The First Successful Impulse Test on Coiled Tubing Results in Reliable Reservoir Evaluation for Non-Naturally Flowing Wells (2010)

The First Successful ImpulseTest on Coiled Tubing Results in Reliable Reservoir Evaluation for Non-naturally Flowing Wells Anna Guichard; Anna Guichard Schlumberger Search for other works by this author on: This Site Google Scholar Lang Zhan; Lang Zhan Schlumberger Search for other works by this author on: This Site Google Scholar Lambert Dilling; Lambert Dilling Schlumberger Search for other works by this author on: This Site Google Scholar Alejandro Giaquinta; Alejandro Giaquinta Qarun Petroleum Company Search for other works by this author on: This Site Google Scholar Ezz Eldin Mohamed; Ezz Eldin Mohamed Qarun Petroleum Company Search for other works by this author on: This Site Google Scholar Ahmed Hamdy Awaad Ahmed Hamdy Awaad Qarun Petroleum Company Search for other works by this author on: This Site Google Scholar Paper presented at the North Africa Technical Conference and Exhibition, Cairo, Egypt, February 2010. Paper Number: SPE-128429-MS https://doi.org/10.2118/128429-MS Published: February 14 2010 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Guichard, Anna , Zhan, Lang , Dilling, Lambert , Giaquinta, Alejandro , Mohamed, Ezz Eldin, and Ahmed Hamdy Awaad. "The First Successful ImpulseTest on Coiled Tubing Results in Reliable Reservoir Evaluation for Non-naturally Flowing Wells." Paper presented at the North Africa Technical Conference and Exhibition, Cairo, Egypt, February 2010. doi: https://doi.org/10.2118/128429-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE North Africa Technical Conference and Exhibition Search Advanced Search Abstract In mature fields it can often be a challenge to obtain accurate well data and reliable formation parameters without imposing high cost and time constraints on development or production schedules. One common method to test non-naturally flowing wells is impulse testing, which makes use of differential pressures between the formation and a surge chamber or wellbore to perform a short flow period or surge test, followed by a relatively short shut-in period. Unfortunately, these tests frequently result in invalid or uninterpretable data as a result of several uncertainties and test constraints.An improved version of this common technique encompasses a three-fold approach to optimize the impulse test. A new numerical simulator designs the test to maximize depth of investigation without compromising the interpretable data. The coiled tubing-conveyed intelligent bottomhole assembly used to execute the impulse test may, in certain environments, reduce operating times in comparison to use of conventional tubing-conveyed solutions. The combination of the prejob design package and a functional bottomhole assembly enables consideration of the complexities that can result from impulse testing so that a valid data set is delivered. The interpretation is performed using traditional well test interpretation methodology and an analytical solution specifically designed for impulse testing. This solution considers the wellbore fluid density variation during the test while still maintaining the simplicity of the wellbore model; variable skin is described by an exponential function, thus improving on established analytical methods. A comparison of the results from both interpretation methods establishes the test validity in terms of flow capacity and skin. This paper describes the systematic approach, including its design, execution, and interpretation, and highlights advantages and limitations through the case study and field data of a well in the Wadi Rayan field of Qarun Petroleum Company.This technique offers a rigless testing method that can optimize test time while delivering valid, accurate results that aid in production forecasting, completion optimization, and planning of remedial intervention for non-naturally flowing wells. Keywords: pressure transient analysis, permeability, flow rate history, upstream oil & gas, pressure measurement, pressure transient testing, interpretation, history, wellbore storage, investigation Subjects: Formation Evaluation & Management, Pressure transient analysis, Drillstem/well testing Copyright 2010, Society of Petroleum Engineers You can access this article if you purchase or spend a download.