文档介绍：TECHNICAL REPORT
ENHANCED OIL RECOVERY (EOR)
FIELD DATA
LITERATURE SEARCH
Prepared for:
Danish North Sea Partner
Danish Energy Agency
Mærsk Olie og Gas AS
Prepared by:
Dr. Larry W. Lake
Dr. Mark P. Walsh
Department of Petroleum and Geosystems Engineering
University of Texas at Austin
Austin, TX
2008
EXECUTIVE SUMMARY
There has been considerable enhanced oil recovery (EOR) activity in the North Sea.
Eighteen of the 19 reported EOR projects have been gas processes. Most importantly, 16
of the 18 projects are economic esses. The outlook for EOR in the North Sea is
promising.
In a contract signed August 27, 2007, we were authorized to conduct an EOR literature
search and carry out model development work. This contract was preceded by an
proposal dated August 24, 2007, and entitled “Proposal: Enhanced Oil Recovery (EOR)
Field Data Literature Search.”
Not all reservoirs are amenable to EOR. Effective screening practices must be employed
to identify suitable candidates. Economic evaluations require an estimate of the recovery
performance. Empirical methods are invariably used to predict performance for early
evaluations. The objective of our literature search was to collect enough field data to
develop an empirical model to predict the oil-rate history of a prospect reservoir. Owing
to past and current EOR trends in the North Sea, efforts focused on miscible gas EOR.
We have essfully developed an EOR rate model. This model is based on hyperbolic
decline curves and material balance. The model effectively matches the production
history of tertiary miscible floods. The model can easily be incorporated into pre-existing
discounted cash-flow models.
The public literature is rich in EOR field data references. Over 390 papers were collected
on 70 separate miscible gas projects. Our search s