NEW YORK ( TheStreet) -- Energy XXI (Bermuda) ( EXXI), El Paso Pipeline Partners ( EPB), Schlumberger ( SLB), Halliburton ( HAL), Enterprise Products Partners ( EPD), BreitBurn Energy Partners ( BBEP), National Oilwell Varco ( NOV), InterOil ( IOC), TransAtlantic Petroleum ( TAT), Apache Corporation ( APA) and Complete Production Services ( CPX) are energy stocks with analysts' buy ratings of nearly 93% as polled by Bloomberg. The above stocks have 11%-46% upside potential, based on analysts' average 12-month price targets.

The unrest in the Middle East and North Africa is weighing on crude, pushing prices above the triple-digit threshold. The launch of military operations by coalition forces in Libya on March 21 pushed Brent crude above the $116-per-barrel mark. But, dismal existing-home sales data in the U.S. and Japan's radiation contamination fears could damp crude oil in the near term.

However, we believe that crude oil prices could trade firm on the escalating turmoil in Libya. At close Tuesday, WTI crude hit $102 per barrel, while Brent crude settled at $110 per barrel.

We have identified 11 energy stocks that received analysts' top buy ratings and hold the potential to deliver attractive returns over the next one year. These stocks returned an average 50% during the last one year. Analysts' consensus estimate indicates a potential 11%-46% upside over the next one year.

11. Complete Production Services ( CPX) supports oil and gas companies to develop their hydrocarbon reserves.

For fourth quarter of 2010, the company reported 13% sequential increase in revenue to $473 million. Increases in pressure pumping, coil tubing and fluid handling businesses, and seasonal improvements in Canada accounted for the revenue surge.

Net income rose to $38 million from $5 million in the previous quarter. Adjusted EBITDA was 28.6% for the fourth quarter, lower than the third quarter, due to start up related costs associated with new equipment deployments.

For full-year 2010, net revenue was $1.6 billion, up 48% year-over-year, while net income was $84 million.

Based on analysts' consensus estimates, the stock is expected to deliver 17% in a year's time and is currently trading at 12.2 times its estimated 2011 earnings. Analysts polled by Bloomberg have 82% buy ratings on the stock.

10. Apache Corporation ( APA) is an independent energy company engaged in the exploration, development and production of natural gas and crude oil.

In March 2011, the company's subsidiary, Apache Deepwater, agreed to join Marine Well Containment Company (MWCC), a partnership company committed to handle deepwater operations in the Gulf of Mexico. Other MWCC members are ExxonMobil ( XOM), Chevron ( XOM), ConocoPhillips ( XOM), Royal Dutch Shell ( RDS.A) and BP ( BP).

During the past decade, the company invested $40 billion, approximately 75%, on exploration and development activities and 25% on acquisitions. These investments stimulated an average 11% growth rate for both reserves and production. Going ahead, the management intends to pursue larger exploration programs and probable acquisitions.

Apache's strong book and cash flows improve the stock's growth prospects. Of the 29 analysts covering the stock, 24 recommend a buy. The stock returned 23% during the last one year and is currently trading at 11.2 times its estimated 2011 earnings.

9. TransAtlantic Petroleum ( TAT) is a vertically integrated international oil and gas company engaged in the acquisition, development, exploration, and production of crude oil and natural gas.

For the fourth quarter of 2010, net oil and gas production, after royalty, increased 171% year-over-year to 344,000 barrels of oil equivalent (boe) from 127,000 boe during the fourth quarter of 2009. For 2010, net oil and gas production, after royalty, surged to 974,000 boe, 133% from 2009, on improved production at the Selmo oil field.

Additional production at the Arpatepe oil field and new production in the Thrace Basin gas fields also contributed towards oil and gas production increase. The company acquired Thrace Basin in November 2010. In a press note, the management said, "We would complete our presence in the Thrace Basin with additional acreage and an operational base on the southern flank of the basin. This would expand our inventory of shallow gas targets and is a very attractive area for deeper conventional and unconventional gas. In addition, the oil field service equipment will serve us well as we continue to ramp up our activity in Turkey."

Analysts have 83% buy ratings on the stock and expect the stock to deliver 46% upside in the next one year.

8. InterOil ( IOC) is an integrated energy company operating in the Pacific region in the upstream, midstream and downstream business segments.

Earlier in February, InterOil and Liquid Niugini Gas--a joint venture liquefied natural gas project--announced to collaborate with Pacific LNG Operations for developing and operating a 3-million-tonne-per-annum land-based modular LNG plant in Papua Guinea. The proposed LNG plant is expected to process an estimated 2.25 trillion cubic feet of natural gas over the next 15 years.

The company's revenue for the third quarter was up 20% year-over-year to $208.5 million. Net loss for the same quarter was $14.4 million, opposed to a net loss of $25.3 million for the same quarter in 2009.

As per analysts polled by Bloomberg, the stock has 83% buy ratings and is expected to deliver an upside of 35% over the next one year.

7. National Oilwell Varco ( NOV) supplies equipment and components used in oil and gas drilling and production operations.

For fourth quarter of 2010, net income increased 12% to $440 million from $394 million in the same quarter last year. Revenue came in flat at $ 3.2 billion. Gross profit margin stood at 31.5%, compared to 31.3% in 2009 fourth quarter.

The company spent $600 million on acquisitions and ended 2010 with a cash balance of $3.3 billion. The management indicates that the oil & gas industry would continue to upgrade the world's rig fleet, providing business opportunities for the company. The company derives three-fifths of revenue from its rig technology segment. With analysts' buy ratings of 84%, the stock is expected to deliver 15% over the next one year. The stock is trading at 19 times its estimated 2011 earnings.

6. BreitBurn Energy Partners ( BBEP) acquires and develops oil and gas properties in the U.S. The company's assets primarily comprise of producing and non-producing crude oil and natural gas reserves in the states of Michigan, California, Florida, and Kentucky.

Production for full-year 2010 was at the high-end of the guidance range reaching 6.7 million barrels of oil equivalent (boe), an increase of 3% from 2009. Adjusted earnings before interest, tax, depreciation, amortization, topped the guidance range at $227 million.

The company managed operating costs well. Full-year lease operating expenses per boe stood at $17.7, below the lower-end guidance range of $18.3 to $20.8 per boe, and 1% below 2009 operating expenses per boe. General and administrative expenses came lower at $24.5 million, below the lower end of the guidance range of $25.0-$27.0 million. The stock is trading at 25.5 times its estimated 2011 earnings and has analysts' buy ratings of 86%.

5. Enterprise Products Partners ( EPD) provides a range of services to producers and consumers of natural gas, natural gas liquids, crude oil, refined products and petrochemicals in the U.S. Canada, and Gulf of Mexico.

Net income for 2010 was $1.4 billion and distributable cash flow was $2.3 billion, backed by record crude oil, petrochemical, refined and natural gas pipeline volumes. Overall, net income and distributable cash flow increased 21% and 37% year-over-year, respectively.

Michael A. Creel, president and CEO of Enterprise, commented in a press statement," "We invested $3.1 billion of capital to develop and acquire midstream energy infrastructure to serve our producing customers in areas such as the Haynesville/Bossier Shale and the Eagle Ford Shale and to accommodate our petrochemical customers' increasing demand for NGLs. Three major construction projects began operations during 2010: a 5.3 million barrel refined products storage facility serving a large refining customer in Port Arthur, Texas; the Trinity River Basin natural gas pipeline serving producers in the Barnett Shale area of North Texas; and a fourth NGL fractionators at our complex in Mont Belvieu, Texas." Analysts expect the stock to deliver an upside of 11% during the last one year with analyst buy ratings of 86%. The stock is trading at 23 times its 2011 estimated earnings.

4. Halliburton ( HAL) provides services related to exploration and production of oil and natural gas.

From March 2011, Halliburton plans to integrate drilling capabilities of its service lines to enhance drilling performance and reduce operators' well costs.

Strong North American and international operations churned robust top-line performance, boosting fourth quarter top-line. Consolidated revenue increased to $5.2 billion from $3.7 billion in 2010 fourth quarter. Revenue growth is particularly significant as drilling activity was suspended in the Gulf of Mexico during the fourth quarter. Net income more than doubled to $605 million from $243 million during the same quarter last year.

Of the 37 analysts covering the stock, 33 recommend a buy. Analysts are positive on the stock as it delivered 49% during the last one year. The stock is trading at 15.8 times its estimated 2011 earnings.

3. Schlumberger ( SLB) is a supplier of technology, integrated project management and information solutions to the oil and gas industry.

During 2010 fourth quarter, revenue from North American operations surged 84% year-over-year to $1.6 billion. Overall, net revenue increased $9.1 billion, compared to $5.7 billion in 2009 fourth quarter. The acquisition of Smith's businesses during the fourth quarter was a revenue booster, contributing nearly $2.5 billion in revenue and pre-tax earnings of $275 million.

Revenue from oilfield services grew 16% year-over-year in the December quarter, contributing around two-thirds toward revenue. However, Latin America and Europe remain a drag on the revenue.

The management indicates that increased oil and gas demand need for higher technology needs for exploration, deepwater operations are expected triggers for Schlumberger in 2011.

A combination of balance sheet strength, technological leadership and management expertise are key positives for the stock. The stock has analysts' buy ratings of 89% and is likely to deliver returns of 19% in the next one year. The scrip is trading at 12 times its estimated 2011 enterprise value per earnings before interest, tax, and depreciation.

2. El Paso Pipeline Partners ( EPB) owns and operates natural gas transportation pipelines and storage assets in the U.S.

The company recently announced to acquire an additional 22% interest in Southern Natural Gas for $587 million. The proposed stake buy would take the company's share in Southern Natural to 82%.

Net revenue for fourth-quarter and full-year 2010 jumped 14% and 20% to $352 million and $1.34 billion, respectively.

Operating income for the fourth-quarter and full-year 2010 climbed 17% and 28% to $202 million and $747 million, respectively, from the same periods in 2009.

Net income for the fourth-quarter and full-year 2010 rose 5% and 19%, respectively. The stock has analysts' buy ratings of 92% and is expected to return 14% in the next one year. The stock is trading at 16 times its estimated 2011 earnings.

1. Energy XXI (Bermuda) ( EXXI) is an independent oil and natural gas exploration and production company with business interests in the U.S. Gulf coast and Gulf of Mexico.

For 2011 fiscal second quarter, Energy XX1 reported earnings before interest, tax, and depreciation of $107.5 million, compared to $66.3 million in 2010 fiscal second quarter. Net loss was $11.3 million on revenue of $174 million and production of 29,400 barrels of oil equivalent per day during fiscal 2011 second quarter. The results include contribution from acquisitions made in certain Gulf of Mexico properties.

The stock rose 72% in the last one year and is trading at 4.3 times its estimated 2011 enterprise value per EBITDA. Of the 14 analysts covering the stock, 13 rate a buy. The stock is expected to deliver 15% return in the next one year, according to analysts' consensus estimates. The stock is trading at 15.3 times its estimated 2012 earnings.

>>To see these stocks in action, visit the 11 Energy Stocks With Top Buy Ratings portfolio on Stockpickr.