PPG Project
Project Overview
Field Applications
Presentations
Project Reports
Publications
Research Group Members
Links
Dr Bai's Homepage
RPSEA Website
DOE Website
Contact
|
Executive Summary of the
Project
Excess water
production is a major issue that leads to early well abandonment and
unrecoverable hydrocarbon for mature wells. Gel treatments at injection
wells
to plug off preferentially the water thief zones are a proven
cost-effective
method to improve sweep efficiency in reservoirs and reduce excess
water
production during hydrocarbon production. A newer trend in gel
treatments uses
preformed particle gels (PPG) to overcome some distinct drawbacks
inherent in
in-situ gelation systems. This proposal will study gel particle
transport
through fractures and fracture-like channels. The ultimate purpose of
the
project is to establish methods to optimize particle gel treatments to
increase
oil recovery plus reduce water production, by improving waterflood
sweep
efficiency. This has direct economic benefits by increasing income and
saving
routine operating costs, plus a reduction in the water production rate
serves
to decrease the associated environmental risks and impact of any
spills.
The proposed
project has four main tasks. The objective of the first task is to
identify
where particle gels can be effective and how to best use them. This
task will done
via analysis of previous field data using our developed theories and
modern
soft-computing technologies The second task will quantify particle gel
propagation for different PPG products during extrusion through open
fractures
and fracture-like channels; results will thereby guide the best
particle gels
for different widths fracture and channels. This task will be fulfilled
through
experiments using screens and cores with fractures and channels. New
theoretical models will be developed based on the experiment data and
will be
used to update the models of the first task for better design of
particle gel
treatments and prediction of well performance. The third task will be
laboratory flow tests to evaluate novel processes (e.g. modified PPG
chemistry,
including surfactant, and using gravity effects to improve particle
placement)
that have significant potential to enhance gel particle treatment
efficiency. The fourth task is to
develop well size-distributed commercial
preformed gel particles.
The project will
be led by the research group at the Missouri University of Science and Technology. The
fourth task is the procurement and synthesis of commercial and newly
developed
PPG chemistries, which will be provided by ChemEOR, a chemical product
provider
in the USA.
Another key activity is the interactive consultation from BJ Services
who would
take the results from this study and provide the actual field
deployment of PPG
technology to small producer end users. BJ Services will provide expert
guidance so that the field data analysis and laboratory program tasks
will generate
information that will be key towards faster deployment of PPG
technology to
domestic small producers.
|