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NEW YORK ( TheStreet) - Petrohawk Energy (HK), Bill Barett (BBG), Comstock Resources(CRK) and Forest Oil (FST) clocked smart gains during the past week, while Core Laboratories(CLB), Energy Transfer Equity(ETE - Get Report), Lufkin Industries(LUFK) and TransAtlantic Petroleum(TAT - Get Report) fared badly.
Among the advancers for the week, Petrohawk Energy topped the charts, gaining 63%. Bill Barett jumped 17%. Bill Barett stock was raised to outperform at Wells Fargo.
Comstock Resources rose 15.7%, Forest Oil Corporation edged up 15.2% and
Pioneer Natural Resources(PXD - Get Report) moved up 14.3%.
Range Resources (RRC - Get Report) advanced 14.4% after the management announced an 8% increase in second-quarter production volume from the prior year quarter and a 10% boost in 2011 production. Meanwhile, the company's price realization for the quarter increased 11%.
Other movers were
Pioneer Natural Resources(PXD - Get Report), up 14.3%, while
Cabot Oil & Gas(COG - Get Report) rose 14% and
Berry Petroleum Company(BRY) improved 13.3%.
EQT Corporation(EQT - Get Report) edged up 12.7% after the stock was raised to outperform from neutral at Robert Baird with a price target of $66 per share.
Chesapeake Energy (CHK - Get Report) moved up 12.5% and
Bloomberg reports that the company is likely to announce a new natural gas discovery in the Utica Shale formation shortly.
Oasis Petroleum(OAS - Get Report) advanced 12.4% and
Whiting Petroleum(WLL - Get Report) increased 12.3%.
Denbury Resources(DNR - Get Report),
Nabors Industries(NBR - Get Report) and
Gran Tierra Energy(GTE - Get Report) gained more than 10% during the week.
Southwestern Energy(SWN - Get Report) soared 11% after the stock's target price was raised to $57 per share from $48 at Howard Weil.
Core Laboratories was the top laggard, down 5.8%, while Energy Transfer Equity lost 4.5%, Lufkin Industries erased 3.8% and TransAtlantic Petroleum reduced 3.2%.
CNOOC(CEO) trimmed 3.2% as the company intends to purchase Opti Canada, an oil-sands producer. Jefferies Group believes that it is a high-risk buy for CNOOC. The brokerage values Opti's production at about $275,000 per barrels per day and estimates proved and probable reserves at $3.54 a barrel.
Energy Transfer Partners(ETP - Get Report) fell 2.9% after S&P cut the company's outlook to negative from stable.
Other losers included
Spectra Energy Partners(SEP - Get Report),
Teekay Offshore Partners(TOO - Get Report),
Targa Resources Partners(NGLS) and
Williams Partners(WPZ - Get Report).