Geothermal resources in the imperial valley of california

1973 ◽  
Vol 37 (3) ◽  
pp. 461-462
Author(s):  
R. W. Rex
Keyword(s):  
Imperial Valley ◽  
Geothermal Resources

Interpretation of multicomponent seismic data across Wister geothermal field, Imperial Valley, California

2014 ◽  
Vol 2 (2) ◽  
pp. SE125-SE135 ◽  
Author(s):  
Shuijian Wei ◽  
Michael V. DeAngelo ◽  
Bob A. Hardage
Keyword(s):  
Seismic Data ◽  
San Andreas Fault ◽  
Geothermal Field ◽  
Seismic Survey ◽  
Fault System ◽  
Imperial Valley ◽  
Geothermal Resources ◽  
San Andreas ◽  
Multicomponent Seismic ◽  
San Andreas Fault System

Multicomponent seismic technology has been implemented across Wister geothermal field in southern California to evaluate the potential for further development of geothermal resources. The seismic survey was positioned atop the San Andreas fault system that extends southward from the Salton Sea. An interpretation of Wister Field geology was made using both P-P and P-SV seismic data. Two formation horizons, Canebrake/Olla/Diablo and Deguynos, were interpreted. Seismic time-structure maps were generated for each horizon. The objective of the study was to determine whether productive geothermal resources could be detected and mapped more reliably with multicomponent seismic data than with single-component P-P data. Complex faults associated with the regional San Andreas Fault system were interpreted across the [Formula: see text] 3D image space. The structural maps created are thought to be some of the most accurate depictions of subsurface structure publicly available in this area of the Imperial Valley. Particular attention was given to documenting faults that cut across deep strata. Both P-P and P-SV seismic showed evidence of such deep faults. Rock properties were analyzed from well logs. Log data showed that clastic rocks at this site exhibited measurable differences in [Formula: see text] velocity ratios for different rock types. Specifically, sand-prone intervals were associated with relatively low [Formula: see text] velocity ratios, and shale-dominated intervals had higher [Formula: see text] ratios. Using this rock physics behavior, [Formula: see text] values derived from seismic traveltime thicknesses were useful for recognizing lithological distributions and identifying favorable reservoir facies. Seismic data across Wister Field, like seismic data across many geothermal fields, have a low signal-to-noise character. We demonstrate that a unified and integrated interpretation of P and S data, even when seismic data quality is not as good as interpreters wish, can still yield valuable information for resource exploitation.

Performance Characteristics of the Lysholm Engine as Tested for Geothermal Power Applications in the Imperial Valley

1982 ◽  
Vol 104 (1) ◽  
pp. 231-240 ◽  
Author(s):  
R. F. Steidel ◽  
H. Weiss ◽  
J. E. Flower
Keyword(s):  
Lawrence Livermore National Laboratory ◽  
National Laboratory ◽  
Energy Output ◽  
Working Fluid ◽  
Two Phase ◽  
Imperial Valley ◽  
Geothermal Resources ◽  
Geothermal Fluids ◽  
Phase Mixture ◽  
Vapor Fraction

This is a description of the performance tests of a Lysholm engine completed at the Lawrence Livermore National Laboratory at the University of California. The Lysholm engine is a rotary displacement engine which can accept a low quality (vapor fraction) two-phase mixture. Generally, the well-head condition of geothermal fluids is a mixture of liquid and vapor, with quality up to 40 percent, although for most liquid dominated geothermal resources the vapor fraction is considerably less than 40 percent. As a thermodynamic process, using mixed phase flow has the potential for using significantly more of the available energy output per pound of fluid, as contrasted with other processes that either transfer heat energy to a second fluid, or use only the vapor fraction and discard the liquid. In our tests, the quality was varied between 8 and 27 percent. Our results indicate that the Lysholm engine can operate well with a two-phase mixture as a working fluid. The maximum observed engine efficiency was 53 percent at 8000 rpm, with an inlet pressure of 190.6 psia, 22.2 percent quality, and an exhaust pressure of 30.6 psia. The best results were observed at the higher speeds and with exhaust to an above-atmospheric backpressure.

GEOTHERMAL GROUND‐NOISE SURVEYS

Geophysics ◽  
1972 ◽  
Vol 37 (5) ◽  
pp. 813-824 ◽  
Author(s):  
E. J. Douze ◽  
G. G. Sorrells
Keyword(s):  
Heat Flow ◽  
High Surface ◽  
Noise Levels ◽  
Imperial Valley ◽  
Geothermal Resources ◽  
Field Surveys ◽  
Short Period ◽  
Gravity Measurements ◽  
Ground Noise

In recent years there has been increasing interest in the role of geothermal steam as a source of energy. Only recently has geophysical exploration begun to play a major role in the exploration for geothermal resources; heat flow, gravity, and resistivity measurements have been the techniques most used. One recent development is the discovery that high surface‐noise levels are associated with the presence of geothermal reservoirs below the surface. Field surveys using short‐period seismographs have been conducted in the Imperial Valley of California in areas where heatflow measurements or drilling have indicated the presence of a geothermal deposit. In all three surveys abnormally high noise levels were found above the reservoir in the frequency range of 0.5 to 5.0 hz. The ground‐noise anomalies show a more complex pattern than the associated heat flow and gravity measurements. A theoretical model has been developed in which small, random pressure variations in a convecting geothermal reservoir are suggested as the source of the noise. Using this model, the noise level above one of the anomalies was duplicated, using a reasonably sized reservoir with pressure variations of less than 1 millibar.

scholarly journals Power produced from hot dry rock geothermal resources: a case study for the Imperial Valley, California

1979 ◽  
Author(s):  
R.G. Cummings ◽  
G.E. Morris ◽  
C.J. Arundale ◽  
E.L. Erickson
Keyword(s):  
Imperial Valley ◽  
Geothermal Resources ◽  
Hot Dry Rock

Ramón “Chunky” Sánchez—¡PRESENTE!

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Russell C. Rodríguez
Keyword(s):  
San Diego ◽  
Culture Clash ◽  
Imperial Valley

On November 5, 2016, hundreds of people convened at the historical landmark of Chicano Park in Barrio Logan, San Diego, to celebrate the life of one of the community’s most revered elders, Ramón “Chunky” Moroyoqui Sánchez. Nuestro querido maestro falleció el día 28 de octubre de 2016. Sánchez, endearingly known as Chunky, was synonymous with Barrio Logan, Chicano Park, Chicano/a music, and San Diego in general. In this city, an auditorium is named in his honor. His image is incorporated in murals. The Chicano comedy troupe Culture Clash developed a vignette about Chunky, and upon his passing the San Diego Chargers’ website featured him in a blog post that included a photo of him with players and cheerleaders. Chunky was also well known beyond the Imperial Valley. The music of Los Alacranes Mojados (the group he started with his brother, Ricardo Sánchez) continues to be embraced in Mexicano/a and Chicano/a communities throughout California and the Southwest. The news of Sánchez’s passing reverberated throughout California like the violent ripples of a pond into which a boulder has been dropped. Ese vato will be missed.

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