KELLEY OIL <KLY> BUYING OIL PROPERTIES Kelley Oil and Gas Partners Ltd said it has agreed to purchase all of CF Industries Inc's oil and natural gas properties for about 5,500,000 dlrs, effective July 1. It said the Louisiana properties had proven reserves at year-end of 11 billion cubic feet of natural gas and 85,000 barrels of oil, condensate and natural gas liquids. Kelley said it currently owns working interests in some of the properties.