SALT DISSOLUTION IN OIL AND GAS TEST HOLES IN CENTRAL KANSAS PART Ⅲ SALT DISSOLUTION IN OIL AND GAS TEST HOLES IN THE CHASE-SILICA OILFIELD BARTON AND RICE COUNTIES, CENTRAL KS

摘要

In the 135.3 square mile area of the Chase-Silica Oilfield, Barton and Rice Counties, Kansas, all of the 4,845 oil and gas test holes drilled completely through the Hutchinson Salt Member of the Permian Wellington Formation encountered of depths near 900 feet on the east to near 1000 feet on the west. The salt has a thickness of about 250 feet in the structurally highest creas above buried Precambrian quartzite hills;of 300 feet over most of the oil producing area;and a thickness of over 350 feet in synclinal areas. The salt section includes nonevaporites (shale, rare siltstones) in beds having a thickness of one foot or more (the resolving power of the wire line geophysical logs) in the amounts of 17 percent (east) to 31 percent (west).