TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractIn fracturing applications, addition of the Relative Permeability Modifiers (RPM's) to water base fracturing fluids, preferably to pre-pad and pad stages, can provide multiple potential treatment enhancement benefits. The RPM may reduce post-stimulation water production, and increase fracturing fluid efficiency. RPM's may also pump as a postfracturing treatment at matrix rates following load recovery. After the RPM treatment in an oil well, hydrocarbon solvents compatible with the hydrocarbon-bearing interval compose the recommended flush solutions. These solvents may include aromatic solvents such as xylene, diesel or mixtures of diesel and aromatic solvent. This flush is designed to reconnect the hydrocarbon reserves to the wellbore in an effort to accelerate return of oil production. In this application, the diesel base frac fluid accomplished this function.In water sensitive hydrocarbon bearing is desirable to avoid excessive use of water base fluids. Good results are obtained using oil base fracturing fluids. However, RPM's cannot be added directly to oil base fluids. To address this issue, an unconventional method was proposed and executed with successful results. Prior to the propped frac treatment, a water base frac fluid with RPM polymer is pumped at fracturing rates, with a volume calculated to occupy the formation with an equivalent fracture geometry slightly larger than the expected created geometry of the subsequent propped oil/solvent based frac fluid treatment. This paper describes guidelines for candidate selection for this application, analysis and logs to optimize treatments, advantages obtained with this method, and case histories in a Colombian field. The RPM used is a synthetic ter-polymer based on acrylamide chemistry.
TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractProppant flowback within shallow wells, as with all wells, can be a significant problem in the oil and gas industry. Under the typical low-stress and low-temperature conditions found in shallow formations, many of the current products and processes to control proppant flowback often fail or have only limited success. As such, improved or alternative technology and procedures are constantly being sought. One such technology is the development of a deformable proppant for use under low closure stress conditions. Laboratory testing of this 'low-stress' (LS) deformable proppant, blended with typical fracturing sand, has shown 20 fold increases in flowrate and 10 fold increases in pressure-drop are attainable without proppant pack failure, while still maintaining or in some cases increasing fracture conductivity.Furthermore, this 'low-stress' (LS) deformable proppant has been successfully applied in shallow reservoirs with typical closure stresses +/-500 psi and bottom-hole temperatures of +/-100°F. Several case histories, along with the development of equipment and monitoring procedures required to facilitate field application will be discussed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.