Uncertainties in reservoir limit test results : effect of input parameters

Download

index.pdf

Date

2013

Author

Altınbay, Gül

Metadata

Show full item record

Item Usage Stats

159
views

117
downloads

Reservoir parameters from the well test data are essential for reservoir management. Especially the identification the presence of the reservoir boundaries is important for an appraisal well testing. Providing reserve estimation, identifying new well locations and well placement and avoiding dry holes are some important outcomes. However more work on precision of the input data is needed before using the calculated well test parameters. Lots of ambiguity in the results obtained from well tests should be considered because these input data is inevitably subject to estimation errors. When used in well test interpretation, each of them also brings its own source of errors. In this thesis, uncertainties caused by input parameters (rock properties and fluid properties) and measured data (flow rate and pressure) is discussed rigorously. By using the determined input parameters an experimental design is constructed. To reduce the errors and increase the confidence intervals, some remedies are used such as analyses procedure (use of deconvolution), design of well tests (longer build up times and more than one build up period after sufficient flow period). After running the cases of the experimental design, the results are used to develop a linear predictive model to conduct sensitivity analysis. A real field example is presented to illustrate such errors and the applied remedies to field application.

Subject Keywords

Petroleum reserves., Oil well drilling., Oil fields

URI

http://etd.lib.metu.edu.tr/upload/12616362/index.pdf
https://hdl.handle.net/11511/22945

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Uncertainties in Reservoir limit test results - Effect of input parameters Altinbay, G.; Akın, Serhat (2015-01-01) Reservoir parameters from the well test data are essential for reservoir management. Especially the identification the presence of the reservoir boundaries is important for an appraisal well testing. Providing reserve estimation, identifying new well locations and well placement and avoiding dry holes are some important outcomes. However more work on precision of the input data is needed before using the calculated well test parameters. Lots of ambiguity in the results obtained from well tests should be con...
Use of voronoi gridding in well test design Rahimov, Fuad; Sınayuç, Çağlar; Department of Petroleum and Natural Gas Engineering (2015) One of the most efficient tools to accurately characterize the reservoir and its nature is well testing. In the literature, well testing sometimes is referred as Pressure Transient Analysis (PTA). For the development strategy of the field both technical and economic considerations are involved. In order to perform well testing, firstly it needs to be correctly designed, otherwise well testing will not yield reliable information about the reservoir. There are both analytical and numerical techniques for the ...
Development of expert system for artificial lift selection Aliyev, Elshan; Sınayuç, Çağlar; Department of Petroleum and Natural Gas Engineering (2013) During the reservoir production life reservoir pressure will decline. Also after water breakthrough the fluid column weight will increase as hydrostatic pressure will increase because of increased water and oil mixture density. In this case, reservoir pressure may not be enough to lift up the fluid from bottom to the surface. These reasons decrease or even may cause to stop flowing of fluids from the well. Some techniques must be applied to prevent the production decline. Artificial lift techniques are appl...
Stochastic approach in reserve estimation Ülker, Emine Buket; Kök, Mustafa Verşan; Department of Petroleum and Natural Gas Engineering (2004) Geostatistics and more specifically stochastic modeling of reservoir heterogeneities are being increasingly considered by reservoir analysts and engineers for their potential in generating more accurate reservoir models together with usable measures of spatial uncertainty. Geostatistics provides a probabilistic framework and a toolbox for data analysis with early integration of information. The uncertainty about the spatial distribution of critical reservoir parameters is modeled and transferred all the way...
Numerical reservoir simulation of Alaşehir geothermal field Aydın, Hakkı; Akın, Serhat (null; 2020-02-10) Use of a comprehensive reservoir simulation is essential for an effective geothermal reservoir management. TOUGH2 has become a widely used simulator for this purpose. In this study, one of the most exploited geothermal fields in Turkey, Alaşehir geothermal field has been modeled by using TOUGH2 reservoir simulator. The study includes more than 100 wells, which are operated by 7 different developers. The total installed capacity of geothermal power plants in the field is 212 MWe, but additional capacity (98 ...

Citation Formats

G. Altınbay, “ Uncertainties in reservoir limit test results : effect of input parameters,” M.S. - Master of Science, Middle East Technical University, 2013.