The Deep River oil field is north and east of the Deep River gas field in west-central Arenac County, Michigan, about 44 miles north of Saginaw. The discovery well was completed at the close of 1943 and development had practically ceased by the end of 1946. The field is decidedly elongate, with a northwest-southeast trend. The producing zone is a streak of porous dolomite surrounded by impervious limestone. It lies at the top of the Rogers City formation of Devonian age. The depth to the reservoir averages about 2,800 feet. The Deep River oil field is on the north and northeast flanks of a broad dome. The gas field, producing from Berea sandstone of Mississippian age, occupies the highest parts of the dome. The Rogers City formation is "tight" limestone where tested near the top of the dome. It is suggested that excess of solution over precipitation by dolomitizing solutions rising through a fracture in the Rogers City limestone produced the porosity resulting in the accumulation of oil in the Deep River oil field. Initial productions ranged up to 7,000 barrels. The yield for 1946 was nearly 2½ million barrels, from 100 wells. At that time the recovery per acre was 4,605 barrels.
Figures & Tables
Structure of Typical American Oil Fields: A Symposium of the Relation of Oil Accumulation to Structure
Modern petroleum geology in the United States had its beginning in the first decade of the 20th Century when the U.S. Geological Survey began mapping the structure of the rocks in and near old fields in order to discover the various types of structural conditions under which oil and gas are trapped. Structural geology has evolved as a branch of the broader science far more rapidly than have methods of mapping the attitude of rocks at the surface. This volume, published in the late 1920s, was designed to afford authoritative and modern descriptions of the structure of typical oil fields in the United States. Each of the 39 fields contained here is described by an author who is intimately familiar with the available data. The relationship of structure at the surface and at depth for different terranes is clearly set forth wherever the strata are not parallel. The volume concludes with a summary paper on the role of geologic structure in the accumulation of petroleum. Fields include: Florence, Colorado; Stephens, Arkansas; Kevin-Sunburst, Montana; Bradford Pennsylvania; and Salt Creek, Wyoming.