United States Congressional Serial Set Volume 5458 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...layers. These last are often interbedded with dry or poorly saturated oil sands (zone B, in part). The thickness of the strata intervening between the "Big Blue" and the top of zone C reaches 450 feet in the deeper wells farther east down the dip. Very little regularity exists in the oil zones, as is shown by the well logs. The productive beds (zones C and D) consist of alternating coarse sands, fine gravels, blue and brown shale and shells, with coarse gravel at the base of zone D. The productive measures are usuahV about 225 feet thick, measuring from the top of the first productive sand to the brown Eocene shale of the Tejon formation, and though they comprise both zones C and D, a separation of the two is not possible in many of the wells. The total thickness in the wells from the base of the "Big Blue" to the brown shale of the Tejon is a little over 600 feet. Various names have been applied to certain individual sands that have been traced for short distances throughout this area. Among these is the "Sauer Dough" sand, which is the uppermost sand in some of the wells along the western edge of sec. 22. It is usually about 10 feet thick. About 40 feet below the "Sauer Dough" is a 40-foot sand known as the "Pulaski." A careful comparison of the logs in the area shows that these two sands, and others also to which local names have been given, are not traceable for any great distance, although the names have been applied to various strata in wells over other parts of the Eastside field. PRODUCT. Nearly all of the wells in this area have been drilled since 1904, so that data concerning decrease in production are rather meager. The production of the wells varies from about 25 to something like 700 barrels, th...