TESTS VERIFY ADVANTAGES OF HORIZONTAL WELLS IN OFFSHORE CHINA OIL FIELD

Keijin Gu, Yiqun Ye Nan Hai East Oil Corp. Guangzhou, Peoples Republic of China For the Liuhua 11-1 oil field development, extended drill stem tests showed that horizontal wells were more suitable than either vertical or high-angle deviated wells. Advantages of horizontal wells included three to four times increased productivity over the vertical well, slower water coning from the aquifer, and greater ultimate recovery from a single well.

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