survey published USGS Bulletin 2146, comprising 12 chapters dealing with geologic, geochemical, and assessment issues related to deep gas resources (Dyman and others, 1997). A primary goal of that report was to provide geology-based information that might aid in future improvements to technology for deep gas exploration and development. Chapters of this report  represent a continuation of that work. The current work is funded by the U. S. Department of Energy, National Energy Technology Laboratory, Morgantown, W. Va. (contract No. DE-AT26-98FT40032),  Gas Technology Institute (GTI), Chicago, Ill. (contract No. 5094-210-3366 through a Cooperative Research and Development Agreement with Advanced Resources International, Arlington, Va.), and  the U. S. Geological Survey, Denver, Colo.

Chapters in the present report summarize major conclusions of this ongoing work. 

Chapter A,  Introduction, Acknowledgements, and References. 

Chapters B and C address the areal extent of drilling and the distribution of deep basins: Chapter B provides an update of deep drilling in the U. S. during the 1990's, and Chapter C summarizes the  distribution of deep sedimentary basins and the potential for deep gas in the Former Soviet Union. 

Chapters D and E are geochemical papers addressing source-rock issues and deep gas generation. Chapter D presents gas generation kinetic models based on laboratory pyrolysis methods and examines them for hypothetical basin scenarios based on end-member heating rates of 1 o and 10 o C/ m. y. Chapter E presents gas: oil ratios (GOR) from hydrous-pyrolysis experiments conducted on immature source rocks and summarizes how they are affected by kerogen type. The quantity of expelled oil and the gas generated during hydrous pyrolysis allows for the calculation of GOR's for a particular source rock at hydrous-pyrolysis temperatures representing different stages of oil generation. 

Chapters F and G discuss assessment issues related to deep gas. In Chapter F, a probabilistic method is developed for subdividing gas resources into depth slices. This is important for deep natural gas assessments because gas plays often range across many depth intervals, and estimating the amount of gas in each interval aids in both geologic and economic analysis of the play and province. In Chapter G, the relative uncertainty of estimates of deep gas in plays in the Gulf Coast region is analyzed. More than 60 plays in the Western Gulf and Louisiana-Mississippi Salt Basins provinces are compared and analyzed for their conditional uncertainty. 

Chapter H evaluates the mechanism of hydrogenation of deep, high-rank spent kerogen by water, with subsequent generation of methane-rich HC gas. The editors note with regret the untimely death, in  August 2000, of organic geochemist Leigh C. Price, the author of Chapter H. 

Disclaimer for the CD-ROM set, DDS-67
The Compact Disc-Read Only Memory (CD-ROM) publication was prepared 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, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. 
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