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AAPG Bulletin

Abstract


Volume: 34 (1950)

Issue: 3. (March)

First Page: 619

Last Page: 619

Title: Geology of Lindsay Area, Garvin and McClain Counties, Oklahoma: ABSTRACT

Author(s): R. M. Swesnik

Article Type: Meeting abstract

Abstract:

The Lindsay area in southwest McClain and northwest Garvin counties may be generalized as a complex, highly faulted cross-fold on the Pauls Valley arch, producing from a variety of porous formations of Ordovician, Siluro-Devonian and Pennsylvanian age. Originally separated because of different water levels and producing zones into three distinct fields by the Corporation Commission of Oklahoma, it is treated here as one complex pool.

The structural history is illustrated by a series of structural contour maps of the more important producing zones. The stratigraphy of the several producing formations is discussed in some detail. Presented also in the generalized historical geology of the geologic province in which the pool is located.

Colored maps show the areal distribution of the reservoir fluids, controlled by intersecting fault traps. A study of the maps seemed to indicate that the first and second Bromides act as one reservoir while the third Bromide is separate. Detailed stratigraphic studies indicate the third Bromide is probably Tulip Creek which accounts for its behavior as a separate reservoir. The McLish and underlying Oil Creek also behave as separate reservoirs. It is commonly possible to encounter water in the second Bromide, third Bromide, and McLish sands and produce oil or distillate from the Oil Creek. Each reservoir within each separate fault trap must be tested to determine its possible productivity. Water levels in adjacent fault blocks are of no value in predicting possible productive zones in a new fault block. Every well which is drilled in a new fault sector is wildcat; however, the multiplicity of producing zones reduces the dry-hole risk.

The Lindsay pools have produced, as follows: East Lindsay from 68 wells since December, 1946, has produced 4,812,128 barrels; North Lindsay from 22 wells since August, 1945, has produced 2,272,428 barrels; and Northeast Lindsay from 28 wells since January, 1947, has produced 1,642,742 barrels, or a grand total of 8,727,298 barrels from 118 wells which are now producing an average of 10,644 barrels per day. The pay-out on these wells which cost $175,000 to $250,000 varies as the allowable. In general, a dual completion making its full allowable from each formation pays out in less than a year while a well producing from only one formation may be expected to pay out in less than 2 years. The current allowable for North Lindsay Bromide is 190 barrels per day per well, East Lindsay Bromid 270 barrels per day per well, while the Hunton allowable is 190 barrels per day per well in all the Lindsay pools.

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