Sample Background of the Study Impact of Injection Well Fractures on Well Injectivity and Reservoir Sweep in Water Flooding and Enhanced Oil Recovery
Impact
of Injection Well Fractures on Well Injectivity and Reservoir Sweep in Water
Flooding and Enhanced Oil Recovery
Study Background
Most water injection wells
in waterflooded reservoirs have fractures that increase as the time passes.
These fractures can have a considerable effect on the reservoir performance. Moreover, a single well model that predicts
the length of injection well fractures by modeling fracture growth due to
fracture face plugging and thermal stresses is coupled with a reservoir simulator
to simulate injection wells that have fractures that dynamically grow with time
(Neretnieks, 2007). The relative importance of the injected water quality,
formation permeability, injection rate and the temperature of injected water on
the rate of fracture growth are demonstrated. The single well model accurately
accounts for all the physics of fracture growth at the injector while the
reservoir simulator accounts for the large-scale reservoir structure (Kohl,
Evans, Hopkirk, & Rybach 1995).
Waterflooding
is the most extensively used improved oil recuperation process. Injection of
sea and surface water is widespread in established fields (Neretnieks, 2007).
Water injection is also used for pressure preservation. Most water injection
wells have fractures that increase as time passes. Fractures can be commenced
in injection wells due to thermal stresses, transformations in pore pressure
and an increase in injection pressure because of particulate plugging. These
fractures may have a significant impact on the reservoir performance
(Neretnieks, 2007). Unlimited fracture growth can have a number of undesirable effects.
The occurrence of mounting high permeability fractures in the injectors
distorts the water flood fronts. Depending on the position of the injection
wells, this may result in poor sweep efficiency and consequently in premature
water breakthrough. Unconstrained growth of fractures can join water and
hydrocarbon bearing zones. Basically, an important factor to be considered here
is that most injection wells fracturing is induced during the course of
injection and these fractures grow with time.
Technical Objectives
While the
research questions only refer to the information that the researcher intended
to question. The objectives, however, will focus on the necessary problems and
objectives that should be clarified in order to gather the intended information
and also be able to derive specific information that are not limited by the
previous questions. With these objectives, the study will be able to attain the
necessary information that can help derive further conclusions and proper
recommendations. The study intends to evaluate the impact of injection well fractures
on well injectivity and reservoir sweep in waterflooding and enhanced oil recovery. The study intends to get the appropriate data to help in
making the proper assessment. There
are other aims and objectives of the study. This includes:
- To
determine the impact of injection well fractures on well injectivity and reservoir
sweep in waterflooding.
- To
develop a single well model that will predict the fracture increase in
injection wells due to thermal and pore pressure effects and particle
plugging.
- To
determine the relationship of injection well fractures and enhancement of
oil recovery.
- To
identify the significant effect of injection well fractures to enhancement
of oil recovery.
Expected Outcomes
The
study will initially gather information that will serve as introductory part of
the study. These kind of information helps the reader what the study is about,
what it intends to do and what will be its result. The study will then gather
related literature to prove the need for conducting the study. The literature
review can help in determining what are the studies already done, what study
needs to be corrected. The study will then determine the methods and means for
data to be gathered and analyzed. In this part the data is being readied to be
gathered and analyzed but the method to gather it will first be determined. The next part of the study is gathering,
presenting and interpreting the data. In this part the validity of the
hypothesis and ideas about the study will be proven. The last part of the study
will be the part where conclusions and recommendations will be stated. In this
part final statement about the study will be done.
Methodology
The
main forms of primary research that are to be carried out will involve
information collected from interviews, questionnaires both physical and
electrical i.e. by post and by e-mail, case studies linked to the injection of
well fractures on well injectivity and reservoir sweep in water flooding and enhanced
oil recovery.
Information
collected from interviews, from those closely linked to the injection of well fractures
on well injectivity and reservoir sweep in water flooding and enhanced oil recovery
will be sourced, discussing the impact of injection of well fractures
injections. Questionnaires will be carefully distributed with a selective
rather than cumulative approach. The questionnaires shall be given to those who
have an insight into Impact of Injection Well Fractures (Creswell, 1994).
References
Creswell, JW 1994, Research design: qualitative and
quantitative approaches, Sage, Thousand Oaks, California.
Neretnieks,
I 2007, Single Well Injection Withdrawal Tests (SWIW) in Fractured Rock - Some
Aspects on Interpretation, Report R-07-54, Department of Chemical Engineering
and Technology, Royal Institute of Technology, Stockholm, Sweden.
Kohl,
T Evans, KF Hopkirk, RJ & Rybach, L 1995, Coupled Hydraulic, Thermal, and
Mechanical Considerations for the Simulation of Hot Dry Rock Reservoirs, Geothermics, Vol. 24, No. 3, p. 345 – 359..
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