Information Circular 107


(Figure 13) (Joel Duncan, Florida Geological
Survey, personal communication, 1991).
 As with Bluff Springs field, production from
McDavid field is solely from the discovery well.
Production from this one-well field, as of
December 1989, totaled about 121,000 barrels of
oil (Appendix 2).


 JAY FIELD

 Jay field was discovered in June, 1970, by the
drilling of the Humble St. Regis number 1 (permit
417) in Section 43, Township 5 North, Range 29
West, Santa Rosa County (Figures 3 and 14 and
Appendix 1). The well produced from the
Smackover Formation from -15,264 to -15,318
feet MSL. The initial production test yielded
1712 barrels of 50.70 A.P.I. gravity oil and 23
barrels of saltwater per day.
 Jay field is located within the "Jay trend" of
 Escambia and Santa Rosa Counties, Florida and
 Escambia County, Alabama (discussed in north
 Florida oil fields introduction above). The
 northern extension of Jay, in Escambia County,
 Alabama, is the Little Escambia Creek (LEC)
 field. Oil accumulation at Jay is within an
 asymmetric anticline with the fault complex
 forming the eastern barrier to oil migration
 (Figure 14) (Applegate and Lloyd, 1985).
 The northern limit of Jay field is a porosity
 barrier in Alabama where the lithology changes
 from porous dolostone to dense, micritic
 limestone. The porosity at Jay field is due to
 dolomitization of the pelletal grainstones in the
 upper, regressive section of the Smackover
 Formation. Dolomitization, fresh water leaching,
 and an anhydrite cap rock (Buckner Member of
 the Haynesville Formation, Figure 4) have
 formed a complex, extensive reservoir.
 Numerous analyses of the Jay area Smackover
 Formation, including comparisons with modern
 carbonate environments, have been made in
 attempts to understand this complex reservoir
 (Ottman et al., 1973 and 1976; Sigsby, 1976;
 Mancini and Benson, 1980; Lomando et al.,


1981; Vinet, 1984; Moore, 1984; Bradford, 1984;
Lloyd et al., 1986).
 Despite the complexity of the Jay field
Smackover Formation reservoir, exploration and
development of the field have been extremely
successful. Core analyses were combined with
bottom hole pressure data, porosity log
information, and other geologic data to arrive at a
highly successful reservoir management program
(Shirer et al., 1978; Langston et al., 1981;
Langston and Shirer, 1985).
 As of December 1989, Jay field was producing
from a total of 44 wells, 43 wells were temporarily
shut-in, and there were 27 injection wells. One
of these injection wells was completed in 1989
(Appendix 4). Total production for Jay field, as of
the end of 1989, was 365,479,000 barrels of oil
(Appendix 2).


 COLDWATER CREEK FIELD

 Coldwater Creek field was discovered on June
 4, 1988. The discovery well was a reentry of a
 Smackover wildcat. The original permit was
 issued to Inexco Oil Company (permit 1173).
 The location is about two miles east of the
 southern portion of Jay field in Section 26,
 Township 5 North, Range 29 West, Santa Rosa
 County (Figure 3). Inexco began drilling in
 November, 1985. They drilled the well to a total
 depth of -15,407 feet MSL, logged the well, and
 recommended plugging and abandonment.
 The top of the Smackover Formation had
 been encountered at -14,969 feet MSL; the
 Norphlet Sandstone at -15,331 feet MSL. Side
 wall core analyses by Location Sample Service,
 Inc. (Jackson, Mississippi) indicated a potential
 oil productive zone from -14,985 to -15,016 feet
 MSL. Mean porosity of the zone was about 14.8
 percent. Analysis of the same interval by
 Charles Tootle yielded a mean porosity of about
 12 percent, an original oil in place estimate of
 2,080,107 barrels, and a recoverable oil estimate
 of 312,016 barrels (Appendix 9).
 Louisiana Land and Exploration Company