American Oil and Gas Reporter - January 2017 - 82

is a function of cumulative production
plus expected future performance down
to an economic limit of three barrels of
oil a day. The map indicates five distinct
areas that display different production
characteristics:
* The northern area appears to have
marginal reserves potential (for instance,
the E2, E10 and E11 wells either have
poor or highly variable production).
* The area at the northwest periphery
contains the EW111 well, a mediocre
performer with a well-defined history
and exponential decline.
* The area at the southeast periphery
contains the EAU1 well, a single highrate, high-value well. Does this area have
new well drilling potential?
* The southern portion of the lease
was developed by the S3, A1, S4, E4 and
E8 wells. The S3 is a good well, but has
no discernible decline trend, and the S4
was a good well before it was lost to mechanical issues. The E8 has a well-defined
production decline, but shows indications
of early transient conditions. Of potential
interest are the E4 and A1 well areas.
The E4 always has been a poor producer
with variable rates and indications of
transient and bounded well conditions,
perhaps suggesting completion problems.
The A1 suffered a catastrophic casing or
sanding issue. Could it be a workover or
new drill candidate?
* The southern boundary is defined
by E5, E6 and E7 wells, with production
histories ranging from somewhat erratic
to fairly stable.
Figure 3 refines the general knowledge

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82 THE AMERICAN OIL & GAS REPORTER

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Figure 2 represents the locations of
17 wells drilled on the subject lease. Laterals generally were drilled in a northwest-to-southeast direction. However,
note the direction and production of the
EAU1 well compared with the offset
wells. The operator of this well appeared
to try something different than the operators of the surrounding wells.
Color coding of the well track identifies
particular operators. It is apparent some
operators appear to have done a better
job than others, particularly in regard to
stimulating the wells. Completion efficiency is a very important part of the
process.
Each well listing contains monthly
oil, water and gas production information.
These data were subjected to the four
plotting techniques for analysis. Interpretation derived the character of each
well from this analysis. It should be
pointed out that conclusions derived from
any one plot may reinforce or dismiss
ideas generated during comparative analysis of the other three plots.
The well-by-well analysis shows that
both transient and boundary-dominated
conditions are apparent in two of the 17
lease wells, with two additional wells
seemingly displaying this transition history.
Data variability or lack of slope definition
precluded similar conclusions in the remaining wells. In all, the analysis reveals
six wells that warrant additional interest.
Figure 2 includes the distribution of
reserves for the 17 wells. Ultimate recovery

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American Oil and Gas Reporter - January 2017

Table of Contents for the Digital Edition of American Oil and Gas Reporter - January 2017