Bulletin . La Brea Lease; Salt Lake Oil Field, Los Angeles County. I. Pitch Lake, Rancho La Brea, Los Angeles County. J SALT LAKE OR SHERMAN ISLAND. 21 ( strated Id all directions, the drilling data is in the main kept very secret,so that even at this late date but little can be learned as to some parts ofthe field. For these reasons, such well records as were obtainable inthe circumstances are given first, while the general descriptions usuallygiven at the beginning of each chapter will, in this, follow the may, however, conduce to a better understanding of these notes tostate in a


Bulletin . La Brea Lease; Salt Lake Oil Field, Los Angeles County. I. Pitch Lake, Rancho La Brea, Los Angeles County. J SALT LAKE OR SHERMAN ISLAND. 21 ( strated Id all directions, the drilling data is in the main kept very secret,so that even at this late date but little can be learned as to some parts ofthe field. For these reasons, such well records as were obtainable inthe circumstances are given first, while the general descriptions usuallygiven at the beginning of each chapter will, in this, follow the may, however, conduce to a better understanding of these notes tostate in advance that the strata penetrated by these wells consist, in themain, of soft shales, clays and loose sands; that the oils are producedfrom incoherent sands, and that the shallow wells at the east are gen-erally free from water, while the deeper wells at the western end aremuch troubled in this regard. As to structure, the sands approachclose to the surface at the northeast corner of the developed field, anddip a little south of west, the dip being rather even in t


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