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Kansas Geological Survey, Open-file Report 2005-14

Lithofacies Cross Sections of the St. Louis Limestone, Big Bow and Sand Arroyo Creek Fields, Southwest Kansas

Lianshuang Qi and Timothy R. Carr,
Kansas Geological Survey

KGS Open File Report 2005-14
May 2005, Revised Sept. 2005

Big Bow Field was discovered in 1989 and has produced more than 6.6 million barrels oil. Sand Arroyo Creek Field was discovered in 1996 and has produced over 0.1 million barrels oil. Ten cored wells are available and six major lithofacies have been classified according to detailed core description. Approximately 100 wells (10 cored wells and 90 uncored wells) with available well logs were digitized and assembled into a database. Core lithofacies were projected into log lithofacies using a neural network approach (Qi and Carr, in press).

Complete lithofacies curves from core description or generated from optimal neural network prediction have been used to construct cross sections. With the interpretive color-fill function (PETRA software, geoPlus Corp.), 17 color-filled stratigraphic cross sections of St. Louis Limestone in Big Bow and Sand Arroyo Creek fields were constructed (Figure 1) and attached from Figures 2 to 18. While honoring the observed well data, the interpolated facies do not provide a geological reasonable interpretation. However, patterns of depositional facies are illustrated and can be used for futher geostatistical simulation.

Fig. 1--Well locations and cross sections of Big Bow and Sand Arroyo Creek fields, T29-T30S and R38-R41W, St. Louis Limestone, southwest Kansas. This figure is available as a larger PDF version (230 KB).

17 cross sections placed on map

By clicking the cross sections in the following table, color-fill interpolated cross sections can be displayed.

This report is part of a larger study of the St. Louis Limestone in southwest Kansas that includes core descriptions (Qi and Carr, 2005), geostatistical facies predictions (Qi and Carr, in press), and geostatistical facies modeling (Qi, Carr, and Goldstein, in prep.).

Cross Sections

Section A-A'
(Figure 2)
Section B-B'
(Figure 3)
Section C-C'
(Figure 4)
Section D-D'
(Figure 5)
Section E-E'
(Figure 6)
Section F-F'
(Figure 7)
Section G-G'
(Figure 8)
Section H-H'
(Figure 9)
Section I-I'
(Figure 10)
Section J-J'
(Figure 11)
Section K-K'
(Figure 12)
Section L-L'
(Figure 13)
Section M-M'
(Figure 14)
Section N-N'
(Figure 15)
Section O-O'
(Figure 16)
Section P-P'
(Figure 17)
Section Q-Q'
(Figure 18)


Qi, Lianshuang, and Carr, Timothy R., 2005, Core Description of the St. Louis Limestone in the Big Bow West, Sand Arroyo Creek, and Sand Arroyo Creek Southwest Fields, Southwest Kansas: Kansas Geological Survey, Open-file Rept. 2005-16. [available online]

Qi, Lianshuang, and Carr, Timothy R., in press, Prediction of carbonate lithofacies from digital well logs using neural network, Big Bow and Sand Arroyo Creek fields, southwest Kansas.

Qi, Lianshuang, Carr, Timothy R., and Goldstein, Robert H., in prep., Geostatistical 3D modeling of oolite shoal reservoirs, St. Louis Limestone, southwest Kansas.

Kansas Geological Survey, Energy Research
Updated May 5, 2005; Revised Sept. 20, 2005
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