Joint Industry Project: Sustainable Hydrocarbon Recovery in Unconventional
Reservoirs
Thrust Area 1: Produced Water Treatment
The University
of Kansas’ (KU) Civil, Environmental,
and Architectural Engineering Department (CEAE) and
Tertiary Oil Recovery Program (TORP)
have joined together to build a team of researchers dedicated to
developing sustainable energy
approaches and protecting our nation’s water resources.
Principal Investigator (PI):
Dr. Karen Peltier
(TORP) (kpeltier@ku.edu, 785-864-2912)
Co-PIs:
Dr. Steve Randtke (CEAE) (srandtke@ku.edu),
Dr. Belinda Sturm (CEAE) (bmcswain@ku.edu)
Dr. Edward Peltier (CEAE) (epeltier@ku.edu)
Team:
post-doctoral associate (1), field liaison engineer (1)
Projects
The goal of
KU’s produced water treatment research is to develop new, economical methods for
treating water focusing on gaps in current technology. Two key targets have been
identified and are listed below. By listening to our partner’s needs and
learning from their expertise, we intend to grow these areas and develop new
ones, accelerating technology development and solving problems.
1.
Removal of
naturally occurring radioactive materials (NORMs) and scale-causing minerals
using nanotechnology
Polyelectrolyte complex (PEC) systems have been used extensively for the
encapsulation of chemicals, primarily to protect nanosized packets in harsh
environments prior to release.
These complexes have been widely implemented in drug delivery schemes by
pharmaceutical companies. TORP has
successfully developed PECs for oilfield applications, including the entrapment
of chemicals as disparate as enzymes and
chromium ions.
The goal of
this research is to develop new PECs capable of entrapping strontium, barium,
and radium cations in produced wate. Due to their chemical similarities (all are
alkaline earth metals in Group 2 of the periodic table, although only radium is
radioactive in its naturally occurring form), similar PEC formulations can be
developed to entrap all three metals. Once the PEC is formed around the metal
cation, depending on its size and electrostatic properties, it will either
settle out or can be easily filtered. Because PECs are simple to use, produce a
small volume of sludge, and can be regenerated for reuse once they have been
separated from the produced water, they could be significantly more economical
than current water treatment techniques when it comes to scale prevention
(strontium and barium) and radionuclide (radium) removal.
2.
Application of fluidized bed biological reactors for organics removal
In wastewater treatment, fluidized bed reactors are used to increase contact
between chemical contaminants and reactor components, speeding up reaction rates
and enabling the processing of large volumes in less space. Typically, a fluid,
in our case produced water, is passed through a granular solid material at high
speeds such that the solid material is mobilized. This material can be an ion
exchange resin, activated carbon, or even a biofilm deposited on a substrate.
The choice of solid component depends on the contaminant being targeted.
Research will focus on the removal of organic carbon species found in produced
water, including dispersed oil, production chemicals such as surfactants and
polymers, and production solids, which cause fouling. Microbes suited for
breaking down produced water organic components in the presence of high salinity
can be grown on support materials to form biofilms and used in fluidized bed
bioreactors to break down organic materials by converting them into smaller,
more manageable compounds. By using a fluidized bed reactor design, we will
maximize the reaction efficiency between the biofilm and the produced water
enabling the continuous processing of produced water.
Removal of organic chemicals is particularly important if saline produced waters
are to be processed through membrane treatment for desalination and reuse.
In membrane filtration units, suspended or dissolved organic compounds
contribute to membrane fouling, decreased fluxes, and increased operating costs.
Benefits to industry
·
Strong track
record with industry-focused research.
·
Access to
faculty and researchers who are experts in their field.
·
Opportunities
to meet students actively engaged in research, trained by a solid community of
faculty and support staff with industry training and who value industry
sponsored projects.
·
Extensive
experience working with Kansas-area producers to perform field tests.
·
Fully equipped
laboratories.
Experience
By bringing
together CEAE faculty members and TORP researchers, KU has created a
cross-disciplinary team that understands both water quality issues and the needs
of the oil and gas industry.
The project
team includes CEAE faculty with extensive experience with the water quality
concerns associated with hydraulic fracturing fluids and produced water,
including a member of the Hydraulic Fracturing Research Advisory Panel of the
U.S. E.P.A.’s Science Advisory Board. Specific areas of expertise include:
·
Physical/chemical water treatment processes including coagulation, chemical
precipitation, adsorption, oxidation, and membrane separation processes,
especially with respect to their use in removing trace contaminants
·
Analysis,
removal, and speciation of metals in aqueous and solid-phase systems, including
advanced analytical techniques to determine metal concentrations and speciation
in contaminated soils and wastewater biosolids.
·
Biological
processes of wastewater treatment, bioreactor operation, and the application of
molecular methods in water quality analysis.
·
Characterization of microbial communities, including those recovered from oil
wells in the Wellington Oil Field (KS)
TORP has 40
years of experience serving the needs of the oil and gas industry in Kansas and
beyond, performing improved oil recovery research in the lab and in the field.
TORP’s ability to listen and meet industry’s needs has resulted in multiple
technologies being commercialized through joint development agreements with
industry sponsors.
Key Personnel
Dr. Karen Peltier, the Principal Investigator, is an Assistant Scientist and Director of Laboratories for the Tertiary Oil Recovery Program at the University of Kansas (KU). Prior to joining TORP in September 2009, Dr. Peltier was a program manager at Midwest Research Institute (now MRIGlobal). She has fourteen years of analytical chemistry research experience, working on method development in both industry and academic settings for the detection of trace chemicals |
Dr. Stephen Randtke, a Co-Principal Investigator, is an environmental engineering professor in the Department of Civil, Environmental, and Architectural Engineering at KU, with over 40 years of experience in the field of environmental engineering with a primary focus on water quality and treatment. He currently serves on the Hydraulic Fracturing Research Advisory Panel of the U.S. EPA’s Science Advisory Board and is familiar with the water quality concerns associated with hydraulic fracturing fluids and produced water. |
Dr. Belinda Sturm, a Co-Principal Investigator, is an environmental engineering associate professor in the Department of Civil, Environmental & Architectural Engineering at KU. She specializes in biological processes of wastewater treatment, bioreactor operation, and the application of molecular methods in water quality analysis. Dr. Sturm has also worked with the oil industry in Kansas investigating microbial communities recovered from several wells in the Wellington Oil Field. |
Dr. Edward Peltier, a Co-Principal Investigator, is an environmental engineering associate professor in the Department of Civil, Environmental & Architectural Engineering at KU, with expertise in the fate and transformations of environmental contaminants in natural and engineered systems. He has extensive research experience in the analysis, removal and speciation of metals in both aqueous and solid-phase systems, including the use of advanced analytical techniques to determine metal concentrations and speciation in contaminated soils, wastewater biosolids, and diesel exhaust particulates. |
The Environmental Engineering laboratory facilities occupy approximately 3,000
sq. ft. in three separate laboratories; the Environmental Research Laboratory
(ERL), the Sustainable Technologies Laboratory (STL), and the Environmental
Instrument Laboratory (EIL), which are seaparated for quality control purposes.
The ERL includes the space and equipment necessary to perform chemical and
biological experiments, including bench-scale fluidized bed reactor operations.
The STL includes additional sample preparation and experiment space.
The EIL houses analytical equipment for the detection of chemical and biological
constituents of environmental systems. These labs are supplemented by
TORP’s
research facilities which occupy approximately 4,000 sq. ft. TORP’s laboratories
are equipped to perform many aspects of oil recovery research, including
analytical instruments specific to oil and gas research and anaerobic chambers
for oxygen-free studies.
Combined, these labs are equipped with the following instrumentation:
Target Analytes/Properties |
Analytical Techniques |
Instrument(s) Available |
Basic chemical and physical properties of water (pH, temperature,
alkalinity, conductivity, TDS, density, and major ion composition),
oil (viscosity), and gels (rheology) |
Standard Methods |
Analytical balances, pH meters (with temperature probe),
conductivity meters, titrators, ion chromatograph, atomic absorption
or flame photometer, densitometer, viscometers, rheometers |
Particle size distribution and zeta potential of PECs |
Laser light scattering |
Particle sizer and zeta potential analyzer (dynamic light scattering
and phase analysis light scattering) |
PECs, minerals, metals, corrosion and scale products, sulfides |
Elemental analysis including Ba, Sr, Ra analysis |
ICP-OES, ICP-MS, Atomic Absorption, Elemental Analyzer (CHNS,-O),
scintillation counter |
Dispersed oil, production chemicals, dissolved gases, waxes, organic
carbon and nitrogen |
Gas Chromatography (GC),
Total Organic Carbon/
Total Nitrogen (TOC/TN) Optical Spectroscopy |
GC-FID, GC-TCD, GC-MS-MS, TOC/TN Analyzer
FTIR, UV-Vis, Raman |
Production chemicals |
Liquid Chromatography (LC) |
HPLC-ELSD, HPLC-UV-Vis |
PEC and mineral sample structure |
Microscopy |
Optical Microscopy, Fluorescence Microscopy, TEM, SEM |