Field Treatment To Stimulate a Deep, Sour, Tight-Gas Well Using a New, Low Corrosion and Environmentally Friendly Fluid
- Hisham A. Nasr-El-Din (Texas A&M University) | Corine A. de Wolf (Fangmann Energy Services) | Theo Stanitzek (Fangmann Energy Services) | Alan K. Alex (Fangmann Energy Services) | Steffan Gerdes (Fangmann Energy Services) | Nils R. Lummer (Fangmann Energy Services)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- June 2013
- Document Type
- Journal Paper
- 277 - 285
- 2013. Society of Petroleum Engineers
- 4.2.3 Materials and Corrosion, 2.5.2 Fracturing Materials (Fluids, Proppant), 2 Well completion, 5.8.1 Tight Gas, 4.1.2 Separation and Treating, 5.2 Reservoir Fluid Dynamics, 3.2.4 Acidising
- 8 in the last 30 days
- 499 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 12.00|
|SPE Non-Member Price:||USD 35.00|
Matrix acidizing of high-temperature gas wells is a difficult task, especially if these wells are sour or if they are completed with high-chrome-content tubulars. These harsh conditions require high loadings of corrosion inhibitors and intensifiers in addition to hydrogen sulfide scavengers and iron control agents. Selection of these chemicals to meet the strict environmental regulations adds to the difficulty in dealing with such wells. Recently, a new environmentally friendly chelating agent, glutamic acid-diacetic acid (GLDA), has been developed and extensively tested for carbonate and sandstone formations. Significant permeability improvements have been shown in previous papers over a wide range of conditions. In this paper, we evaluate the results of the first field application of this chelating agent to acidize a sour, high-temperature, tight gas well completed with high-chrome-content tubulars.
Extensive laboratory studies were conducted before the treatment, including corrosion tests, coreflood experiments, compatibility tests with reservoir fluids, and reaction-rate measurements using a rotating disk apparatus. The treatment started by pumping a preflush of mutual solvent and water-wetting surfactant, followed by the main stage consisting of 20 wt% GLDA with a low concentration of a proper corrosion inhibitor. Following the treatment, the well was put on production, and samples of flowback fluids were collected. The concentrations of various ions were determined using ICP. Various analytical techniques were used to determine the concentration of GLDA and other organic compounds in the flowback samples.
The treatment was applied in the field without encountering any operational problems. A significant increase in gas production that exceeded operator expectations was achieved. Unlike previous treatments where hydrochloric acid (HCl) or other chelates were used, the concentrations of iron, chrome, nickel, and molybdenum in the flowback samples were negligible, confirming low corrosion of well tubulars. Improved productivity and longer-term performance results confirm the effectiveness of the new chelate as a versatile stimulation fluid.
|File Size||882 KB||Number of Pages||9|
Adenuga, O., Sayed, M.A., and Nasr-El-Din, H.A. 2013. Reactionsof Simple Organic Acids and Chelating Agents with Dolomite. Paper SPE 164480presented in the SPE Production and Operations Symposium, Oklahoma City,Oklahoma, USA, 23-26 March.
Boles, J.L., Ke, M., and Parker, C. 2009. Corrosion Inhibitionof New 15 Chromium Tubulars in Acid Stimulation Fluids at High Temperatures.Presented at the SPE Annual Technical Conference and Exhibition, New Orleans,4-7 October. SPE-124887-MS. http://dx.doi.org/10.2118/124887-MS.
Braun, W., De Wolf, C., and Nasr-El-Din, H.A. 2012. ImprovedHealth, Safety and Environmental Profile Of A New Field Proven StimulationFluid. Presented at the SPE Russian Oil and Gas Exploration and ProductionTechnical Conference and Exhibition, Moscow, 16-18 October. SPE-157467-MS. http://dx.doi.org/10.2118/157467-MS.
De Wolf, C., Nasr-El-Din, H.A., Bouwman, A. et al. 2012. A New,Low Corrosive Fluid To Stimulate Deep Wells Completed With Cr-based Alloys.Presented at the SPE International Conference and Exhibition on OilfieldCorrosion, Aberdeen, 28-29 May. SPE-152716-MS. http://dx.doi.org/10.2118/152716-MS.
Fredd, C.N. and Fogler, H.S. 1997. Chelating Agents asEffective Matrix Stimulation Fluid for Carbonate Formations. Presented at theInternational Symposium on Oilfield Chemistry, Houston, 18-21 February.SPE-37212-MS. http://dx.doi.org/10.2118/37212-MS.
Fredd, C.N. and Fogler, H.S. 1998. The influence of chelatingagents on the kinetics of calcite dissolution. J. Colloid Interface Sci. 204 (1): 187-197. http://dx.doi.org/10.1006/jcis.1998.5535.
Frenier, W.W., Brady, M., Al-Harthy, S. et al. 2004. Hot Oil and Gas WellsCan Be Stimulated Without Acids. SPE Prod & Fac 19 (4):189-199. SPE-86522-PA. http://dx.doi.org/10.2118/86522-PA.
Frenier, W.W., Fredd, C.N., and Chang, F. 2001.Hydroxyaminocarboxylic Acids Produce Superior Formulations for MatrixStimulation of Carbonates at High Temperatures. Presented at the SPE AnnualTechnical Conference and Exhibition, New Orleans, 30 September-3 October.SPE-71696-MS. http://dx.doi.org/10.2118/71696-MS.
Frenier, W.W., Rainey, M., Wilson, D. et al. 2003. ABiodegradable Chelating Agent is Developed for Stimulation of Oil and GasFormations. Presented at the SPE/EPA/DOE Exploration and ProductionEnvironmental Conference, San Antonio, Texas, USA, 10-12 March. SPE-80597-MS.http://dx.doi.org/10.2118/80597-MS.
LePage, J., Wolf, C.D., Bemelaar, J. et al. 2011. AnEnvironmentally Friendly Stimulation Fluid for High-Temperature Applications.SPE J. 16 (1): 104-110. SPE-121709-PA. http://dx.doi.org/10.2118/121709-PA.
Mahmoud, M.A., Nasr-El-Din, H.A., De Wolf, C. et al. 2011a.Optimum Injection Rate of A New Chelate That Can Be Used To Stimulate CarbonateReservoirs. SPE J. 16 (4): 968-980. SPE-133497-PA. http://dx.doi.org/10.2118/133497-PA.
Mahmoud, M.A., Nasr-El-Din, H.A., De Wolf, C. et al. 2011b.Evaluation of a New Environmentally Friendly Chelating Agent forHigh-Temperature Applications. SPE J. 16 (3): 559-574.SPE-127923-PA. http://dx.doi.org/10.2118/127923-PA.
Nasr-El-Din, H.A., De Wolf, C., Bouwman, A. et al. 2012. A New,Low Corrosive Fluid to Stimulate Wells with Carbon Steel Tubular and Internals.Presented at the SPE Saudi Arabia Section Technical Symposium and Exhibition,Al-Khobar, Saudi Arabia, 8-11 April. SPE-160849-MS. http://dx.doi.org/10.2118/160849-MS.
Rabie, A., Mahmoud, M.A., and Nasr-El-Din, H.A. 2011. Reactionof GLDA with Calcite: Reaction Kinetics and Transport Study. Presented at theSPE International Symposium on Oilfield Chemistry, The Woodlands, Texas, USA,11-13 April. SPE-139816-MS. http://dx.doi.org/10.2118/139816-MS.
Sokhanvarian, K., Nasr-El-Din, H.A., Wang, G. et al. 2012.Thermal Stability of Various Chelates That Are Used In The Oilfield AndPotential Damage Due To Their Decomposition Products. Presented at the SPEInternational Production and Operations Conference & Exhibition, Doha,Qatar, 14-16 May. SPE-157426-MS. http://dx.doi.org/10.2118/157426-MS.