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Book Productivity and Injectivity of Horizontal Wells Quarterly Report April 1 June 30 1996

Download or read book Productivity and Injectivity of Horizontal Wells Quarterly Report April 1 June 30 1996 written by and published by . This book was released on 1996 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 or a well of any general profile has continued. (3) Work on the application of horizontal wells in gas condensate reservoirs has progressed. The available methods and models are being critically evaluated with the aid of simulation runs. (4) Research work on developing coarse grid methods to study cresting in horizontal wells has continued. Correlations for optimum grid size, breakthrough time, and post breakthrough behavior (i.e. water-oil ratio) are being developed and tested for the problem of water cresting. (5) The Ph. D. project on three-dimensional flexible grid simulator (FLEX) was successfully defended in June. The FLEX simulator will be used in future studies as well as in future developments. The dissertation report will be submitted soon to the US DOE. This quarterly report is based on the last activity listed above. It shows the advantage of the new flexible grid simulator.

Book Productivity and Injectivity of Horizontal Wells Quarterly Report July 1 September 30 1996

Download or read book Productivity and Injectivity of Horizontal Wells Quarterly Report July 1 September 30 1996 written by and published by . This book was released on 1996 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 predictions. They consider a case where a vertical well has been drilled and cored. Then, they generate twenty consistent geostatistical descriptions of permeability and porosity that are all constrained to hard data obtained from the vertical well. Simulations with these realizations show large differences in production rate, WOR and GOR predictions as a result of variations in reservoir properties. It is also shown that the effect of well index (WI) on simulation results is large. Furthermore, for the example considered, analytical models for critical rate and productivity calculations were found to have limited practical use.

Book Productivity and Injectivity of Horizontal Wells Quarterly Report April 1 1994 June 30 1994

Download or read book Productivity and Injectivity of Horizontal Wells Quarterly Report April 1 1994 June 30 1994 written by and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 horizontal wells in heterogeneous reservoirs. The available methods have been applied to an example problem and their performance and limitations have been analyzed. Thirdly, the authors are in the process of developing a new analytical solution for the coning and cresting critical rates for horizontal wells. Finally, experimental data bases will be used to test the authors' newly developed general mechanistic model for two-phase flow.

Book Productivity and Injectivity of Horizontal Wells Quarterly Report October 1 December 31 1996

Download or read book Productivity and Injectivity of Horizontal Wells Quarterly Report October 1 December 31 1996 written by and published by . This book was released on 1997 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 successfully tested. The results reported here and other calculations show that the correlations developed in this work can be applied to a wide range of conditions for predicting the water break-through time (BT) and the water-oil-ratio (PBB) for horizontal wells. All of the correlations are based on the assumption of two-phase, two-dimensional flow in homogeneous reservoirs.

Book Productivity and Injectivity of Horizontal Wells Quarterly Report March 10 1993 June 30 1993

Download or read book Productivity and Injectivity of Horizontal Wells Quarterly Report March 10 1993 June 30 1993 written by and published by . This book was released on 1993 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 advances in the last 5 years, the position on reservoir engineering attributes and optimization of reservoir performance lags behind the other technical areas. This project has eight major objectives, of which in year one the following three tasks are involved: modeling horizontal wells; reservoir characterization; and experimental planning and interpretation. Technical progress of these tasks are presented.

Book Productivity and Injectivity of Horizontal Wells

Download or read book Productivity and Injectivity of Horizontal Wells written by Khalid Aziz and published by . This book was released on 2000 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Productivity and Injectivity of Horizontal Wells Annual Report March 10 1996 March 9 1997

Download or read book Productivity and Injectivity of Horizontal Wells Annual Report March 10 1996 March 9 1997 written by and published by . This book was released on 1997 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress is reported on the following tasks: advanced modeling of horizontal wells; heterogeneous effects of reservoirs; development of improved methods for calculating multi-phase pressure drops within the wellbore; pseudo-functions; development of multi-well models;testing of HW models with field examples; enhanced oil recovery applications; and application studies and their optimization.