Download or read book Numerical simulation of United States Gulf Coast geothermal geopressured reservoirs written by Ombo F. Isokrari and published by . This book was released on 1976 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book US Gulf Coast Geopressured geothermal Reservoir Simulation Final Report Year 3 written by and published by . This book was released on 1981* with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several reservoir model improvements incorporated into the UTA model are described. The most significant modification to the model was the inclusion of semiimplicit treatment of transmissibilities so as to better handle two-phase flow problems associated with flow near the wellbore. A description of the reservoir mechanics presumed operative in geopressured-geothermal reservoirs is included. A mathematical model describing two-dimensional flow in compacting porous media is developed from the Lagrangian point of view. A description of the way the differential equations are approximated by finite differences and subsequently solved by means of numerical procedures is presented. Various sensitivity studies made with the reservoir model are described. Particular emphasis was given to the study of potential shale dewatering effects on reservoir depletion and the effects of compaction on fluid recovery. To study shale dewatering, the shale thickness and the shale vertical permeability were treated as variables in several simulation experiments. The effects of compaction were modeled with optimistic and pessimistic values for the uniaxial compaction coefficient in an attempt to define a region of expected reservoir performance. Laboratory analysis of core samples obtained from the geopressured-geothermal test well was completed by the end of year 3. These data indicate that the uniaxial compaction coefficient is of the same order of magnitude as the pessimistic value used on the sensitivity studies. Because of this the expected fluid recovery from geopressured reservoirs has been reduced to a nominal 5% of the in-place volumes rather than the previously reported 10%.
Download or read book U S Gulf Coast Geopressured Geothermal Reservoir Simulation written by and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Gulf Coast geopressured geothermal reservoir simulation written by R. M. Knapp and published by . This book was released on 198? with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Gulf Coast Geopressured Geothermal Reservoir Simulation written by S. K. Garg and published by . This book was released on 1977 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Gulf Coast Geopressured geothermal Reservoir Simulation written by R. C. MacDonald and published by . This book was released on 1982 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Gulf Coast Geopressured Geothermal Reservoir Simulation written by R. M. Knapp and published by . This book was released on 1985 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Gulf Coast Geopressured geothermal Reservoir Simulation written by University of Texas at Austin and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulation of Geopressured Geothermal Reservoirs written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper discusses the governing equations describing mass and energy transport in geopressured geothermal reservoirs. A fully interacting rock-fluid system with rock porosity, permeability, and thermal conductivity dependent on the fluid and rock stresses is considered. The mathematical model includes the effects of solution and free natural gas. Sample calculations of a hypothetical hydrothermal reservoir are presented to show the applicability of reservoir simulation. (4 figs., 9 refs.).
Download or read book Gulf Coast Geopressured geothermal Reservoir Simulation written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of the short-term production tests run on the Pleasant Bayou No. 2 well are summarized. These tests were analyzed using conventional pressure test analysis methods. The effects of reservoir heterogeneties onm production behavior and, in particular, permeability distribution and faulting of reservoir sand were studied to determine the sensitivity of recovery to these parameters. A study on the effect of gas buildup around a producing well is reported. (MHR).
Download or read book Geothermal Energy Update written by and published by . This book was released on 1976 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Reservoir and Subsidence Simulations for the Austin Bayou Geopressured Geothermal Prospect written by and published by . This book was released on 1978 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the last several years, the University of Texas at Austin (UTA) has analyzed the geopressured tertiary sandstones along the Texas Gulf Coast with the objective of locating prospective reservoirs from which geothermal energy could be recovered. Of the ''geothermal fairways'' (areas with thick sandstone bodies and estimated temperatures in excess of 300 F), the Brazoria fairway appears most promising and the Austin Bayou Prospect has been developed within this fairway. A test well (DOE 1 Martin Ranch) is currently being drilled in this area. Pending the availability of actual well test data, estimated reservoir properties have been employed in numerical simulations to study the effects of variations in reservoir properties on the projected long-term behavior of the Austin Bayou Prospect. The simulations assess the sensitivity of the reservoir behavior to variations is estimated sandstone/shale distribution, shale compressibility, and vertical shale permeability. Further, hypothetical properties for the stress-deformation behavior of the rock formations were employed in a very preliminary study of the potential ground surface displacements that might accompany fluid production.
Download or read book Numerical simulation of two dimensional two phase geopressured geothermal reservoirs written by H. Ohkuma and published by . This book was released on 1980 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of Texas Gulf Coast Geopressured Geothermal Aquifers written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We would like to report that, at this time, we have coded and tested a model that simulates the behavior of a geopressured geothermal aquifer as it is subjected to production from one or more wells. We have tested this simulator by checking its computed responses against results as reported for systems that span the range of the abilities of the simulator. The general objective of our work was to develop and test a simulator for geopresured geothermal aquifers. The simulator considers the effects of heterogeneous and anisotropic porous media, and the presence of two fluid phases, water and natural gas. The natural gas can exist either in solution or as a separate and distinct flowing phase. The model includes several drive mechanisms which we feel will be significant: these include the water compressibility, the rock matrix compressibility, the changes that occur in pore volume as the aquifer is compacted, the influx of water from adjacent shales either at the edge of the sandstone body or immediately above it or below it, and the expansion of the natural gas either in solution or as a free-phase. We feel that such a model can be used for depletion studies. With the addition of thermal effects it can be used to study the feasibility of reinjecton of "cool" used water. The simulator is the result of combining the momentum transport equation for water and gas with constitutive equations describing the changes of fluid properties with pressure and the changes of formation parameters, such as porosity, permeability and formation thickness with decreasing pore pressure. The resulting equations, shown in the appendix, are solved using finite difference methods to obtain pressure distributions within the aquifer. The energy transport equation can be added to the set of equations and solved to obtain temperature distributions. At the University of Texas, we have done this in a decoupled fashion in order to examine long-term effects. We do not feel that this is adequate for the thermodynamically demanding case of water reinjection. The goal of the model development was to have a mechanism for performing reservoir engineering studies on potential geopressurized geothermal reservoirs. 1 fig., 3 refs.
Download or read book United States Gulf Coast Geopressured Geothermal Program Consolidated Research Program written by and published by . This book was released on 1993 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last quarter, work has focused on developing a numerical model to. approximate the flow characteristics of the Gladys McCall reservoir. Various reservoir models have been used in the study to simulate the well transient pressure and pressure derivative behavior during the reservoir production period. The pressure behavior of the 1983 Reservoir Limits Test (RLT) was closely matched by an elongated linear reservoir model with the well located off-center. The matching procedure appears to provide reasonable estimates of the probable configuration of Gladys McCall reservoir.geometry. Double-slope pressure behavior (on a semilog plot) develops after the. early radial flow period, indicating the existence of a no-flow boundary near the well. At later times, linear flow character (square-root-time straight line) becomes clear when two closer boundaries are both felt at the well.
Download or read book United States Gulf Coast Geopressured Geothermal Program Consolidated Research Program Third Quarterly Technical Progress Report October 1 1992 December 31 1992 written by and published by . This book was released on 1993 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last quarter, work has focused on developing a numerical model to. approximate the flow characteristics of the Gladys McCall reservoir. Various reservoir models have been used in the study to simulate the well transient pressure and pressure derivative behavior during the reservoir production period. The pressure behavior of the 1983 Reservoir Limits Test (RLT) was closely matched by an elongated linear reservoir model with the well located off-center. The matching procedure appears to provide reasonable estimates of the probable configuration of Gladys McCall reservoir.geometry. Double-slope pressure behavior (on a semilog plot) develops after the. early radial flow period, indicating the existence of a no-flow boundary near the well. At later times, linear flow character (square-root-time straight line) becomes clear when two closer boundaries are both felt at the well.
