The recent Green Canyon Block 903 sidetrack, located about 1.3 miles from the discovery well, was drilled to 30,440 feet and encountered an oil/water contact deeper than the previous well, increasing the extent of the field.

“The Heidelberg sidetrack was successfully drilled and defined the down-dip limits of the Heidelberg field,” said Chuck Meloy, ­Anadarko senior vice president of worldwide operations.

“This