Download or read book Subsurface Characterization for Evaluating Geothermal Resource Potential from Existing Oil and Gas Wells in Tuttle Oklahoma Preprint written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oil and gas (O&G) wells often encounter co-produced hot water, possibly suitable for geothermal direct-use applications. The City of Tuttle is located on the eastern part of the Anadarko sedimentary basin in Oklahoma with high heat-in-place potential and recovery capability at depth. This study aims at demonstrating the potential of geothermal energy production for direct-use applications in two public schools and 250 nearby houses in Tuttle via repurposing existing O&G wells. In this scope, geochemistry, geology, and borehole log data were collected and incorporated into a 3D conceptual subsurface model. A digital elevation model (DEM) was used to represent the study area topography with four O&G wells. In addition, hydrogeochemical characteristics of the geothermal fluid and scaling potential were analyzed using ternary diagrams and chemical ratios to develop mixing models. The subsurface geology model indicated that the study area primarily consists of Permian to Mississippian Sandstone and Limestone formations, implying a porosity ranging between 12% and 22%, and a permeability up to 3.90E-14 m2 in certain reservoir levels. The reservoir temperature is expected to be ranging between 80 degrees C to 95 degrees C around 3 km depth with an average temperature gradient of 22.8 degrees C/km. Chemical geothermometers also estimated the reservoir temperature as 90 degrees C. Findings of the chemical model demonstrated that the geothermal fluid is Sodium-Potassium-Chloride-Sulfate type and possibly mixed with shallow groundwater resulting in higher Ca and Mg concentrations and lower Na/K ratio implying lower calcite scaling. These results comprehensively characterize the potential of geothermal resources in the study area and imply that geothermal energy production by repurposing existing O&G wells is suitable for low-temperature direct-use applications.

Download or read book Seeing into the Earth written by National Research Council and published by National Academies Press. This book was released on 2000-04-26 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: Just below our feet is an environment that supports our infrastructure, yields water, provides for agriculture, and receives our waste. Our capacity to describe, or characterize, this environment is crucial to the solution of many resource, environmental, and engineering problems. And just as medical imaging technologies have reduced the need for exploratory surgeries, a variety of technologies hold the promise for rapid, relatively inexpensive noninvasive characterization of the Earth's subsurface. Seeing into the Earth examines why noninvasive characterization is important and how improved methods can be developed and disseminated. Looking at the issues from both the commercial and public perspectives, the volume makes recommendations for linking characterization and cost savings, closing the gap between the state of science and the state of the practice, and helping practitioners make the best use of the best methods. The book provides background on: The role of noninvasive subsurface characterization in contaminant cleanup, resource management, civil engineering, and other areas. The physical, chemical, biological, and geological properties that are characterized. Methods of characterization and prospects for technological improvement. Certain to be important for earth scientists and engineers alike, this book is also accessible to interested lay readers.

Download or read book Evaluation of geothermal energy exploration and resource assessment written by United States. Department of Energy. Division of Geothermal Energy and published by . This book was released on 1978 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development Analysis and Application of a Well by Well Method for Estimating Surface Heat Flow for Regional Geothermal Resource Assessment written by George Raymond Stutz and published by . This book was released on 2012 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The potential to utilize widespread low-grade geothermal resources of the Northeastern U.S. for thermal direct use and combined heat and power applications can be realized using technologies embodied in Enhanced Geothermal Systems (EGS). In lower grade regions, accurate knowledge of small variations in temperature gradient will be crucial to the economic viability of EGS development. To accurately map local temperature variations, resource assessments have relied largely on bottom hole temperature (BHT) measurements, primarily from oil and gas wells. As the volume of BHT data grows due to increased drilling activity, the ability to quickly analyze and incorporate additional data is critical. To accomplish this task, a thermal model was developed that is a refined and streamlined version of work previously started at Southern Methodist University (SMU) to map out the heat flow of the entire nation. The model developed for this work expands on their contributions and makes it much easier to incorporate the large amounts of data collected. Also, by being developed in Visual Basic for Applications, an Excel add-on, it is hoped that the model will help researchers at all levels of academia, government, and private industry look to EGS as a possible energy source. In order to facilitate EGS project placement and design, the model was used to draw a more complete picture of geothermal resources in the Northeastern United States, with a particular focus on New York and Pennsylvania, by incorporating thousands of new temperature-depth data collected as a result of continuing drilling for unconventional natural gas in the region. This project follows the entire evolution of an organic geothermal resource study from data collection to map production. Well data in the form of archived oil and gas well logs were collected from SMU, the Pennsylvania Geological Survey, the New York State Museum, and the New York State Department of Environ- mental Conservation. Using these new data, a series of maps covering the Appalachian Basin of New York and Pennsylvania were produced that show variations in subsurface thermal gradient and surface heat flow. The increased spatial accuracy and resolution compared to earlier geothermal maps of the Northeast U.S. illuminate better spatial variations in the resource quality and have a much smaller degree of uncertainty in both extent and magnitude. The maps indicate that the temperatures required for direct-use applications are available at technically viable drilling depths over a majority of the region. Smaller hot spot areas of higher than average heat flow are found in the Pennsylvania counties of Indiana, McKean, Lawrence, and Warren, as well as Cayuga County in New York. These anomalies represent the most ideal candidates for further exploration and characterization of their EGS potential. The model was then subjected to rigorous uncertainty analysis using Oracle Crystal Ball, a commercially available Monte Carlo simulator. This work integrated increasing complexity in the sedimentary cover of the Appalachian basin to test the precision of the predicted temperature at 6 km under Steuben County, NY. The results indicate that while the model does have inherent limitations that the user must be mindful of, it predicts temperature to a degree of precision and accuracy that is reasonable given its original purpose of incorporating very large datasets in an efficient manner.

Download or read book Geothermal Resource Assessment in Oklahoma written by William E. Harrison and published by . This book was released on 1983 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geothermal Well Technology and Potential Applications of Subterrence Devices written by John H. Altseimer and published by . This book was released on 1974 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Abandoned Oil and Gas Wells written by Agnes Geroso Reyes and published by . This book was released on 2007 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Geophysical Technologies for Subsurface Characterization written by Thomas W. Fogwell and published by . This book was released on 2006 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Signatures in the Subsurface Big Small Data Approaches for the Spatio Temporal Analysis of Geologic Properties Uncertainty Reduction written by Kelly Kathleen Rose and published by . This book was released on 2016 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite more than two centuries of exploration, including more than six million deep wellbores with depths exceeding 40,000 feet in some parts of the world, our ability to constrain subsurface processes and properties remains limited. Characteristics of the subsurface vary and can be analyzed on a variety of spatial scales. Characterization and prediction of subsurface properties, such as depth, thickness, porosity, permeability, pressure and temperature, are important for models and interpretations of the subsurface. Subsurface studies contribute to insights and understanding of natural system but also enable predictions and assessments of subsurface resources (water, heat, hydrocarbon, mineral, storage capacity) and support environmental and geohazard assessments. However, the availability of data to characterize these systems as well as the techniques that utilize those data vary significantly. There is a wealth of data and information in structured and unstructured datasets stemming from subsurface characterization and interpretation studies. In addition, the geo-data science landscape is shifting, becoming more open. This affords opportunities to fill knowledge gaps, mine large, interrelated datasets, and develop innovative methods to improve our understanding of the subsurface and the impacts of its exploration. This study demonstrates different approaches, at a range of scales, for evaluating subsurface properties using a combination of “small” and “big” data approaches. In particular, focusing on wellbore data which can be used to investigate questions at the individual well or the global scale. Wellbore related datasets, such as those associated with India’s NGHP-01 Site 17A, are the primary source of direct subsurface measurements. In this work, small-scale analyses from a single wellbore were used to establish that diagenetic mineralization is responsible for anomalous porosity preservation and enhanced permeability in sediments from NGHP-01 Site 17A. This relationship explains and further constrains how geologic history and architecture influences gas hydrate distribution both within the lithostratigraphic record at NGHP-01 Site 17A and in other sedimentary settings worldwide. In addition, collections of wellbore data are increasingly used in spatial statistical analyses to improve prediction of subsurface properties at the field to basin-scale. These analyses typically have disregarded contextual geologic information because of its complex and unstructured format. This results in the loss of valuable information. This study presents a structured, hybrid deductive-probabilistic approach that integrates both contextual geologic information with quantitative analytical tools to improve prediction of subsurface properties and reduce uncertainty. The Subsurface Trend Analysis approach is demonstrated and validated in the prediction of subsurface pressure for the north-central region of the Gulf of Mexico. Finally, this study assembles and presents together information for the global catalog of deep subsurface wells. This global dataset spans over two centuries of drilling and includes more than six million wellbore records. Spatial and temporal analyses performed using this dataset provide insights into the implications of human engineering of the subsurface worldwide. Collectively, these data were used to assess to what degree the subsurface has been perturbed by drilling related activities, and investigated how human changes to deep subsurface systems contrast with the effects of other species and processes on the planet.

Download or read book Subsurface Reservoir Characterization of the Oligocene Frio Formation written by Bryant West Bradley and published by . This book was released on 2013 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wilcox Sandstone Reservoirs in the Deep Subsurface Along the Texas Gulf Coast written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Regional studies of the lower Eocene Wilcox Group in Texas were conducted to assess the potential for producing heat energy and solution methane from geopressured fluids in the deep-subsurface growth-faulted zone. However, in addition to assembling the necessary data for the geopressured geothermal project, this study has provided regional information of significance to exploration for other resources such as lignite, uranium, oil, and gas. Because the focus of this study was on the geopressured section, emphasis was placed on correlating and mapping those sandstones and shales occurring deeper than about 10,000 ft. The Wilcox and Midway Groups comprise the oldest thick sandstone/shale sequence of the Tertiary of the Gulf Coast. The Wilcox crops out in a band 10 to 20 mi wide located 100 to 200 mi inland from the present-day coastline. The Wilcox sandstones and shales in the outcrop and updip shallow subsurface were deposited primarily in fluvial environments; downdip in the deep subsurface, on the other hand, the Wilcox sediments were deposited in large deltaic systems, some of which were reworked into barrier-bar and strandplain systems. Growth faults developed within the deltaic systems, where they prograded basinward beyond the older, stable Lower Cretaceous shelf margin onto the less stable basinal muds. Continued displacement along these faults during burial resulted in: (1) entrapment of pore fluids within isolated sandstone and shale sequences, and (2) buildup of pore pressure greater than hydrostatic pressure and development of geopressure.

Download or read book Gulf Coast Programmatic Environmental Assessment Geothermal Well Testing written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In accordance with the requirements of 10 CFR Part 711, environmental assessments are being prepared for significant activities and individual projects of the Division of Geothermal Energy (DGE) of the Energy Research and Development Administration (ERDA). This environmental assessment of geopressure well testing addresses, on a regional basis, the expected activities, affected environments, and possible impacts in a broad sense. The specific part of the program addressed by this environmental assessment is geothermal well testing by the take-over of one or more unsuccessful oil wells before the drilling rig is removed and completion of drilling into the geopressured zone. Along the Texas and Louisiana Gulf Coast (Plate 1 and Overlay) water at high temperatures and high pressures is trapped within Gulf basin sediments. The water is confined within or below essentially impermeable shale sequences and carries most or all of the overburden pressure. Such zones are referred to as geopressured strata. These fluids and sediments are heated to abnormally high temperatures (up to 260 C) and may provide potential reservoirs for economical production of geothermal energy. The obvious need in resource development is to assess the resource. Ongoing studies to define large-sand-volume reservoirs will ultimately define optimum sites for drilling special large diameter wells to perform large volume flow production tests. In the interim, existing well tests need to be made to help define and assess the resource. The project addressed by this environmental assessment is the performance of a geothermal well test in high potential geothermal areas. Well tests involve four major actions each of which may or may not be required for each of the well tests. The four major actions are: site preparation, drilling a salt-water disposal well, actual flow testing, and abandonment of the well.

Download or read book Environmental Assessment of Proposed Geothermal Well Testing in the Tigre Lagoon Oil Field Vermilion Parish Louisiana written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An environmental assessment is made of the proposed testing of two geopressured, geothermal aquifers in central coastal Louisiana. On the basis of an analysis of the environmental setting, subsurface characteristics, and the proposed action, potential environmental impacts are determined and evaluated together with potential conflicts with federal, state, and local programs. (LBS).

Download or read book A Preliminary Feasibility Study of Geothermal and Mineral Extraction Applications of Hydrocarbon Wells written by Daniel Brown and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Oil and gas production technology has steadily evolved over the past 150 years. As commodities, oil and gas play important roles in both US and worldwide markets and are often viewed as critical economic drivers and assessment tools of the marketplace. Even though almost all local communities are in some way dependent upon oil and gas resources, there are many variables that contribute to the uncertainty of these commodities such as exploitation dynamics (e.g. technological, production, and cost factors), international law and trade factors, and local legislation factors (national and below). Factors such as these can make venture investment risky. The market, being dynamic, can quickly create constraints for new ventures and are often difficult to predict. The decline of oil and gas prices over the past year has jeopardized newer oil and gas technologies that rely on higher commodity prices to maintain a profit. The newly developed plays of the Marcellus and Utica Shales are examples of this phenomena. Oil and gas are limited resources; therefore, the price will continue to climb at some point. However, in the short run as prices fluctuate, companies will enter and exit based on technology and commodity price. This same phenomenon occurs in traditional mining with both the resources and technology. Traditional mining is much older than oil/gas mining and the technological growth has not been quite as rapid. Resources, however, are becoming more difficult to exploit as they are also limited. Many of the concentrated resources currently mined will at some time transition to a cut-off value too low for traditional mining methods to be used. Alternatives to traditional mining are already being developed and studied in an effort to mitigate the mentioned future issues of limited high grade ore. Both traditionally mined and oil and gas commodities attempt to maximize the resources available within the respective reserves. This thesis explores the potential of utilizing oil and gas resources to their fullest extent. Additional revenue that can be made from an oil or gas well will help mitigate risks associated with development and investment. Developing technologies to build on already available infrastructures will also potentially mitigate substantial investment costs for subsidiary technologies as well as ancillary environmental issues. Overall this thesis examines the feasibility of retrofitting Marcellus and Utica gas wells into geothermal wells and the potential of utilizing oil and gas wells as sources of traditionally mined materials.

Download or read book A New Methodology for Evaluating Geothermal Potential written by I. Newton Durboraw and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Subsurface Investigations at the Roosevelt KGRA Utah Final Report written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the geothermal reservoir in the Roosevelt Hot Springs Known Geothermal Resource Area in Utah was carried out. The objective of this effort was to develop predictions for well production capacities, based on data taken during field tests and through use of a computer model. In turn, the production information could then be used in design optimization and economic analyses for development of the resource under study. Flow tests of a geothermal well, Utah State 14-2, were conducted. Data consisting of pressure and temperature logs as a function of depth were obtained. Maximum recorded temperature was 503°F (262°C) and maximum pressure, 954 psia (6.58MPa) as measured under flow conditions. Tests were run at rates up to 580,000 lb/hr (73.3 kg/sec) total flow. The information gathered during the testing was reduced and compared to results of a predictive computer model. Reservoir conditions in the Roosevelt Hot Springs KGRA are such that two-phase flow exists in the wellbore and, in some cases, also in the reservoir itself. The computer model employed in the analysis reflects current efforts to improve the state-of-the-art in the prediction of two-phase pressure drops in vertical systems. Predictions at flowrates of up to 300,000 lb/hr (38 kg/sec) matched quite well with test data, while modeling at higher flowrates (to maximum tested) showed progressively greater deviation from test data. Cause of the observed degradation is postulated to be the movement of the flash horizon into the reservoir, due to drawdown at high flowrates.

Download or read book Evaluating Sedimentary Basins for Geothermal Power Production Potential and Bottom hole Temperature Corrections written by Anna Marguerite Crowell and published by . This book was released on 2015 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: