• Privately held, Dallas-based Exco Resources Inc., dba TXOK Acquisition Inc., has completed the acquisition of oil and gas production companies from Oneok Inc., Tulsa, Okla., (NYSE: OKE) for $645 million. The purchase includes oil and gas in four fields in Oklahoma and Texas with estimated reserves of approximately 240 billion cu. ft. of gas equivalent. "With this transaction we will exit the oil and gas production business and will focus our attention on our other businesses," says David Kyle, Oneok chairman, president and chief executive officer. Oneok will use the proceeds from the sale to reduce debt. • Royalty trust Enerplus Resources Fund, Calgary, (Toronto, NYSE: ERF) has closed the acquisition of privately held, U.S.-based Sleeping Giant LLC for US$91.6 million including estimated debt and working capital. The transaction was funded through existing credit facilities. The acquired assets include additional working interests in the Sleeping Giant light crude oil project in Montana, which increases the company's ownership in this project to approximately 70% working interest. Enerplus gained interests in Sleeping Giant with its recent purchase of Lyco Energy Corp., Dallas. The properties have current production of approximately 1,700 BOE per day (90% oil). The acquisition also includes some gross 7.1 million BOE of proved-plus-probable reserves. Cosco Capital Management LLC was advisor to Sleeping Giant's owners, which included Cosco affiliate Cosco Investments LP. • Denver-based EnCana Oil & Gas (USA) Inc., a subsidiary of Calgary-based EnCana Corp. (Toronto: ECA) plans to acquire select interests in a Maverick Basin block in Southwest Texas for US$80 million from The Exploration Co., San Antonio, (Nasdaq: TXCO). The sale comes as a result of the conclusion of TXCO's strategic alternatives review. The acquisition includes interests in approximately 300,000 gross acres across the southern portion of TXCO's acreage. TXCO will retain an interest in two intervals. The purchase also includes an undivided 50% interest in approximately 220,000 gross acres across the northern portion of TXCO's Maverick Basin acreage, approximately 3% of TXCO's estimated proved reserves at June 30 and approximately 20% of TXCO's existing production at Sept. 1. TXCO will continue to hold interests in approximately 670,000 gross acres (470,000 net) in the Maverick Basin after closing, which was expected by the end of September. • Germany-based E.on (NYSE: EON) plans to acquire Caledonia Oil and Gas Ltd., a U.K.-based producer, from Greenwich, Conn.-based First Reserve Corp., for approximately EUR690 million (US$831.9 million). Caledonia has interests in 15 gas fields in the U.K. Southern North Sea with gas reserves of approximately 494 billion cu. ft. of gas equivalent to be produced in the next 10 years. Caledonia also owns Caledonia Energy Trading Ltd. and has interests in two pipeline systems near the gas fields for transporting gas to the U.K. ABN-AMRO was advisor to First Reserve on the transaction.