27 Matching Results

Search Results

Advanced search parameters have been applied.
in creator/contributor: "Aziz, K."  
Results: 1 - 24 next
open access

Productivity and injectivity of horizontal wells. Quarterly report, January 1, 1996--March 31, 1996

Description: A reservoir simulator solves the flow equations numerically on grids defining a reservoir region. However, when a well is located in a grid-block, the block pressure is not equal to the well pressure. In order to join the well to the grid blocks in which the well is located, it is usual to use a single phase model to obtain the appropriate Well Index. The Well Index is based on the concept of an effective well radius at which the pressure of the block applies. This approach requires the flow in… more
Date: May 1, 1996
Creator: Aziz, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly technical progress report, October 1, 1995--December 31, 1995

Description: As the length of a horizontal well is increased, its contact with the reservoir increases. But at the same time, the resistance to the flow in the well also increases which has a direct negative effect on the productivity of the well. The overall performance of horizontal wells depends on the balance of these two opposing factors. No reliable tools are currently available that account for both these factors in the evaluation of horizontal well performance. An analytical well-model is developed … more
Date: February 1, 1996
Creator: Aziz, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Annual report, March 10, 1995--March 9, 1996

Description: The DOE approval for the annual renewal of the research grant to the Stanford Project on the Productivity and Injectivity of Horizontal Wells was received in early March 1995. Project goals include the advanced modeling of horizontal wells; investigation and incorporation of the effects of reservoir heterogeneities; development of improved methods of calculating multi-phase pressure drops within wellbores; development of multi-well models; testing of horizontal well models with field examples; … more
Date: May 1, 1996
Creator: Aziz, K. & Hewett, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of sorption/curved interface thermodynamics on pressure transient

Description: A simulation model capable of handling the effects of sorption was constructed. It accounts for the curved interface thermodynamics associated with adsorption and desorption. Data from several laboratory experiments were used to verify the model. The results indicated that simulation runs using sorption isotherms adequately model the pressure transient behavior observed in the laboratory experiments. Dry steam models severely underestimated the effective compressibility. Models using flat-inter… more
Date: January 26, 1995
Creator: Lim, K.T. & Aziz, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly report, April 1, 1995--June 30, 1995

Description: The following activities have been carried out in the last three months: Work on developing a three-dimensional Voronoi grid simulator is progressing. Extensive testing of the grid generation and visualization modules of the simulator is continuing while modifications and improvements are being made to these capabilities; The recently developed semi-analytical method for calculating critical cresting rates is being extended for the case of simultaneous gas and water coning toward a horizontal w… more
Date: August 1, 1995
Creator: Aziz, K. & Hewett, T.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly report, July 1--September 30, 1995

Description: During this quarter the authors have extended their earlier semi-analytical method for determining critical cresting rates in horizontal wells to the case of both water and gas cresting. The method and the procedure will be briefly described below. They also show the application of the method to an example problem and compare the results with direct numerical simulation.
Date: November 1, 1995
Creator: Aziz, K. & Hewett, T.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly report, April 1--June 30, 1996

Description: A number of activities have been carried out during this quarter of research. A list outlining these efforts is presented including: (1) The design and planning of the next phase of the two-phase flow experiments have moved forward. The necessary modifications to allow the use of wire-wrapped screens have been made. The flow loop and the data acquisition system are currently being tested and the new experiments are about to commence. (2) Work on obtaining exact well models for a horizontal well… more
Date: August 1, 1996
Creator: Aziz, K. & Hewett, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design and construction of an experiment for two-phase flow in fractured porous media

Description: In numerical reservoir simulation naturally fractured reservoirs are commonly divided into matrix and fracture systems. The high permeability fractures are usually entirely responsible for flow between blocks and flow to the wells. The flow in these fractures is modeled using Darcy`s law and its extension to multiphase flow by means of relative permeabilities. The influence and measurement of fracture relative permeability for two-phase flow in fractured porous media have not been studied exten… more
Date: August 1, 1993
Creator: Ayala, R. E. G. & Aziz, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly report, October 1--December 31, 1993

Description: A number of activities have been carried out in the last three months. A list outlining these efforts is presented below followed by brief description of each activity in the subsequent sections of this report: Progress is being made on the development of a black oil three-phase simulator which will allow the use of a generalized Voronoi grid in the plane perpendicular to a horizontal well. The available analytical solutions in the literature for calculating productivity indices (Inflow Perform… more
Date: March 10, 1993
Creator: Fayers, F. J.; Aziz, K. & Hewett, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly report, January 1, 1994--March 31, 1994

Description: During the last three months we have studied coning and cresting behavior in horizontal and vertical wells using the commercial simulator, Eclipse. In our second quarterly report we compared the predications of five analytical methods for critical rates and presented the results in a table for a gas-cresting example problem. In this quarterly report, wee present simulation results for the coning and cresting critical rates for vertical and horizontal wells.
Date: June 1, 1994
Creator: Fayers, F. J.; Aziz, K. & Hewett, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. [Quarterly report], March 10, 1993--June 30, 1993

Description: This project has been set up for the purpose of developing advanced performance prediction methods for horizontal wells (HWs) in heterogeneous reservoirs. The stimulus for this project arises from the fact that HWs are now being drilled in large numbers (e.g., over 900 HWs in 1992) and their benefits have provided the one example of an advanced oil recovery technique which is proving to be a general economic attraction. While the drilling techniques and completion practice have made great advan… more
Date: August 1, 1993
Creator: Fayers, F. J.; Aziz, K. & Hewett, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly report, April 1, 1994--June 30, 1994

Description: In the fifth quarter of this project, progress was made concerning four of the stated objectives of the project. First, extensive sensitivity studies, based on reservoir simulation, have been performed on a field example to assess the effects of wellbore friction, inflow, skin, length, and diameter of the well, etc. on the productivity of a horizontal well. Secondly, the authors have launched a new phase of the project on developing models for scale-up and coarse grid pseudo functions for horiz… more
Date: September 1, 1994
Creator: Fayers, F. J.; Aziz, K. & Hewett, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly report, July 1, 1993--September 30, 1993

Description: A number of research activities have been carried out in the last three months. A list outlining these efforts is presented below followed by brief description of each activity in the subsequent sections of this report: (1) The available analytical solutions in the literature for steady state critical rates of horizontal wells are examined. Application of these methods to a cresting example show significant uncertainties in prediction of critical rates. (2) Sensitivity computations have been ru… more
Date: December 1, 1993
Creator: Fayers, F. J.; Aziz, K. & Hewett, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly report, October 1--December 31, 1996

Description: This report describes progress on Tasks 1 and 4, Correlations for cresting behavior in horizontal wells. Research work on developing coarse grid methods to study cresting in horizontal wells was continued. The previous correlations for optimum grid size, breakthrough time, and post breakthrough behavior (i.e., water-oil ratio) were further tested and optimized. Procedures to derive pseudo-functions either using numerical correlations or coarse grid simulations have been proposed and successfull… more
Date: January 30, 1997
Creator: Aziz, K. & Hewett, T.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coorelations for cresting behavior in horizontal wells. Quarterly report, October 1, 1996--December 31, 1996

Description: The following activities have been carried out in the last three months. (1) The fourth review meeting of the Horizontal Well Industrial Affiliates Program was held on October 10-11 at Stanford. The meeting was well attended and well received. In addition to the project presentations, a number of member presentations were also made at the meeting. (2) Draft plans for the continuation of the two-phase flow experiments were drawn up and sent to Marathon and other members for their review and comm… more
Date: December 31, 1996
Creator: Aziz, K. & Hewett, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly report, July 1--September 30, 1996

Description: This quarterly report reports on the efforts on Task 2, effects of reservoir heterogeneities on performance prediction of horizontal wells. Performance prediction of horizontal and non-conventional wells based on both analytical and numerical tools rarely match actual performance. Even a history matched case with sufficient production data fails to give reliable predictions for long times. In this study the authors explore reasons for the inability of predictive tools to make accurate predictio… more
Date: December 31, 1996
Creator: Aziz, K. & Hewett, T.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Quarterly report, January 1, 1995--March 31, 1995

Description: This report presents skin factor calculations for vertical, horizontal, and deviated wells. Calculations for perforation, damage zone, crushed zone, non-darcy flow, and pressure drop due to the gravel packs are included.
Date: May 1, 1995
Creator: Fayers, F.J.; Aziz, K. & Hewett, T.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Research on oil recovery mechanisms in heavy oil reservoirs

Description: The goal of the Stanford University Petroleum Research Institute is to conduct research directed toward increasing the recovery of heavy oils. Presently, SUPRI is working in five main directions: To assess the influence of different reservoir conditions (temperature and pressure) on the absolute and relative permeability to oil and water and on capillary pressure; To evaluate the effect of different reservoir parameters on the in-situ combustion process. This project includes the study of the k… more
Date: January 1, 1991
Creator: Brigham, W.E.; Aziz, K. & Ramey, H.J. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Research on oil recovery mechanisms in heavy oil reservoirs

Description: The goal of the Stanford University Petroleum Research Institute is to conduct research directed toward increasing the recovery of heavy oils. Presently, SUPRI is working in five main directions: Assess the influence of different reservoir conditions (temperature and pressure) on the absolute and relative permeability to oil and water and on capillary pressure; evaluate the effect of different reservoir parameters on the in-situ combustion process. This project includes the study of the kinetic… more
Date: January 1, 1991
Creator: Brigham, W.E.; Aziz, K. & Ramey, H.J. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SUPRI heavy oil research program

Description: The 14th Annual Report of the SUPRI Heavy Oil Research Program includes discussion of the following topics: (1) A Study of End Effects in Displacement Experiments; (2) Cat Scan Status Report; (3) Modifying In-situ Combustion with Metallic Additives; (4) Kinetics of Combustion; (5) Study of Residual Oil Saturation for Steam Injection and Fuel Concentration for In-Situ Combustion; (6) Analysis of Transient Foam Flow in 1-D Porous Media with Computed Tomography; (7) Steam-Foam Studies in the Prese… more
Date: December 1, 1991
Creator: Aziz, K.; Ramey, H.J. Jr. & Castanier, L.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SUPRI heavy oil research program. Fourteenth annual report, October 1, 1989--September 30, 1990

Description: The 14th Annual Report of the SUPRI Heavy Oil Research Program includes discussion of the following topics: (1) A Study of End Effects in Displacement Experiments; (2) Cat Scan Status Report; (3) Modifying In-situ Combustion with Metallic Additives; (4) Kinetics of Combustion; (5) Study of Residual Oil Saturation for Steam Injection and Fuel Concentration for In-Situ Combustion; (6) Analysis of Transient Foam Flow in 1-D Porous Media with Computed Tomography; (7) Steam-Foam Studies in the Prese… more
Date: December 1, 1991
Creator: Aziz, K.; Ramey, H. J. Jr. & Castanier, L. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Productivity and injectivity of horizontal wells. Annual report, March 10, 1993--March 9, 1994

Description: In this report, the investigators review a range of reservoir scenarios in which horizontal wells can be advantageous and discuss some of the modeling problems associated with calculating well connection factors, productivity indices, coning behavior and well two-phase pressure drops. We show illustrative coning calculations and the implications of the well model on distribution of post-breakthrough gas saturations. Such calculations then open up the possibility of determining optimal recomplet… more
Date: October 1, 1994
Creator: Fayers, F. J.; Aziz, K.; Hewett, T. A. & Arbabi, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A study of steam injection in fractured media

Description: Steam injection is the most widely used thermal recovery technique for unfractured reservoirs containing heavy oil. There have been numerous studies on theoretical and experimental aspects of steam injection for such systems. Fractured reservoirs contain a large fraction of the world supply of oil, and field tests indicate that steam injection is feasible for such reservoirs. Unfortunately there has been little laboratory work done on steam injection in such systems. The experimental system in … more
Date: February 1, 1996
Creator: Dindoruk, M.D.S.; Aziz, K.; Brigham, W. & Castanier, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

General single phase wellbore flow model

Description: A general wellbore flow model, which incorporates not only frictional, accelerational and gravitational pressure drops, but also the pressure drop caused by inflow, is presented in this report. The new wellbore model is readily applicable to any wellbore perforation patterns and well completions, and can be easily incorporated in reservoir simulators or analytical reservoir inflow models. Three dimensionless numbers, the accelerational to frictional pressure gradient ratio R{sub af}, the gravit… more
Date: February 5, 1997
Creator: Ouyang, Liang-Biao; Arbabi, S. & Aziz, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen