LLL in situ coal gasification program. Quarterly progress report, July--September 1977

Technical Report · Tue Nov 01 04:00:00 EST 1977

OSTI ID:5232366

Olness, D U; Madsen, S K ^[1]

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1. eds.

Detailed plans were completed for Hoe Creek Experiment No. 2 to test the linked vertical well process in a wet, homogeneous coal seam. We plan to carry out a reverse burn followed by a forward burn in such a manner that results can be compared directly to those obtained at the Laramie Energy Research Center site in Hanna, Wyoming. We also plan a short steam/oxygen injection test during the gasification. We developed the computer system that will be used during Hoe Creek Experiment No. 2. We have prepared the operational logic and software based on a Hewlett-Packard RTE III operating system. The computer system will store all of the incoming data on magnetic tapes and perform a variety of real-time data analysis and display tasks which will permit a continuous check on the gasification process. Hoe Creek Experiment No. 2 will be heavily instrumented. Thermocouples, pressure sensors, and gas sampling tubes have been emplaced in the various wells. Final plans have been completed for mapping the burn front and its progress using high frequency electromagnetic waves. We have analyzed numerical modeling results to evaluate the need for hardware improvements and to identify the best experimental strategy. Hydraulic tests were run to determine the permeability of the coal at the site and to ensure that all wells are hydraulically connected. Our modeling effort has been directed toward identifying and modeling the physico-chemical processes occurring in underground coal gasification. In current efforts, we use the open cavity model and consider such processes as oxygen flow and depletion, heat flow, water flow and vaporization, and product-gas reactions. Measurements made in Hoe Creek Experiment No. 2 should provide valuable input for the modeling effort. Laboratory work in progress at LLL is expected to provide useful data for the modeling effort and should also provide general information needed to improve our understanding of the underground coal gasification process.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5232366
• Report Number(s): UCRL-50026-77-3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
BOREHOLE LINKING
CHEMICAL REACTIONS
COAL GASIFICATION
COMBUSTION
COMPUTER CALCULATIONS
DATA ACQUISITION SYSTEMS
EXPLOSIVE FRACTURING
FRACTURING
GASIFICATION
IN-SITU GASIFICATION
IN-SITU PROCESSING
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
OXIDATION
PLANNING
PROCESSING
REVERSE COMBUSTION