scholarly journals Use of slim holes for geothermal exploration and reservoir assessment: A preliminary report on Japanese experience

1993 ◽  
Author(s):  
S.K. Garg ◽  
J. Combs
Keyword(s):  
Preliminary Report ◽  
Geothermal Exploration ◽  
Japanese Experience ◽  
Reservoir Assessment

The Radial Movement of Permeability Fronts and Multiple Reaction Zones in Porous Media (includes associated papers 11284 and 11590 )

1982 ◽  
Vol 22 (01) ◽  
pp. 99-107 ◽  
Author(s):  
Yusuf Hekim ◽  
H. Scott Fogler ◽  
Conwell C. McCune
Keyword(s):  
High Temperature ◽  
Basin And Range ◽  
Well Logs ◽  
Well Log ◽  
Geothermal Resource ◽  
Basin And Range Province ◽  
Geothermal Exploration ◽  
Geophysical Well Logs ◽  
Log Interpretation ◽  
Reservoir Assessment

Review of Well Logging in the Basin and Range Known Geothermal Resource Areas Summary This paper discusses applications and interpretations of well logs to Basin and Range Province geothermal exploration and development. Problems experienced in use of conventional oilfield tools and techniques are reviewed, and methods to circumvent these problems are illustrated. Particular examples focus on log responses and matrix effects in complex lithologies. Introduction In 1977, the U.S. DOE's Div. of Geothermal Energy (DGE) initiated the "industry coupled program" to accelerate development of high-temperature geothermal resources. There are two key aspects of the program:cost sharing with industry for exploration, reservoir assessment, and reservoir confirmation, andthe release of geologic, geophysical, and geochemical data to improve knowledge and understanding of geothermal reservoirs. A third aspect of the program was to evaluate techniques and current methods on a cost-effective basis. Two regions of high industry interest and high geothermal potential were selected by DGE for procurements within the industry coupled program. The first request for proposals (RFP) resulted in six contracts for work in south central Utah, the second in 12 contracts for exploration and reservoir assessment work in the northern Basin and Range Province. The geothermal resource areas included in the program are shown in Fig. 1. The range of exploration activities of participating companies and data to be made public through this program are indicated in Table 1. Ward et al. studied these data and recommended a generalized exploration strategy for high-temperature geothermal systems in the Basin and Range Province. Fiore provided an overview and status report for the overall reservoir assessment program. The program's emphasis was direct drilltesting of the geothermal reservoir. At least one deep exploration well has been (or will be) drilled in each reservoir, at costs between $500,000 and $2,000,000. The high well costs demand prudent, systematic exploration before siting the well and as much geologic information as possible from each well test. Drill cuttings, geophysical well logs, temperature, pressure and flow test data, and complete well histories for each well drilled are transmitted to the U. of Utah Research Inst's. Earth Science Laboratory Div. (ESL). ESL reviews and approves the deliverables and makes data available to the public through established open-file procedures. Geophysical well logs are transmitted to Rocky Mountain Well Log Services (of Petroleum Information Corp.), where they are reproduced and distributed at nominal cost. In this manner detailed well data for 29 geothermal exploration wells and deep thermal gradient tests have been made public since 1977. The current status of drilling and the availability of well log data are listed in Table 2. Many thermal gradient holes with only mud and temperature logs are not included in Table 2. Note that DGE has instituted complementary and supporting programs designed to advance well log interpretation and high-temperature tool development. At ESL detailed well log/lithologic interpretations form an important part of several reservoir case histories and topical studies published or in preparation. These integrated interpretations are instrumental to the planning of subsequent well tests and to overall reservoir evaluation. We describe well log data that have been made available through the industry coupled program. Logging parameters used, data quality, previously published log interpretations, and some results of the ESL log interpretation work are reviewed and discussed. Well Logging in Geothermal Areas JPT P. 1104^

scholarly journals Slimhole well casing design for high-temperature geothermal exploration and reservoir assessment

2017 ◽  
Vol 34 (2) ◽  
pp. 465 ◽  
Author(s):  
Michał Kruszewski ◽  
Tomasz Śliwa ◽  
Sverrir Þórhallsson ◽  
Mohsen Assadi
Keyword(s):  
High Temperature ◽  
Geothermal Exploration ◽  
Reservoir Assessment

The National Geothermal Exploration Technology Program

Geophysics ◽  
1979 ◽  
Vol 44 (10) ◽  
pp. 1721-1737 ◽  
Author(s):  
L. Ball ◽  
J. W. Salisbury ◽  
P. R. Kintzinger ◽  
A. F. Veneruso ◽  
S. H. Ward
Keyword(s):  
System Modeling ◽  
Department Of Energy ◽  
Energy Utilization ◽  
Commercial Development ◽  
Thermal Methods ◽  
Geothermal Resources ◽  
Geothermal Exploration ◽  
Program Goal ◽  
Near Term ◽  
Reservoir Assessment

In response to the Geothermal Energy Research, Development, and Demonstration Act of 1974, a federal geothermal program has been established with the objective of stimulating the commercial development of geothermal resources. The program goal is to increase the annual rate of energy utilization from the present 0.04 quads (500 MWe) to 0.3–0.5 quads in the near term (about 1985), 4.0–9.0 quads in the mid‐term (1985–2000), and 16.0–28.0 quads in the long term (by about 2020). The realization of these goals depends upon the discovery and exploitation of many new geothermal resource areas. The Department of Energy program for geothermal exploration and assessment has been structured to address technological barriers presently hindering the economical discovery and delineation of geothermal resources. We describe the program elements—exploration technology, reservoir assessment, reservoir confirmation, and reservoir engineering—in light of the need to evaluate some 1500 new prospects in order to meet the federal midterm electric power goal of 20,000 MWe on‐line by the year 2000. We illustrate the program elements with suggested sequences for exploration, assessment, and confirmation of a 200-MWe resource in the eastern Basin and Range physiographic province. The estimated costs for these sequences are $385,000, $565,000, and $3,190,000, respectively. Deep drilling constitutes the major element in the confirmation costs. An economical exploration strategy requires use of cost‐effective techniques; thus, we have initiated a number of technology assessment studies. Pursuant to these studies, we present a summary of our initial findings and discuss the status and needs for topics such as system modeling, thermal methods, rock and fluid properties, seismic, and electrical methods. Accurate reservoir assessment requires new developments in logging instrumentation for high‐temperature, hostile environment boreholes and improved means for interpreting acquired data. The logging instrumentation program is aimed at upgrading logging systems for operation at 275°C and 48.3 MPa in the near term (1982) and 350°C and 138 MPa by 1986. Existing hardware is being upgraded, components and materials are being developed, and critically needed prototype tools for temperature, flow, and pressure measurements will be evaluated. A program addressing log interpretation problems uses industrial expertise to analyze specific shortcomings in our ability to infer critical reservoir parameters from acquired data. The program will also establish and maintain test and calibration wells and support research logging and petrophysical studies.

Progress report on 21-cm observations at low latitude between longitudes (l 11) 0° and 66°

1967 ◽  
Vol 31 ◽  
pp. 177-179
Author(s):  
W. W. Shane
Keyword(s):  
Preliminary Report ◽  
Progress Report ◽  
Galactic Centre ◽  
Low Latitude ◽  
The Third ◽  
Introductory Lecture ◽  
Centre Region

In the course of several 21-cm observing programmes being carried out by the Leiden Observatory with the 25-meter telescope at Dwingeloo, a fairly complete, though inhomogeneous, survey of the regionl11= 0° to 66° at low galactic latitudes is becoming available. The essential data on this survey are presented in Table 1. Oort (1967) has given a preliminary report on the first and third investigations. The third is discussed briefly by Kerr in his introductory lecture on the galactic centre region (Paper 42). Burton (1966) has published provisional results of the fifth investigation, and I have discussed the sixth in Paper 19. All of the observations listed in the table have been completed, but we plan to extend investigation 3 to a much finer grid of positions.

Preliminary Report of a Comparative Study of Seminiferous Tubular Epithelium from Rats Flown on Cosmos 1887 and SL3

1988 ◽  
Vol 46 ◽  
pp. 276-277
Author(s):  
Walter J. Sapp ◽  
D.E. Philpott ◽  
C.S. Williams ◽  
K. Kato ◽  
J. Stevenson ◽  
...  
Keyword(s):  
Space Flight ◽  
Physiological Response ◽  
Preliminary Report ◽  
Complete Recovery ◽  
Environmental Constraints ◽  
Tubular Epithelium ◽  
Testicular Weight ◽  
Testicular Morphology ◽  
Normal Offspring ◽  
Rats And Mice

Space flight, with its unique environmental constraints such as immobilization, decreased and increased pressures, and radiation, is known to affect testicular morphology and spermatogenesis. Selye, summarized the manifestations of physiological response to nonspecific stress and he pointed out that atrophy of the gonads always occurred. Reports of data collected from two dogs flown in space for 22 days (Cosmos 110) indicate that there was an increase of 30 to 70% atypical spermatozoa when compared to ground based controls. Seventy-five days after the flight the abnormalities had decreased to the high normal value of 30% and mating of these dogs after this period produced normal offspring, suggesting complete recovery. Effects of immobilization and increased gravity were investigated by spinning rats and mice at 2x g for 8-9 weeks. A decrease in testicular weight was noted in spun animals when compared to controls. Immobilization has been show to cause arrest of spermatogenesis in Macaca meminstrins.

Electron Probe Analysis of Vertebrate Smooth Muscle: Distribution of Ca and Ci

1976 ◽  
Vol 34 ◽  
pp. 334-335 ◽  
Author(s):  
Avril V. Somlyo ◽  
H. Shuman ◽  
A.P. Somlyo
Keyword(s):  
Smooth Muscle ◽  
Electron Probe ◽  
Preliminary Report ◽  
Cell Damage ◽  
Electron Probe Analysis ◽  
Perinuclear Space ◽  
Probe Analysis ◽  
High K ◽  
Low K ◽  
Initial Results

This is a preliminary report of electron probe analysis of rabbit portal-anterior mesenteric vein (PAMV) smooth muscle cryosectioned without fixation or cryoprotection. The instrumentation and method of electron probe quantitation used (1) and our initial results with cardiac (2) and skeletal (3) muscle have been presented elsewhere.In preparations depolarized with high K (K2SO4) solution, significant calcium peaks were detected over the sarcoplasmic reticulum (Fig 1 and 2) and the continuous perinuclear space. In some of the fibers there were also significant (up to 200 mM/kg dry wt) calcium peaks over the mitochondria. However, in smooth muscle that was not depolarized, high mitochondrial Ca was found in fibers that also contained elevated Na and low K (Fig 3). Therefore, the possibility that these Ca-loaded mitochondria are indicative of cell damage remains to be ruled out.

The Successful Stuttering Management Program: A Preliminary Report on Outcomes

2010 ◽  
Vol 20 (1) ◽  
pp. 20-25 ◽  
Author(s):  
Jim Tsiamtsiouris ◽  
Kim Krieger
Keyword(s):  
Preliminary Report ◽  
Speech Rate ◽  
Management Program ◽  
Intensive Program ◽  
Adults Who Stutter

Abstract The purpose of this study was to test the hypothesis that adults who stutter will exhibit significant improvements after attending a residential, 3-week intensive program that focuses on avoidance reduction and stuttering modification therapy. Preliminary analyses focused on four measures: (a) SSI-3, (b) speech rate, (c) S-24 Scale, and (d) OASES. Results indicated significant improvements on all of the measures.

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