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• W4236025566 abstract "The Effects of Acid Contact Time and the Resulting Weakening of the Rock Surfaces on Acid-Fracture Conductivity M. G. Melendez; M. G. Melendez Texas A&M U. Search for other works by this author on: This Site Google Scholar M. Pournik; M. Pournik Texas A&M U. Search for other works by this author on: This Site Google Scholar D. Zhu; D. Zhu Texas A&M U. Search for other works by this author on: This Site Google Scholar A. D. Hill A. D. Hill Texas A&M U. Search for other works by this author on: This Site Google Scholar Paper presented at the European Formation Damage Conference, Scheveningen, The Netherlands, May 2007. Paper Number: SPE-107772-MS https://doi.org/10.2118/107772-MS Published: May 30 2007 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Melendez, M. G., Pournik, M., Zhu, D., and A. D. Hill. The Effects of Acid Contact Time and the Resulting Weakening of the Rock Surfaces on Acid-Fracture Conductivity. Paper presented at the European Formation Damage Conference, Scheveningen, The Netherlands, May 2007. doi: https://doi.org/10.2118/107772-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE European Formation Damage Conference and Exhibition Search Advanced Search Abstract Acid fracturing is a stimulation process in which lasting conductivity after fracture closure is created by uneven etching of the fracture face. The success of an acid fracturing treatment depends on the conductivity created being retained under overburden stress. Fracture conductivity is usually predicted using correlations based on limited tests conducted at low injection rates that may misrepresent hydrodynamic effects that occur in the fracture. We have conducted a new series of acid fracture conductivity experiments at conditions more representative of field conditions to explore the correlation between the experimental conditions and the rock properties with the final conductivity.In order to reproduce field conditions in the lab, we have used a lab set up properly scaled through matching of dimensionless numbers. Tests were conducted with Indiana limestone, San Andres dolomite, and Texas Cream chalk. A gelled acid system was used with varying contact times. The etched fracture surface was characterized and the rock embedment strength was measured before and after acidizing in addition to standard conductivity measurements for each experiment.In this paper, the results from a systematic experimental study are presented. Experimental results illustrate that the fracture surface etching pattern is a dominant factor for fracture conductivity. If channels are created, the fracture will have retaining conductivity after closure. Rock strength is another important parameter in acid fracturing. Formations with low initial Rock Embedment Strength (RES) values or a lager reduction in RES after acid injection have lower conductivity after closure. Measurements and analyses of rock embedment strength provide understanding of the conductivity behavior in acid fracturing.The results of preliminary tests for a North Sea chalk are also presented and discussed in the paper. Keywords: reservoir geomechanics, Upstream Oil & Gas, Reservoir Characterization, fracture characterization, acidizing, closure stress, strength, dolomite, limestone, rock strength Subjects: Hydraulic Fracturing, Reservoir Characterization, Acidizing, Faults and fracture characterization, Reservoir geomechanics, Well Operations, Optimization and Stimulation Copyright 2007, Society of Petroleum Engineers You can access this article if you purchase or spend a download." @default.
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• W4236025566 title "The Effects of Acid Contact Time and the Resulting Weakening of the Rock Surfaces on Acid-Fracture Conductivity" @default.
• W4236025566 doi "https://doi.org/10.2523/107772-ms" @default.
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