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Lookup NU author(s): Dr Muhammad Ayub
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Matrix acidizing of two Khuff bilateral horizontal gas wells was performed using fiber optic enabled coiled tubing (FOECT) distributed temperature surveys (DTS) to optimize acid coverage and well productivity. Cleanout and stimulation of each wellbore was facilitated with a 2 7/8 in. high-pressure jetting tool. Lateral access and lateral confirmation was enabled using the multilateral selective reenter tool and real time DTS measurements. In each well, placement of the main treating fluid, i.e., HCl, was modified real time based on the temperature response observed with DTS profiles. Treatment fluid loss to the lateral window/junction or to the toe could be confirmed with downhole measurements and controlled with real time modifications of the treatment fluid pumping schedule. DTS profiles, after each of the modified acid treatment stages, indicated significant incremental improvements towards uniform fluid placement, compared to the pre-stimulation preflush injection profiles. Post flush evaluation in each lateral confirmed diversion efficiency of the chemical diverter. Downhole FOECT data supported by real time interpretation during key stages of the treatment resolved the uncertainties associated with conventional acid stimulation of multilateral open hole carbonate wells, and enabled proper control of CT stimulation jobs. Optimum acid coverage of target zones was achieved.
Author(s): Garzon F, Amorocho J, Al-Harbi M, Al-Shammari N, Al-Ruwaished A, Ayub M, Kharrat W, Burgrov V, Jacobson J, Brown G, Noya V
Publication type: Article
Publication status: Published
Journal: Saudi Aramco Journal of Technology
Year: 2010
Issue: summer
Pages: 23-33
Print publication date: 01/06/2010
ISSN (print): 1319-2388
ISSN (electronic):
Publisher: Saudi Aramco
