Development of Chelating Agent-Based Polymeric Gel System for Hydraulic Fracturing

Hydraulic Fracturing is considered to be one of the most important stimulation methods. Hydraulic Fracturing is carried out by inducing fractures in the formation to create conductive pathways for the flow of hydrocarbon. The pathways are kept open either by using proppant or by etching the fracture surface using acids. A typical fracturing fluid usually consists of a gelling agent (polymers), cross-linkers, buffers, clay stabilizers, gel stabilizers, biocide, surfactants, and breakers mixed with fresh water. The numerous additives are used to prevent damage resulting from such operations, or better yet, enhancing it beyond just the aim of a fracturing operation. This study introduces a new smart fracturing fluid system that can be either used for proppant fracturing (high pH) or acid fracturing (low pH) operations in sandstone formations. The fluid system consists of glutamic acid diacetic acid (GLDA) that can replace several additives, such as cross-linker, breaker, biocide, and clay stabilizer. GLDA is also a surface-active fluid that will reduce the interfacial tension eliminating the water-blockage effect. GLDA is compatible and stable with sea water, which is advantageous over the typical fracturing fluid. It is also stable in high temperature reservoirs (up to 300 °F) and it is also environmentally friendly and readily biodegradable. The new fracturing fluid formulation can withstand up to 300 °F of formation temperature and is stable for about 6 h under high shearing rates (511 s −1 ). The new fracturing fluid formulation breaks on its own and the delay time or the breaking time can be controlled with the concentrations of the constituents of the fluid (GLDA or polymer). Coreflooding experiments were conducted using Scioto and Berea sandstone cores to evaluate the effectiveness of the developed fluid. The flooding experiments were in reasonable conformance with the rheological properties of the developed fluid regarding the thickening and breaking time, as well as yielding high return permeability.

[1]  S. Elkatatny,et al.  Stimulation of Seawater Injectors by GLDA (Glutamic-Di Acetic Acid) , 2016 .

[2]  M. S. Alnarabiji,et al.  Empirical modeling of the viscosity of supercritical carbon dioxide foam fracturing fluid under different downhole conditions , 2018 .

[3]  A. Sultan,et al.  Understanding viscosity reduction of a long-tail sulfobetaine viscoelastic surfactant by organic compounds , 2018 .

[4]  M. R. Hashmet,et al.  Viscosity models for polymer free CO2 foam fracturing fluid with the effect of surfactant concentration, salinity and shear rate , 2017 .

[5]  Satish Karra,et al.  Shale gas and non-aqueous fracturing fluids: Opportunities and challenges for supercritical CO2 , 2015 .

[6]  M. S. Kamal,et al.  High molecular weight copolymers as rheology modifier and fluid loss additive for water-based drilling fluids , 2018 .

[7]  M. Honarpour,et al.  Imbibition and Water Blockage In Unconventional Reservoirs: Well-Management Implications During Flowback and Early Production , 2014 .

[8]  Chong Lin,et al.  An Experimental Investigation of Hydraulic Fracturing in Shale Considering Anisotropy and Using Freshwater and Supercritical CO2 , 2018 .

[9]  Jinzhou Zhao,et al.  High Performance Clean Fracturing Fluid Using a New Tri-Cationic Surfactant , 2018, Polymers.

[10]  D. B. Bennion,et al.  Determination of True Effective In Situ Gas Permeability in Subnormally Water-Saturated Tight Gas Reservoirs , 2004 .

[11]  Yujing Jiang,et al.  Hydraulic properties of 3D crossed rock fractures by considering anisotropic aperture distributions , 2018 .

[12]  Jennifer L. Miskimins,et al.  The Water Blockage Effect on Desiccated Tight Gas Reservoir , 2014 .

[13]  M. S. Kamal,et al.  Rheological and thermal properties of novel surfactant‐polymer systems for EOR applications , 2016 .

[14]  N. Gaillard,et al.  Novel Associative Acrylamide-based Polymers for Proppant Transport in Hydraulic Fracturing Fluids , 2013 .

[15]  Pathegama Gamage Ranjith,et al.  Experimental study of matrix permeability of gas shale: An application to CO2-based shale fracturing , 2018 .

[16]  Jun Li,et al.  New Method to Analyse the Cement Sheath Integrity During the Volume Fracturing of Shale Gas , 2018 .

[17]  H. Nasr-El-Din,et al.  High-Temperature Laboratory Testing of Illitic Sandstone Outcrop Cores With HCl-Alternative Fluids , 2015 .

[18]  Z. Ouled Ameur,et al.  Stimulation of High Temperature SAGD Producer Wells Using a Novel Chelating Agent (GLDA) and Subsequent Geochemical Modeling Using PHREEQC , 2015 .

[19]  David L. Lord,et al.  Borate-crosslinked fluid rheology under various pH, temperature, and shear history conditions , 1997 .

[20]  M. S. Kamal,et al.  A Zwitterionic Surfactant Bearing Unsaturated Tail for Enhanced Oil Recovery in High‐Temperature High‐Salinity Reservoirs , 2018 .

[21]  A. Samsuri,et al.  Viscoelastic surfactants application in hydraulic fracturing, it's set back and mitigation - an overview , 2014 .

[22]  H. Nasr-El-Din,et al.  Sandstone Acidizing Using A New Class of Chelating Agents , 2011 .

[23]  R. Prud’homme,et al.  Rheology of Guar and HPG Cross-Linked by Borate , 1992 .

[24]  A. Verma,et al.  Rheological and breaking studies of a novel single-phase surfactant-polymeric gel system for hydraulic fracturing application , 2018, Journal of Petroleum Science and Engineering.

[25]  F. Nabhani,et al.  Modeling the Risk of Commercial Failure for Hydraulic Fracturing Projects Due to Reservoir Heterogeneity , 2018 .

[26]  Alfred R. Jennings,et al.  Fracturing fluids -- then and now , 1996 .

[27]  G. Funkhouser,et al.  A Crosslinkable Synthetic-Polymer System for High-Temperature Hydraulic-Fracturing Applications , 2010 .

[28]  G. Waters,et al.  Viscoelastic Surfactant Fracturing Fluids: Applications in Low Permeability Reservoirs , 2000 .

[29]  Yichi Zhang,et al.  Coupled Thermo-Hydro-Mechanical-Chemical Modeling of Water Leak-off Process during Hydraulic Fracturing in Shale Gas Reservoirs , 2017 .

[30]  M. S. Kamal,et al.  Rheological and filtration properties of clay-polymer systems: Impact of polymer structure , 2018, Applied Clay Science.

[31]  Comparing the effects of Breakers on a Long-Tail Sulfobetaine Viscoelastic Surfactant Solution for Well Stimulation , 2016 .

[32]  S. Holditch.  Tight Gas Sands , 2006 .

[33]  Hisham A. Nasr-El-Din,et al.  Improved Health, Safety and Environmental Profile Of A New Field Proven Stimulation Fluid (Russian) , 2012 .

[34]  Jianjun Liu,et al.  A review on hydraulic fracturing of unconventional reservoir , 2015 .