Download or read book Petrographic Characterization of the Barnett Shale Fort Worth Basin Texas written by Petros Konstantinos Papazis and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shale sedimentology is one of the less explored areas of sedimentary geology. Shales account for two-thirds of the sedimentary rock record and preserve large portions of Earth's history in relatively continuous successions. In addition, these rocks serve as key element of basin-scale fluid flow systems and are the primary source of materials released from water-rock interactions at depth. The Mississippian Barnett Shale of north-central Texas is of particular interest because it serves as both source rock and hydrocarbon reservoir for the Newark East Field, the largest gas field in Texas (Montgomery et al., 2005), and the target of intense current exploration interest. This study explores the petrographic characterization of the Barnett Shale by identifying the different silt-, sand-, and granule-size grain types; quantifying percentages and ratios of clay-size to silt-, sand-, and granule-size grain fractions; and determining the nature of the clay-size constituents. Samples used in this study come from four cores in Cooke, Erath, and Wise counties in north-central Texas, and from outcrop in Lampasas and San Saba counties in central Texas. An integrated approach utilizing transmitted polarized light microscopy, secondary and back-scattered electron imaging, cathodoluminescence imaging, X-ray mapping, and X-ray diffraction is applied to 76 polished thin sections. Five major lithologic groups are identified from core observations: 1) black shale relatively lacking in silt-size particles; 2) calcite-rich lithologies; 3) silt-rich black shale; 4) coarse grain accumulations that include calcite-rich and phosphate-rich varieties; and 5) concretions. Grain types for each lithology are classified based on their provenance, as either extrabasinal or intrabasinal particles. Extrabasinal particles include plant fragments and detrital silt-size quartz, feldspar, and mica. Intrabasinal particles are subdivided into calcareous and non-calcareous fossils, coated grains, and phosphatic intraclasts. Authigenic phases identified include Ca-phosphate, calcite, dolomite, ankerite, pyrite, quartz, albite (?), chlorite, barite, sphalerite, P-rich moganite, and titanium-oxide. The results of this study reveal that clay minerals are not the dominant components in these rocks, which are dominated instead by silt- and clay-size quartz, and locally, by biogenic debris and phosphatic intraclasts. This research demonstrates that the Barnett contains rich variety of lithologies that denote important environmental variations. Ultimately, documentation of the spatial distribution of these lithologic types can contribute to regional environmental/stratigraphic model that can then be further linked to mechanical properties within this important economic unit. An understanding of rock properties in the Barnett has wide-ranging implications because this little-understood rock type forms fractured-shale gas systems worldwide

Download or read book Petrographic Analysis of the Barnett Shale in the Fort Worth Basin written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Five facies are present in the Barnett Shale (Mississippian) in a core taken in the southern part of the Fort Worth basin. Facies A is a laminated, silty claystone to siltstone with glauconite grains and sand-sized shale rip-up clasts. It is found only at the top of the core and comprises just 7% of the cored interval. The facies is characterized by fine horizontal laminae undisrupted by bioturbation. Facies B consists of light-colored, limey layers that react vigorously with dilute HCl. The layers occur as thin interbeds in facies E throughout the core. Facies B comprises 4% of the cored interval. The contacts with the overlying and underlying dark, argillaceous claystones of facies E are flat and sharp. Calcite-rich concretions comprise facies C. Laminae in the surrounding claystones are bent around the concretions indicating that the concretions formed at an early stage of burial, before the claystones were completely compacted. Facies C comprises 2% of the core. Facies D is characterized by abundant, large, broken shell fragments. The layers containing the shells are interbedded with dark gray to black claystones of facies E. The shell layers make up only 1% of the cored interval. Facies E makes up the vast majority of the Barnett Shale86% of the total core. It is a dark-colored, fine-grained rock. The color ranges from dark gray to black. The rock consists predominantly of clay-sized particles, but contains varying amounts silt-sized, and even sand-sized material. These coarser grains include calcareous and siliceous bioclasts, shale rip-up clasts, phosphatic material and quartz grains.

Download or read book Characterization of the Mississippian Barnett Shale Formation Well Using Organic Geochemistry Parameters and Their Relationship with Different Lithofacies Fort Worth Basin Texas written by Guillermo Antonio Lo Mónaco Carías and published by . This book was released on 2012 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantative Petrophysical Characterization of the Barnett Shale in Newark East Field Fort Worth Basin written by Roderick Perez and published by . This book was released on 2009 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geologic Setting and Reservoir Characterization of Barnett Formation in Southeast Fort Worth Basin Central Texas written by Xufeng Liu and published by . This book was released on 2014 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mississippian Barnett Formation is a prolific shale-gas reservoir that was deposited in the Fort Worth Basin, Texas. Many previous studies of the Barnett Formation have been conducted in the main production area; few studies have been made of the Barnett Formation in the southern part of the basin, which is a less productive area. In the present research, several cores from the Barnett Formation in Hamilton County, southeast Fort Worth Basin, are studied in detail. Two vertical, continuous cores from Hamilton County, Texas, were studied to delineate the depositional setting, lithofacies, pore types, and reservoir quality of the Barnett Formation in the area. Five lithofacies were defined by analysis of the two cores: (1) laminated clay-rich silty and skeletal peloidal siliceous mudstone; 2) laminated skeletal silty peloidal siliceous mudstone; 3) nonlaminated silty peloidal calcareous mudstone; 4) laminated and nonlaminated skeletal calcareous mudstone; and 5) skeletal phosphatic packstone to grainstone. As indicated from this study, the dominant organic matter type is a mixture of Type II (major) and Type III (minor) kerogen having a mean TOC content of approximately 4%. Analysis of Rock Eval data shows that most of the interval is within the oil window; calculated Ro is approximately 0.9%. Organic geochemistry shows that the hydrocarbon generation potential of the abundant oil-prone kerogen was excellent. Mineralogical analysis reveals that the two types of siliceous mudstone, which are similar in composition to the siliceous mudstone in the main producing area in the northern Fort Worth Basin, are good for hydraulic fracturing and production, but they are also limited by their marginal thickness. Organic matter pores, which are the dominant pore types in these two cores, are consistent with pore types found in currently producing wells in the Newark East Field. This research also suggests that the deposition of Barnett Formation was controlled largely by basinal geometry, suspension settling, and slope-originated gravity-flow events. Skeletal deposits and carbonate-silt starved ripples suggest gravity-flow deposits and bottom-current reworking during deposition. Redox-sensitive elements and degree of pyritization both indicate anoxic/euxinic conditions during the deposition of the Barnett Formation.

Download or read book Shale Reservoirs written by John Breyer and published by AAPG. This book was released on 2012-08-20 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardcover plus CD

Download or read book Well Log and Core derived Reservoir Properties of Barnett Shale of Fort Worth Basin written by Melanie Ybarra and published by . This book was released on 2015 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireline tools and log analysis methods were not designed for unconventional reservoirs. As a result, hydrocarbon assessment for shale source rock plays have significant uncertainties. This study focuses on petrophysical interpretation uncertainty from a single historic Barnett Shale well TP Sims #2 of Wise County, TX. The Barnett Shale is one of the major source rock plays in the United States. The large body of research and information from the well-drilled Barnett Shale provides a good opportunity to understand and adjust OGIP modeling approaches from volumetric analysis to well performance data. Several factors unique to shale source rocks such as TOC and pyrite have been incorporated into wireline log interpretation using core-derived correlations. Key petrophysical parameters that are estimated from well logs calibrated to core data include: mineral volumes, porosity, net pay, and water saturation. Volumetric OGIP calculations from a range of well log analysis results that have been calibrated to core for TP Sims #2 are compared with EUR data. The resulting recovery factors are larger than expected which may mean that volumetric OGIP remains deficient for resource assessment of shale plays.

Download or read book Geochemical Controls on Production in the Barnett Shale Fort Worth Basin written by Jana L. Klentzman and published by . This book was released on 2009 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Newark East field (Barnett Shale) in the Fort Worth Basin, Texas currently has the largest daily production of any gas field in Texas. Major controls on production in the basin include: the quantity and character of organic matter, the thermal maturity history, and the mineralogy of the Barnett Shale. This study uses Rock Eval to investigate the quantity and character of the organic matter and general thermal maturity, vitrinite reflectance, [delta]13C of produced methane and methane abundance to evaluate thermal maturity in more detail, and x-ray diffraction (XRD) to determine mineralogy. Based on these analyses, it is apparent that the best production from the Barnett Shale is typically found in maturation areas from 1.65 to 2.10%Ro with high organic carbon content, high quartz content, low calcite content and low dolomite content.

Download or read book Remagnetization and Chemical Alteration of Sedimentary Rocks written by Richard Douglas Elmore and published by Geological Society of London. This book was released on 2012 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Barnett Shale written by Scott L. Montgomery and published by . This book was released on 2004 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrophysical Characterization of Barnett Shale Play written by Sagar Vivek Kale and published by . This book was released on 2009 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of Water Production in the Barnett Shale Fort Worth Basin Using Multivariate Statistics and Integrated Reservoir Characterization Techniques written by Jared Saucedo and published by . This book was released on 2020 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Barnett Shale, Fort Worth Basin, remains one of the largest shale plays in the world. Whereas gas production in most of the play is considered economical, a limiting factor is the tendency of wells to produce large volumes of water, particularly outside the Newark East Field, in the expansion area. This thesis investigates water production trends in the expansion area, using production and well data from 3,720 wells, by testing the hypothesis that faults and karst features (collapse chimneys) act as water conduits when fracked into, causing communication between the Ellenburger and Barnett and increased water production. To rule out an explanation of water production trends in terms of completion parameters, well architecture and fracability, these variables were correlated with water production using univariate and multivariate regression analyses. The only statistically significant relationship was between injected water and returned water, yielding an R2 = 98%. Next, using seismic data to model faults and chimneys, water production was compared in wells that were drilled into either feature with the nearest neighboring wells that were not. This was accomplished by integrating seismic and well log data to display wellbores in a 3D interpretation space so that horizontal wellbores intersecting (and thus fracking) into faults or chimneys could be determined. The results of comparing water production in wells that penetrate a fault or chimney showed that, on average, wells that penetrate a fault or chimney produce insignificantly more water than the nearest neighboring wells that do not. Thus, this study found the hypothesis that faults and chimneys act as water conduits when fracked into, resulting in higher water production, to be false.

Download or read book Transport in Shale Reservoirs written by Kun Sang Lee and published by Gulf Professional Publishing. This book was released on 2019-02-20 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport in Shale Reservoirs fills the need for a necessary, integrative approach on shale reservoirs. It delivers both the fundamental theories of transport in shale reservoirs and the most recent advancements in the recovery of shale oil and gas in one convenient reference. Shale reservoirs have distinctive features dissimilar to those of conventional reservoirs, thus an accurate evaluation on the behavior of shale gas reservoirs requires an integrated understanding on their characteristics and the transport of reservoir and fluids. Updates on the various transport mechanisms in shale, such as molecular diffusion and phase behavior in nano-pores Applies theory to practice through simulation in both shale oil and gas Presents an up-to-date reference on remaining challenges, such as organic material in the shale simulation and multicomponent transport in CO2 injection processes

Download or read book The Barnett Shale Play written by Dan B. Steward and published by . This book was released on 2007 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reservoir Characterization of the Clough Area Barnett Shale Wise County Texas written by N. C. Hill and published by . This book was released on 1995 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological petrophysical and engineering analysis of the Barnett Shale Mitchell Energy Corporation T P Sims No 2 Wise County Texas written by Gas Research Institute and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of the work performed by CER on this co-op well were to acquire and analyze data to determine the hydraulic fracture azimuth and reservoir characteristics of the Clinton Sandstone at this particular well location in eastern Ohio. The results of this analysis would be integral to evaluation of the Clinton Sandstone as a viable horizontal drilling candidate formation.

Download or read book Fundamentals of Gas Shale Reservoirs written by Reza Rezaee and published by John Wiley & Sons. This book was released on 2015-07-01 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides comprehensive information about the key exploration, development and optimization concepts required for gas shale reservoirs Includes statistics about gas shale resources and countries that have shale gas potential Addresses the challenges that oil and gas industries may confront for gas shale reservoir exploration and development Introduces petrophysical analysis, rock physics, geomechanics and passive seismic methods for gas shale plays Details shale gas environmental issues and challenges, economic consideration for gas shale reservoirs Includes case studies of major producing gas shale formations