WORLD'S FIRST TRILATERAL HORIZONTAL WELLS ON STREAM

Unocal Corp. continues to advance the frontier of horizontal drilling technology off California. The company has placed on production in the Santa Barbara Channel's aging Dos Cuadras oil field four trilateral horizontal wells it says are the world's first. All four were drilled and completed before a Union Pacific Resources Co. trilateral horizontal well was completed in Brazos County, Tex. (OGJ, Nov. 15, p. 32). Unocal has claimed other horizontal drilling records off California as