The Dong Sheng Pu Buried Hill reservoir in Liaoning Province is a fractured, metamorphic basement rock of generally low porosity which contains an undersaturated, 36° API oil. Production began in 1983. In late 1985 and early 1986, a detailed reservoir study was conducted to determine the most appropriate method of developing and operating the field. Water injection was predicted to yield the highest oil recovery and cash flow at an average oil price of $17/bbl. A water injection pilot was recommended. The operator has been developing the field according to recommendations put forth in the study.

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