Well Test Analysis of Deforming Reservoirs by use of MDH Type Curves
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2016 by IJETT Journal|
|Year of Publication : 2016|
|Authors : Tom A. Jelmert, Tommy Toverud
|DOI : 10.14445/22315381/IJETT-V38P250|
Tom A. Jelmert, Tommy Toverud"Well Test Analysis of Deforming Reservoirs by use of MDH Type Curves", International Journal of Engineering Trends and Technology (IJETT), V38(5),276-281 August 2016. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
The objective of this study is to predict changes in formation thickness, permeability, and porosity, as a function of fluid pressure. The methodology depends on well test interpretation by type curve matching. Changes in formation permeability may lead to poor well performance. Compaction may lead to reduced well integrity, notably for vertical and deviated wells. Then, there may be additional relative movement between the well and the formation in comparison with conventional reservoirs. Use of well-known transformations leads to diffusivity equations of linear appearance. Many solutions are available. Corresponding pressure solutions may be obtained by an inverse transformation.We find that, for a deforming reservoir, analysis based on the method of permeability modulus gives the composite (sum) elastic modulus.By interpretation of MDH type curves for build-up tests, we quantify the values of the elasticity moduli for both the thickness and permeability.
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