Aften C.W.,ChemEOR, Inc.
SPE Eastern Regional Meeting | Year: 2014
Rheological experiments have been conducted with commercial and experimental friction reducers indicating certain profiles are advantageous for performance. In these profiles the factors of time and concentration are important in predicting the maximum performance window. These windows become apparent without the use of sophisticated rheological instrumentation. The viscosity profile of a friction reducer is dependent on factors such as polymer charge, charge distribution, molecular weight, polymer concentration, solvent properties, specific shear rate and time. Often it is difficult to measure properties such as molecular weight and viscosity, both quite sensitive to the specific test method and many assumptions are made. In this study, the viscosity of the system depends on the shear history, concentration, and time of measurement. Most traditional viscosity methods assume a thermodynamic definition of polymer configuration. This assumption is valid for measurement of friction reduction after significant duration. However, in a hydraulic fracture, this time may not be realized during the volumetric transfer of the fluid from the pumps to the perforations. In a recirculating friction loop measurement, the friction reduction performance of an ideal candidate rapidly increases and then sometimes diminishes with recirculation time. A possible correspondence between this phenomenon can be linked to the measurement conducted in this study. Shear rate sweeps were conducted on a variety of synthetic polymers with a Couette rheometer and a microchip rheometer. Variables studied were polymer type, concentration, shear history, time, solvent, make-down procedure, and atmosphere. Both inverse emulsion and dry friction reducers were studied. Friction reduction was measured on a once through system. From this study, ideal friction reducer candidates can be selected by simply and rapidly examining the rheological profile and rheological nuances realized when conducting the measurements. When choosing an ideal friction reducer, it must perform rapidly and maintain the necessary friction reduction required for the time frame needed. Copyright 2014, Society of Petroleum Engineers. Source
ChemEOR, Inc. | Date: 2016-03-01
Chemicals for use in the field of oil exploration and production; Chemicals for use in the field of natural gas exploration and production; Chemical products for the production of oil and natural gas.
Agency: National Science Foundation | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 130.05K | Year: 2011
This Small Business Innovation Research (SBIR) Phase I project will develop a new class of environmentally-friendly and sustainable biopolymer-based chemistries that can be modified and applied in oil and gas production operations. These new chemistries take advantage of the availability of natural polymers such as guar as a feedstock. It already has been demonstrated that guar and other biopolymers may be modified by adding other chemical groups to create ?green? polymer molecules with a broader range of solution properties. These may include the ability to have a self-thickening or gelling effect. Such fluids are applied in oil and gas wells to block selectively movement of subsurface water, thereby increasing hydrocarbon production. This sustainable technology would replace a competing chemical method based on using (not green) synthetic polymers. The broader/commercial impacts of this research are research breakthroughs that will have immediate and profound commercial potential for the target application of increasing the volume of oil produced in mature oil fields. The DOE estimates these fields in the U.S. have over 350 billion barrels of oil remaining in place that is not now recoverable economically. A new method that will produce some of this trapped oil cheaply with an environmentally-friendly chemical will be extremely attractive to the domestic energy industry. Besides the immediate target application for the oil and gas industry, the same types of new environmentally-friendly chemistries should find uses in other industries.
ChemEOR, Inc. | Date: 2014-09-16
Compositions and dispersions comprising hydrophobically modified polyacrylamide (HMPAM) or associative polymers and small particles useful in hydrocarbon recovery and enhanced oil recovery processes using the same. Non-limiting embodiments include those using metal oxide small particles, including fumed silica having primary particles in the nanoparticle size range.
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 97.50K | Year: 2010
Tapping into additional oil supplies within the nation's oil wells for smaller producers in mature production can be an important contributor to U.S. energy security. Excess water production which, when accompanied by low oil production, results in wells becoming unprofitable to operate and leads to early well abandonment and a large percent of the original oil in place never being produced. . This project will develop a new chemical technology to increase the rate of oil production and recovery from such mature oil fields in the U.S. This technology is based on unique single-component chemical products that when added to brines will self-thicken over time inside the reservoir. Such low-cost chemical solution treatments will block selectively flow in already watered-out channels in the oil reservoir. The normal injection water that follows such a treatment will be diverted into oil-rich areas of the reservoir previously not swept by this water and thus recover additional oil. This same concept may be applied in production wells to reduce water production. Commercial Applications and Other Benefits: This new technology is targeted to be a low-cost treatment that is highly efficient in increasing oil recovery and so as have a favorable economic payout for the incremental oil recovered. An additional benefit of this process is that the volume of salt water lifted with the oil is reduced significantly, thereby reducing environmental impact and fluid handling costs