NERCI <NER> UNIT CLOSES OIL/GAS ACQUISITION Nerco Inc said its oil and gas unit closed the acquisition of a 47 pct working interest in the Broussard oil and gas field from <Davis Oil Co> for about 22.5 mln dlrs in cash. Nerco said it estimates the field's total proved developed and undeveloped reserves at 24 billion cubic feet, or equivalent, of natural gas, which more than doubles the company's previous reserves. The field is located in southern Louisiana.