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Subsurface Cross Sections from Marion County Kansas, to Osage County, Oklahoma

1949; American Association of Petroleum Geologists; Volume: 33; Linguagem: Inglês

10.1306/3d933d16-16b1-11d7-8645000102c1865d

1558-9153

L. H. Lukert,

Geological formations and processes

The author discusses the results of a subsurface stratigraphic investigation based on cross-sectional studies in northeastern and north-central Oklahoma and south-central Kansas. Two continuous cross sections are presented. One extends from a well in Sec. 36, T. 19 S., R. 1 E., Marion County, Kansas, southward across the state line in R. 2 E., Kansas, and continues to a well in Sec. 8, T. 23 N., R. 3 W., Garfield County, Oklahoma. From that point the other section extends eastward to a well in Sec. 30, T. 22 N., R. 8 E., County, Oklahoma. The combined length of the cross sections is approximately 175 miles, and 33 wells are used. The area is on, or downdip from, the belt of outcrop of Lower Permian and Upper and Middle Pennsylvanian rocks, whose strike is slightly east of north and whose regional dip is toward the west. The area contains the transition between deposits of the northern Mid-Continent basin in which relatively thin but persistent limestones are a dominant feature and deposits of southern Oklahoma where clastic sediments strongly predominate. Rocks penetrated in wells used in the cross sections are Paleozoic in age and they are classified into Permian, Pennsylvanian, Mississippian, Silurian-Devonian, and Ordovician systems. The geologic section studied extends downward from the Herington limestone which is the uppermost member of the Permian Wolfcampian series. Although particular attention is giv n in this study to rocks in the Pennsylvanian Virgilian and Missourian series, the correlations of the older beds are also shown. Hundreds of wells have been drilled in the area which provide ample information for detail subsurface correlation studies. Since petroleum geologists have worked in this area for a long time, many subsurface correlations have been established. The correlations resulting from the present study are based on electrical logs and sample studies. Several published and unpublished surface sections and a field examination of outcrops were helpful in tracing some of the exposed beds underground. The cross sections show that beds and formations can be traced throughout the area. Subsurface rocks in the middle and lower Virgilian and Missourian series, however, are not so persistent and they End_Page 131------------------------------ present problems in correlation. Because of lithologic changes the same classification can not be used in County, Oklahoma, that is used in Kansas for this interval of rocks. Similar conditions have been found and reported by field geologists for the equivalent surface rocks. In southern County, Oklahoma, some of the Missourian beds were traced from the surface into the underground by well samples. This study shows that the Hogshooter, Dewey, and Wildhorse limestones and the Cottage Grove sandstone can be traced readily underground in the area of the cross sections. The data indicate that the Cottage Grove sandstone is equivalent to the Mussellem sand (of Bass) which is also referred to by some geologists as Osage Layton, Layton of Ponca City, or Pe ples. It is further concluded that the Avant and limestones are stratigraphically lower than the zone commonly called Avant, Avant-Dewey, or Dewey in the subsurface.