Acid Jetting in Carbonate Rocks: An Experimental Study
- Vanessa Ndonhong (Texas A&M University) | Emmanuel Belostrino (Texas A&M University) | Ding Zhu (Texas A&M University) | A D. Hill (Texas A&M University) | Richard E. Beckham (ExxonMobil) | Chris E. Shuchart (ExxonMobil)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- May 2018
- Document Type
- Journal Paper
- 382 - 392
- 2018.Society of Petroleum Engineers
- acid jetting, matrix acidizing
- 3 in the last 30 days
- 556 since 2007
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Acid jetting, as a well-stimulation method for carbonate reservoirs, has shown optimistic results in the production enhancement of some extended-reach horizontal wells. It was used initially to promote damage removal along a wellbore by means of multiple strategically located injection nozzles. It has the potential to place the injecting fluid at the locations that need stimulation. Jetting may also enhance wormhole propagation compared with conventional matrix acidizing. The hypotheses for the design of more-efficient stimulation treatments are currently being investigated.
We have conducted an experimental study to investigate the effect of jetting on wormhole efficiency. Each jetting experiment was conducted as a constant-pressure (equivalent to a desired initial flux through the core) linear coreflood test, in which a standoff distance is maintained between the injection nozzle tip and the core. At low-velocity acid injection, jetting effectively removes mud filter cake by mechanical actions. Jetting also creates wormholes in limestone cores. The combination of mechanical and chemical reaction stimulates limestone rocks better than matrix acidizing without the jetting nozzle. When the jetting velocity increased, the dissolution pattern changed. An isolated local compact dissolution results in a cavity at the entries of core samples by jetting, followed by a wormhole structure. With the known dissolution pattern, sensitivity studies are carried out to investigate the effect of various parameters on the experimental outcome.
We used Indiana and Winterset limestone rocks in the experiments. A 15% hydrochloric acid (HCl) (by weight) at ambient temperature was used, and the core dimensions were 4 in. in diameter and 16 in. in length. Various combinations of acid jetting velocities and acid fluxes were considered. The Winterset limestone cores are more heterogeneous, with higher porosity and lower permeability than the Indiana limestone cores. The experimental results from the two different rock samples are compared.
Overall, the experimental results indicate that acid jetting follows the same trend as matrix acidizing, regarding wormhole propagation after cavities are created. Jetting velocity and acid flux are the critical parameters in jetting design for optimal stimulation results. Acid jetting tends to create different dissolution patterns for the cores from Indiana limestone and Winterset limestone. The observations from this work highlight the importance of understanding the dynamic physical and chemical process of jetting in the design of successful acid-stimulation jobs.
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Aslam, J. and Al Salat, T. 2000. High-Pressure Water Jetting: An Effective Method to Remove Drilling Damage. Presented at the SPE International Symposium on Formation Damage Control, Lafayette, Louisiana, USA, 23–24 February. SPE-58780-MS. https://doi.org/10.2118/58780-MS.
Bateman, P. C. 1965. Geology and Tungsten Mineralization of the Bishop District California. United States Government Printing Office. Geological Survey Professional Paper. Vols. 470–472.
Beckham, R. E., Shuchart, C. E., and Buechler, S. R. 2015. Impact of Acid Jetting on Carbonate Stimulation. Presented at the International Petroleum Technology Conference, Doha, 6–9 December. IPTC-18360-MS. https://doi.org/10.2523-IPTC-18360-MS.
Buijse, M. A. and Glasbergen, G. 2005. A Semiempirical Model to Calculate Wormhole Growth in Carbonate Acidizing. Presented at the SPE Annual Technical Conference and Exhibition, Dallas, 9–12 October. SPE-96892-MS. https://doi.org/10.2118/96892-MS.
Carpenter, C. 2013. Optimization of Limited-Entry Matrix Acid Stimulations in the Danish Central Graben. J Pet Technol 65 (6). SPE-0613-0096-JPT. https://doi.org/10.2118/0613-0096-JPT.
Denney, D. 2002. Single-Operation Stimulation of 14,000-Ft-Long Reservoir Sections. J Pet Technol 54 (11). SPE-1102-0044-JPT. https://doi.org/10.2118/1102-0044-JPT.
Etten, J., Zhu, D., and Hill, A. D. 2015. The Combined Effect of Permeability and Pore Structure on Carbonate Matrix Acidizing. Presented at the EUROPEC, Madrid, Spain, 1–4 June. SPE-174314-MS. https://doi.org/10.2118/174314-MS.
Fredd, C. N. and Fogler, H. S. 1999. Optimum Conditions for Wormhole Formation in Carbonate Porous Media: Influence of Transport and Reaction. SPE J. 4 (3): 196–205. SPE-56995-PA. https://doi.org/10.2118/56995-PA.
Furui, K., Burton, R., Burkhead, D. et al. 2012. A Comprehensive Model of High-Rate Matrix-Acid Stimulation for Long Horizontal Wells in Carbonate Reservoirs: Part I—Scaling Up Core-Level Acid Wormholing to Field Treatments. SPE J. 17 (1): 271–279. SPE-134265-PA. https://doi.org/10.2118/134265-PA.
Glasbergen, G., Kalia, N., and Talbot, M. S. 2009. The Optimum Injection Rate for Wormhole Propagation: Myth or Reality? Presented at the 8th European Formation Damage Conference, Scheveningen, The Netherlands, 27–29 May. SPE-121464-MS. https://doi.org/10.2118/121464-MS.
Hansen, J. H. and Nederveen, N. 2002. Controlled Acid Jet (CAJ) Technique for Effective Single Operation Stimulation of 14,000+Ft-Long Reservoir Sections. Presented at the European Petroleum Conference, Aberdeen, 29–31 October. SPE-78318-MS. https://doi.org/10.2118/78318-MS.
Holland, C. C. 2014. Experimental High Velocity Acid Jetting in Limestone Carbonates. MS thesis, Texas A&M University, College Station, Texas.
Hung, K. M., Hill, A. D., and Sepehrnoori, K. 1989. A Mechanistic Model of Wormhole Growth in Carbonate Matrix Acidizing and Acid Fracturing. J Pet Technol 41 (1): 59–66. SPE-16886-PA. https://doi.org/10.2118/16886-PA.
Johnson, A., Eslinger, D., and Larsen, H. 1998. An Abrasive Jetting Scale Removal System. Presented at the SPE/ICoTA Coiled Tubing Roundtable, Houston, 15–16 March. SPE-46026-MS. https://doi.org/10.2118/46026-MS.
Kofoed, S. S., Marketz, F., and Krabbenhoeft, J. 2012. Slotted Liner for Continuously Acid Jetting Stimulation. Presented at the IADC/SPE Drilling Conference and Exhibition, San Diego, California, USA, 6–8 March. SPE-151405-MS. https://doi.org/10.2118/151405-MS.
McDaniel, B. W., Marshall, E. J., East, L. E. et al. 2006. CT-Deployed Hydrajet Perforating in Horizontal Completions Provides New Approaches to Multi-Stage Hydraulic Fracturing Applications. Presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, The Woodlands, Texas, USA, 4–5 April. SPE-100157-MS. https://doi.org/10.2118/100157-MS.
Mikhailov, M. 2007. Acid Placement and Coverage in the Acid Jetting Process. MS thesis, Texas A&M University, College Station, Texas.
Mikhailov, M., Zhu, D., and Hill, A. D. 2008. An Experimental Investigation of Drilling-Fluid Filter-Cake Removal by Acid Jetting. Presented at the SPE International Symposium and Exhibition on Formation Damage Control, Lafayette, Louisiana. USA, 13–15 February. SPE-112373-MS. https://doi.org/10.2118/112373-MS.
Panga, M. K. R., Ziauddin, M., and Balakotaiah, V. 2005. Two-Scale Continuum Model for Simulation of Wormholes in Carbonate Acidization. AIChE J. 51 (12): 3231–3248. https://doi.org/10.1002/aic.10574.
Pekarek, J. L., Lowe, D. K., and Huitt, J. L. 1963. Hydraulic Jetting—Some Theoretical and Experimental Results. SPE J. 3 (2): 101–112. SPE-421-PA. https://doi.org/10.2118/421-PA.
Portman. L., Rae, P., and Munir, A. 2002. Full-Scale Tests Prove It Practical to Drill Holes With Coiled Tubing Using Only Acid; No Motor, No Bits. Presented at the SPE/ICoTA Coiled Tubing Conference and Exhibition, Houston, 9–10 April. SPE-74824-MS. https://doi.org/10.2118/74824-MS.
Schechter, R. S. 1992. Oil Well Stimulation. Englewood Cliffs, New Jersey: Prentice Hall.
Siddiqui, M. A., Sharma, S. S., Al-Ajmi, M. F. et al. 2013. Enhancement of Oil Production From an Old Well in Thin Carbonate Reservoir Through Acid Tunneling—A Case Study. Presented at the EAGE Annual Conference and Exhibition Incorporation SPE Europe, London, 10–13 June. SPE-164876-MS. https://doi.org/10.2118/164876-MS.
Stanley, F. O., Portman, L. N., Diaz, J. D. et al. 2010. Global Application of Coiled-Tubing Acid Tunneling Yields Effective Carbonate Stimulation. Presented at the SPE Annual Technical Conference and Exhibition, Florence, Italy, 19–22 September. SPE-135604-MS. https://doi.org/10.2118/135604-MS.
Surjaatmadja, J. B., Bezanson, J., Lindsay, S. D. et al. 2008. New Hydra-Jet Tool Demonstrates Improved Life for Perforating and Fracturing Applications. Presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, The Woodlands, Texas, USA, 1–2 April. SPE-113722-MS. https://doi.org/10.2118/113722-MS.
Teikoku USA Inc. Chempump. 2014. Chem/Meter 800 Series. http://www.chempump.com/images/technical_literature/chem_meter/brochures/800series-02.pdf (accessed 8 January 2014).
Wang, Y., Hill, A. D., and Schechter, R. S. 1993. The Optimum Injection Rate for Matrix Acidizing of Carbonate Formations. Presented at the SPE Annual Technical Conference and Exhibition, Houston, 3–6 October. SPE-26578-MS. https://doi.org/10.2118/26578-MS.
Zakaria, A. S., Nasr-El-Din, H. A., and Ziauddin, M. 2015. Predicting the Performance of the Acid-Stimulation Treatments in Carbonate Reservoirs With Nondestructive Tracer Tests. SPE J. 20 (6): 1238–1253. SPE-174084-PA. https://doi.org/10.2118/174084-PA.
Zhang, Y. 2009. Experimental Study of Filter Cake Cleanup by Acid/Water Jetting. MS thesis, Texas A&M University, College Station, Texas.
Ziauddin, M. and Bize, E. 2007. The Effect of Pore Scale Heterogeneities on Carbonate Stimulation Treatments. Presented at the SPE Middle East Oil and Gas Show and Conference, Manam, Bahrain, 11–14 March. SPE-104627-MS. https://doi.org/10.2118/104627-MS.