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Update on the Long-Term Flow Testing Program

Description: Preliminary flow and pressure testing of the Phase II Hot Dry Rock (HDR) reservoir at Fenton Hill, New Mexico, as part of the preparations for the initial 90-day segment of the Long-Term Flow Test, has revealed several significant features concerning the hydraulic behavior of this reservoir as a function of injection and production pressure levels. Of most significance to the future operation of HDR power plants is the influence of elevated production backpressure on the effective reservoir flo… more
Date: January 1, 1992
Creator: Brown, D. W.
Partner: UNT Libraries Government Documents Department
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Analysis of well test data---Application of probabilistic models to infer hydraulic properties of fractures. [Contains list of standardized terminology or nomenclatue used in statistical models]

Description: Statistical and probabilistic methods for estimating the probability that a fracture is nonconductive (or equivalently, the conductive-fracture frequency) and the distribution of the transmissivities of conductive fractures from transmissivity measurements made in single-hole injection (well) tests were developed. These methods were applied to a database consisting of over 1,000 measurements made in nearly 25 km of borehole at five sites in Sweden. The depths of the measurements ranged from nea… more
Date: September 27, 1991
Creator: Osnes, J. D. (RE/SPEC, Inc., Rapid City, SD (United States)); Winberg, A.; Andersson, J. E. & Larsson, N. A. (Sveriges Geologiska AB, Goeteborg (Sweden))
Partner: UNT Libraries Government Documents Department
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Microbial field pilot study

Description: The objective of this project is to perform a microbially enhanced oil recovery field pilot test in the Southeast Vassar Vertz Sand Unit in Payne County, Oklahoma. Indigenous, anaerobic, nitrate-reducing bacteria will be stimulated to selectively plug flow paths which have been preferentially swept by a prior waterflood. This will force future flood water to invade bypassed regions of the reservoir and increase sweep efficiency. 1 fig., 2 tabs.
Date: January 1, 1991
Creator: Knapp, R.M.; McInerney, M.J. & Menzie, D.E.
Partner: UNT Libraries Government Documents Department
open access

Microbial field pilot study

Description: The objective of this project is to perform a microbially enhanced oil recovery field pilot test in the Southeast Vassar Vertz Sand Unit (SEVVSU) in Payne County, Oklahoma. Indigenous, anaerobic, nitrate-reducing bacteria will be stimulated to selectively plug flow paths which have been preferentially swept by a prior waterflood. This will force future flood water to invade bypassed regions or the reservoir and increase sweep efficiency. Injection of nutrient stimulates the growth and metabolis… more
Date: January 1, 1991
Creator: Knapp, R.M.; McInerney, M.J. & Menzie, D.E.
Partner: UNT Libraries Government Documents Department
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Characterizing hydraulically fractured reservoirs using induced microearthquakes

Description: Hydraulic fracturing is a common method employed to increase the production of oil and gas fields. Recently, there has been increased interest in monitoring the microearthquakes induced by hydraulic fracturing as a means of obtaining data to characterize reservoir changeS induced by the injection. Two types of microearthquakes have been observed during hydraulic fracturing. Tensile events have been observed and modeled as the parting of the surfaces of a fracture. A majority of the events obser… more
Date: January 1, 1991
Creator: Fehler, M.
Partner: UNT Libraries Government Documents Department
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Development of Alaskan Gas Hydrate Resources

Description: The research undertaken in this project pertains to study of various techniques for production of natural gas from Alaskan gas hydrates such as, depressurization, injection of hot water, steam, brine, methanol and ethylene glycol solutions through experimental investigation of decomposition characteristics of hydrate cores. An experimental study has been conducted to measure the effective gas permeability changes as hydrates form in the sandpack and the results have been used to determine the r… more
Date: June 1, 1991
Creator: Kamath, V. A.; Sharma, G. D. & Patil, S. L.
Partner: UNT Libraries Government Documents Department
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Identification of environmental RD D needs

Description: The objective of this project was to identify needs for environmental research development and demonstration projects that have the potential to improve the performance of oil and gas exploration, drilling, and production technologies for maximum recovery of domestic petroleum resources under optimal environmental and economic conditions. To achieve this objective several areas of work were addressed. The first task was to compile as much related data as possible. This was achieved by literatur… more
Date: September 1, 1991
Creator: Crocker, M. E.; Madden, M. P. & Porter, R.
Partner: UNT Libraries Government Documents Department
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Results of Phase 1 postburn drilling and coring, Rocky Mountain 1 Underground Coal Gasification Site, Hanna Basin, Wyoming

Description: The Rocky Mountain 1 (RM1) Underground Coal Gasification (UCG) test consisted of two different module configurations: the controlled retracting injection point (CRIP) and elongated linked well (ELW) configurations. The postburn coring of the RM1 UCG site was designed in two phases to fulfill seven objectives outlined in the Western Research Institute's (WRI) annual project plan for 1988--1989. The seven objectives were to (1) delineate the areal extent of the cavities, (2) identify the extent o… more
Date: September 1, 1990
Creator: Lindblom, S. R.; Covell, J. R. & Oliver, R. L.
Partner: UNT Libraries Government Documents Department
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Modification of chemical and physical factors in steamflood to increase heavy oil recovery

Description: This report covers work performed in the area related to the physicochemical factors for the improvement of the oil recovery efficiency in steamfloods. In this context, three general areas are studied: (1) The understanding of vapor-liquid flow in porous media, whether the flow is internal (boiling), external (steam injection) or countercurrent (as in vertical heat pipes). (2) The effect of reservoir heterogeneity, particularly as it regards fractured systems and long and narrow reservoirs (whi… more
Date: April 1, 1992
Creator: Yortsos, Y.C.
Partner: UNT Libraries Government Documents Department
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Field demonstration of in-situ air stripping using horizontal wells

Description: Under sponsorship from the US Department of Energy, technical personnel from the Savannah River Laboratory and other DOE laboratories, universities and private industry have completed a full scale demonstration of environmental remediation using horizontal wells. The 139 day long test was designed to remove volatile chlorinated solvents from the subsurface using two horizontal wells. One well, approximately 90m long and 45m deep drilled below a contaminant plume in the groundwater, was used to … more
Date: January 1, 1991
Creator: Looney, B. B. & Kaback, D. S.
Partner: UNT Libraries Government Documents Department
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Moving HDR technology toward commercialization

Description: Conventional geothermal resources are currently being developed in many parts of the world where naturally occurring steam or hot water can be extracted from the earth. These hydrothermal resources, however, provide access to only a small fraction of the energy contained within the crust of the earth. In most regions, the heat of the earth is contained in hot rock at depth. The total amount of energy available in the form of hot dry rock (HDR) is extremely large. Estimates place the magnitude o… more
Date: January 1, 1991
Creator: Duchane, D.
Partner: UNT Libraries Government Documents Department
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Recent progress in HDR reservoir engineering

Description: In the past two years, three very significant advances have been made in our understanding of the behavior and properties of Hot Dry Rock (HDR) geothermal reservoirs. First, we have determined that the rate of water loss from such deep, engineered reservoirs -- previously thought to be a major problem -- is minimal in the absence of reservoir growth, even under considerably elevated operating pressures. Second, a new method has been developed for determining the volume of hot fractured rock acc… more
Date: January 1, 1991
Creator: Brown, D. W.
Partner: UNT Libraries Government Documents Department
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Alkaline flooding injection strategy

Description: The objective of this project is to improved alkali-surfactant flooding methods, and this includes determining the proper design of injection strategy. Several different injection strategies have been used or suggested for recovering heavy oils with surfactant-enhanced alkaline flooding methods. Oil recovery was compared for four different injection strategies: (1) surfactant followed by polymer, (2) surfactant followed by alkaline polymer, (3) alkaline surfactant followed by polymer, and (4) a… more
Date: March 1, 1992
Creator: French, T. R. & Josephson, C. B.
Partner: UNT Libraries Government Documents Department
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(National Institute for Petroleum and Energy Research) quarterly technical report, July 1--September 30, 1991

Description: The report is submitted in two volumes, Volume I representing the work accomplished under Fuels Research and Volume II the work for Energy Production Research during the period July 1--Sept. 30, 1991. Topics covered include: chemical flooding, gas displacement, thermal recovery, geoscience technology, resource assessment technology, microbial technology, environmental technology.
Date: January 1, 1992
Partner: UNT Libraries Government Documents Department
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Hot dry rock heat mining: An alternative energy progress report

Description: Mining Heat from the hot dry rock (HDR) resource that lies beneath the earth's crust may provide an almost inexhaustible supply of energy for mankind with minimal environmental effects. In the heat mining process, water is pumped down an injection well into a mass of hydraulically fractured hot rock. As the water flows under high pressure through the opened rock joints, it becomes heated by the rock. It is returned to the surface through a production well (or wells) located some distance from t… more
Date: January 1, 1991
Creator: Duchane, D. V.
Partner: UNT Libraries Government Documents Department
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Numerical modeling of injection experiments at The Geysers

Description: Data from injection experiments in the southeast Geysers are presented that show strong interference (both negative and positive) with a neighboring production well. Conceptual and numerical models are developed that explain the negative interference (decline of production rate) in terms of heat transfer limitations and water-vapor relative permeability effects. Recovery and over-recovery following injection shut-in are attributed to boiling of injected fluid, with heat of vaporization provided… more
Date: January 1, 1993
Creator: Pruess, K. (Lawrence Berkeley Lab., CA (United States)) & Enedy, S. (Northern California Power Agency, Middletown, CA (United States))
Partner: UNT Libraries Government Documents Department
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The design and construction of a hot dry rock pilot plant

Description: The geothermal energy program at the Los Alamos National Laboratory is directed toward demonstrating the potential of the hot dry rock (HDR) technology as an alternate energy source. Since the inception of the program, scientists and engineers have perfected drilling and fracturing techniques to create underground reservoirs for the purpose of tapping the potential heat energy from the hot rock in the earth. One of the achievements to date has been the creation of a reservoir at the Laboratory'… more
Date: January 1, 1991
Creator: Ponden, R.F.
Partner: UNT Libraries Government Documents Department
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The feasibility of recovering medium to heavy oil using geopressured- geothermal fluids

Description: The feasibility, economics and environmental concerns of producing more domestic oil using thermal enhanced oil recovery (TEOR) are reviewed and the unique nature of geopressured-geothermal (GPGT) fluids for thermal recovery are outlined. Current methods of TEOR are briefly discussed and it is noted that these methods are presently under scrutiny by both federal and state air quality agencies; and moreover, they often involve costly operational and mechanical problems associated with heating wa… more
Date: September 1, 1991
Creator: Negus-de Wys, J.; Kimmell, C.E.; Hart, G.F. & Plum, M.M.
Partner: UNT Libraries Government Documents Department
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Iron dynamics during injection of dissolved organic carbon into a sandy aquifer

Description: The dynamics of dissolved, colloidal, and solid-phase iron were examined during a forced-gradient field experiment in Georgetown, South Carolina, in the summer of 1990. The experiment involved injection of 80,000 L of oxygenated water containing high levels of dissolved organic carbon (66 mg/L DOC) into a sandy aquifer. Iron dynamics were followed for 2 weeks in three saturated horizons at sampling wells located 1.5 (A wells) and 3 m (B wells) from the injection well. The initial oxidation/redu… more
Date: January 1, 1991
Creator: Liang, Liyuan; McCarthy, J.F. (Oak Ridge National Lab., TN (USA)) & Williams, T.M. (Clemson Univ., Georgetown, SC (USA). Belle W. Baruch Forest Science Inst.)
Partner: UNT Libraries Government Documents Department
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Visualization experiments on steam injection in Hele-Shaw cells

Description: Flow visualization experiments have been successfully employed in reservoir engineering research for many years. They involve 2-D geometries in transparent Hele-Shaw cells and glass micromodels. Although much work has been done on immiscible flows (drainage or imbibition), visualization of steamfloods, which constitute a major part of current EOR methods, has not been attempted to data. In this paper, we present experimental results on steam injection in a transparent, pyrex glass Hele-Shaw cel… more
Date: March 1, 1992
Creator: Kong, Xianli; Haghighi, M. & Yortsos, Y.C.
Partner: UNT Libraries Government Documents Department
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Initial evaluation of fracturing oil shale with propellants for in situ retorting, Phase 2

Description: A series of field experiments was carried out to gather preliminary information on the use of propellant charges to create horizontal fractures in oil shale beds for in situ retorting. Development of a propellant tool specifically designed to create horizontal fractures, and testing of various sizes and designs of the tool to create fractures in oil shale beds were carried out simultaneously. Ten prototype tools with energy yields from 2 pounds to 60 pounds were fired at depths ranging from 10 … more
Date: May 1, 1991
Creator: Lekas, M. A.; Lekas, J. M. & Strickland, F. G.
Partner: UNT Libraries Government Documents Department
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Geothermal Research and Development Program

Description: Results are reported on adsorption of water vapor on reservoir rocks, physics of injection of water into vapor-dominated geothermal reservoirs, earth-tide effects on downhole pressures, injection optimization at the Geysers, effects of salinity in adsorption experiments, interpreting multiwell pressure data from Ohaaki, and estimation of adsorption parameters from transient experiments.
Date: January 25, 1993
Partner: UNT Libraries Government Documents Department
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Modeling the hydraulic characteristics of the Fenton Hill, New Mexico Hot Dry Rock reservoir

Description: A conceptual model is developed for fluid flow in the Fenton Hill, New Mexico Hot Dry Rock (HDR) geothermal reservoir. The model consists of discrete fractures whose apertures, and hence permeabilities, are strong functions of pressure. Fluid storage occurs within the main fracture system and in the surrounding country rock. Using a fracture network simulator, the reservoir model has been calibrated using reservoir test data obtained at a variety of pressures and flow rates with the system unde… more
Date: January 1, 1990
Creator: Robinson, B. A. & Brown, D. W.
Partner: UNT Libraries Government Documents Department
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Summary report: Assessment of deep injection well associated surface soils at the Idaho National Engineering Laboratory

Description: This report summarizes sampling activities and analytical results of the chemical and radiological content of surface soils from storm water retention basins and drainage ditches associated with eight deep injection wells at the Idaho National Engineering Laboratory. The results of the sampling effort were intended to support permitting of the injection wells by the State of Idaho Department of Water Resources. In August 1992, the surface soils associated with eight storm water retention basins… more
Date: January 1, 1993
Creator: Pole, S.B.
Partner: UNT Libraries Government Documents Department
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