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Keywords: acid stimulation
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Proceedings Papers

Paper presented at the SPE International Conference and Exhibition on Formation Damage Control, February 19–21, 2020
Paper Number: SPE-199331-MS
... Fluid Dynamics well injectivity production enhancement cleanout objective formation damage open hole Blockage intervención de pozos petroleros acid stimulation obstruction formation damage Upstream Oil & Gas stimulation power water injector water injector nozzle drilling fluids and...
Proceedings Papers

Paper presented at the SPE International Conference and Exhibition on Formation Damage Control, February 19–21, 2020
Paper Number: SPE-199244-MS
... Abstract The foremost purpose of carbonate matrix acid stimulation is to improve near wellbore flow conductivity, induce the desired conduits, and bypass the formation damage. Hydrochloric acid (HCl) is the most predominantly used treatment fluid to treat carbonate formations, enhance...
Proceedings Papers

Paper presented at the SPE International Conference and Exhibition on Formation Damage Control, February 24–26, 2016
Paper Number: SPE-178996-MS
... Abstract This paper summarizes a wide variety of sandstone acid stimulation case histories, highlighting different aspects, such as mechanical conditions and operational practices. These include injection sequence changes, injectivity factor calculations, treatment volumes, quality control...
Proceedings Papers

Paper presented at the SPE International Symposium and Exhibition on Formation Damage Control, February 15–17, 2012
Paper Number: SPE-149997-MS
.... Acid stimulation fluids are usually mixed with fresh water, but if fresh water supplies are limited or unavailable, seawater is sometimes substituted in part or full. However, when acid systems are mixed with seawater containing high levels of sulfate ions, calcium sulfate precipitates as the acid...
Proceedings Papers

Paper presented at the SPE International Symposium and Exhibition on Formation Damage Control, February 10–12, 2010
Paper Number: SPE-127318-MS
... demonstrates a competent method to clean out the ICD completion along the horizontal section and to remove formation damage. This paper presents in depth discussion of rigless acid stimulation operations on oil producers to remove formation damage and improve well productivity, at a reduced cost. This paper...
Proceedings Papers

Paper presented at the SPE International Symposium and Exhibition on Formation Damage Control, February 15–17, 2006
Paper Number: SPE-98357-MS
... SPE 98357 Optimization of Acid Stimulation for a Loosely Consolidated Brazilian Carbonate Formation Multidisciplinary Laboratory Assessment and Field Implementation B.R. Lungwitz, SPE, Schlumberger; R.L. Hathcock, SPE, K.R. Koerner, SPE, D.M. Byrd, SPE, and M.J. Gresko, SPE, Devon Energy Corp...
Proceedings Papers

Paper presented at the SPE International Symposium and Exhibition on Formation Damage Control, February 18–20, 2004
Paper Number: SPE-86543-MS
... Abstract Completions in the Weber formation have historically been perforated over balanced and then acid stimulated. Flow rates before acidizing were virtually 0 Mcf/D. Acid was an important step in the completion process. The Weber gas reservoir has low permeability (0.5 – 1.5 mD) and is now...
Proceedings Papers

Paper presented at the SPE International Symposium on Formation Damage Control, February 23–24, 2000
Paper Number: SPE-58736-MS
... Abstract Techniques were developed to evaluate acid stimulation treatments based on chemical analysis of the return fluids. Four acid stimulation treatments of seawater injection wells in a large carbonate reservoir in Saudi Arabia were studied in detail. Acid was bullheaded because surface...
Proceedings Papers

Paper presented at the SPE International Symposium on Formation Damage Control, February 23–24, 2000
Paper Number: SPE-58763-MS
... should stay contained. A 2,500-gal. acid stimulation was pumped ahead of a 1,500-gal mini-frac. The main treatment was designed to place 20,000 lbs. of proppant at 15 BPM. Three radioactive tracers were pumped to better understand fracture geometry, and the pad, 1–4 ppa, and 5–12 ppa slurries were...
Proceedings Papers

Paper presented at the SPE Formation Damage Control Symposium, February 14–15, 1996
Paper Number: SPE-31092-MS
.... Three critical issues were studied. They were fluid loss control, pre-gravel-pack acid stimulation, and internal gravel packing. Laboratory studies showed that an activated hydroxyethylcellulose (HEC) pill could be designed to control the fluid loss for more than 30 hr even at a bottomhole temperature...
Proceedings Papers

Paper presented at the SPE Formation Damage Control Symposium, February 14–15, 1996
Paper Number: SPE-31077-MS
... gravel packed interval. Svendsen et al. 7 describe the preparations for the first matrix acid stimulations, the implementation of the treat- ments, and the technical and econqmical post evaluations. The first acid stimulation reduced the pressure drop in A-23 by 75%, in A-16A by 95% \nd in B-9 by 90...

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