Practical Use of Deconvolution Method to Solve Well Interpretation Ambiguity of Field Data

• Main Author: Dwijayanto, Brian
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/40239
• Institution: Institut Teknologi Bandung

Well test analysis plays a critical role to obtain reservoir and well information for correlate geological, geophysical, and petrophysical data to build reservoir model. Two of pressure transient basic procedures are drawdown and build-up test. However, the result obtained from both drawdown and build-up test sometimes still unclear and have significant error. To minimize the problem, pressure deconvolution method is introduced. Pressure rate deconvolution is technique to transform variable-rate pressure data into a constant-rate initial drawdown with a duration equal to the total duration of the test, and yields directly the corresponding pressure derivative, normalized to a unit rate. This method generates free from distortions derivative caused by pressure-derivative calculation algorithms, from errors introduced by incomplete or truncated rate histories, and exhibits all the flow regimes that have been dominating throughout the test. Despite rapid development in deconvolution, it has not been widely used by practicing engineer. This paper primary objective is to use deconvolution tool to generate a free from distortion pressure-derivative result for futher analysis in radius of investigation and reservoir boundary. This paper shows the advantage of using deconvolution method, which is important to get a better interpretation from pressure transient test.