NEW YORK ( TheStreet) -- Halliburton ( HAL), Schlumberger ( SLB), Trina Solar ( TSL), Complete Production Services ( CPX), ReneSola ( SOL), Sinopec ( SNP), CNOOC ( CEO), Apache Corporation ( APA), Helix Energy ( HLX) and Royal Dutch Shell ( RDS/A) are energy stocks with analyst buy ratings of up to 91%. These stocks have the potential to deliver gains in the range of 14% to 60%, based on analysts' consensus estimates of 12-month price targets.

Crude oil prices rose to a two-year high on Monday, after Brent touched $103 per barrel. The Middle East's political unrest could exacerbate crude oil supply concerns. Earlier in the month, crude prices breached the $100 per barrel threshold, after riots rocked Egypt.

We have identified ten energy stocks that received analysts' top buy ratings and which have the potential to deliver attractive returns over the next one year. The following 10 stocks returned an average 40% in the last one year on superior fundamentals. Analysts' consensus estimate indicates a potential 14%-60% upside in the next one year.

Further, STR Holdings ( STRI), Petroleo Brasileiro ( PBR), JA Solar Holdings ( JASO), LDK Solar ( LDK) and GT Solar International ( SOLR) could deliver healthy upsides according to analysts, however, we did not consider them because of their lower buy ratings.

10. Royal Dutch Shell ( RDS.A) is a Netherlands-based oil & gas company operating in three business segments: upstream, downstream and corporate.

Revenue increased 25% year-over-year to $100 billion during the third quarter, while net income grew 240% to $6.9 billion. For full year 2010, net income grew 60%.

Reviewing the results, Peter Voser, Royal Dutch Shell CEO, said in a press statement, "Our 2010 earnings increased substantially from 2009 levels, driven by improving industry fundamentals, and Shell's production growth and cost performance. Our 2010 oil and natural gas production volumes was 3.3 million barrel per oil equivalent per day, an increase of 5%. LNG sales volumes increased by 25%, with continued growth in Downstream. Fourth quarter and full year 2010 earnings were supported by higher oil prices and chemicals margins."

In 2010, Royal Dutch started six projects upstream and downstream. Early 2011, production started at Qatargas 4 LNG facility and commissioning is underway at the Pearl GTL plant. With these projects coming on-stream, Shell is targeting an 11% increase in oil and natural gas production from 2009 to 2012. The stock is trading at 8.9 times its estimated 2011 earnings.

9. Helix Energy ( HLX) is a leading marine contractor and operator of offshore oil and gas properties and production facilities.

Net revenue increased 82% year-over-year during 2010 third quarter, while net income rose from $4 million to $28 million during the same period. Increase in net profit is mostly attributable to optimal fleet utilization and deployment of Helix Producer 1. Gross profit margin improved to 29% from 17% at the end of September last year.

The balance sheet looks strong with net debt balance of $1 billion and liquidity of around $700 million at the end of September. The company is likely to post capital expenditure of $200 million for 2010.

Of the seven analysts covering the stock, five recommend buy. The stock has 32% upside potential in the next one year, based on consensus estimates, and is trading ten times below its 2011 estimated earnings.

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

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. Besides, discoveries like Horn River shale gas development in Canada, the Faghur Basin in Egypt and the Julimar and Reindeer discoveries in Australia would be key growth drivers.

Apache's strong book and cash flows provide flexibility for further grow from core operations, and the management is pursuing larger exploration programs and probable acquisitions. Of the 30 analysts covering the stock, 22 recommend a buy. The stock returned 17% during the last one year and is currently trading at eight times its estimated 2011 earnings.

7. CNOOC ( CEO) is a China-based producer of offshore crude oil and natural gas. The company has four offshore production fields in China and operates upstream assets in countries like Nigeria and Australia.

For 2010 third quarter, the company reported net production of 89 million barrels of oil equivalent, representing 50% increase year-over-year. This increment can be attributed to a production ramp up at projects that have come on-stream since 2009 and contribution from newly acquired projects.

Revenue rose 60% year-over-year during 2010 third quarter, benefiting from increased oil and gas production. Average realized oil price increased 9.3% year-over-year to $74.15 per barrel for the September quarter, while realized gas price was $3.96 per thousand cubic feet during the same period.

Annual production is expected to surpass the targeted 319 to 329 million barrels oil equivalent. The stock gained 31% in the last one year with analysts' buy ratings of 75%, and is trading at 9.7 times its estimated 2011 earnings.

6. Sinopec ( SNP) is a China-based integrated oil & gas and chemicals company and owns eight of the top ten refineries in the country.

With the government's new refined oil pricing mechanism, effective since end 2008, Sinopec's refining business has turned around after years of loss making.

For the first nine months of 2010, the company produced 35 million barrels of crude oil and 8.9 billion cubic meters of natural gas, representing an increase of 1.9% and 45.0% during the same period last year, respectively. Revenue jumped 60% in the first nine months, while net income improved 11% during the same period

The stock appreciated 35% in the last one year and consensus estimates expect a 16% rise over the next one year. Upstream asset injections from parent company, Renminbi appreciation, and changes to refined product pricing mechanism are probable triggers. The stock is trading at around eight times its estimated 2010 earnings, at a 30% discount to its closest peers.

5. ReneSola ( SOL) is a China-based manufacturer of solar wafers and solar module products. As China's largest solar wafer supplier, SOL generates around three-fifths of its revenue from the local market.

During the September quarter, net income grew 67% year-over-year, boosted by foreign exchange gains. Net revenue was up 41% on record solar wafer shipments, up 26% from the second quarter. Efficient cost management improved operating margins to 24.1% from 20.6% in the June quarter.

SOL foresees robust demand for solar products in its full-year guidance and expects solar wafer and module shipments of 1.6-1.7GW for 2011. The stock gained 125% during the last one year, after receiving analysts' buy rating of 80%. The scrip is trading at 6.8 times its estimated 2011 earnings.

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

During the fourth quarter, revenue was up 13% to $473 million and earnings before interest, tax and depreciation increased 7% year-over-year to $121 million. Operating income stood at around $75 million, up 9% compared to 2010 third quarter. Net income increased to $38 million from $5 million in the previous quarter.

For full year 2010, net revenue was $1.6 billion, up 48% year-over-year. Operating income was $193 million in 2010, while net income was $84 million. For 2011, Joe Winkler, Chairman and CEO, said in a press statement, "We continue to enhance platform through capital investments, acquisitions and operational achievements, such as obtaining firm customer commitments for approximately 185,000 HHP of pressure pumping equipment that will be deployed throughout the course of 2011."

Based on consensus estimates, the stock is expected to deliver 39% in a year's time, and is currently trading at 11 times its estimated 2011 earnings.

3. Trina Solar ( TSL) is a China-based manufacturer of solar power products.

For the September quarter, net revenue surged over 100% year-on-year to $510 million. During this period, solar module shipments jumped 130% year-on-year.

Gross margins increased 300 basis points to 31.4%, following the cutback in silicon costs and non-silicon manufacturing expenses, compared to the same period last year. Net income doubled during this period to $83 million, pressured by lower interest costs.

Analysts favor Trina over peers on stable margins and higher cash flow generation from operations. The stock gained 14% during the last one year and is expected to rise 26%, based on analysts' consensus estimates and 84% buy rating.

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

During 2010 fourth quarter, net revenue increased $9.1 billion, compared to $5.7 billion in 2009 fourth quarter. The company's biggest revenue generator is oilfield services, which grew 16% year-over-year in the December quarter, contributing around two-thirds toward revenue.

A major revenue booster for the fourth quarter was the acquisition of Smith businesses, which contributed nearly $2.5 billion in revenue and pretax earnings of $275 million.

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.

The stock has analysts' buy ratings of 89% and is likely to deliver returns of 14% in the next one year. The scrip is trading at 4.3 times its estimated 2011 enterprise value per earnings before interest, tax, and depreciation.

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

During the fourth quarter, consolidated revenue increased to $5.2 billion from $3.7 billion in the fourth quarter of 2010. The management believes that strong U.S. and international operations churned robust top-line performance.

Dave Lesar, chairman, president and CEO said, "In North America, revenue and operating income increased 10% sequentially, outpacing the United States rig count growth of 4%. This 10% sequential growth is particularly noteworthy given the significant offsetting impact on revenue and operating income due to the fourth quarter decrease of activity in the Gulf of Mexico."

For 2010 fourth quarter, consolidated operating income stood at $980 million, compared to $820 million in the third quarter of 2010. Net income more than doubled to $605 million from $243 million in the same quarter last year.

For full year 2010, Halliburton reported revenue of $18 billion, up 22% from full year 2009.

>To see these stocks in action, visit the 10 Energy Stocks portfolio on Stockpickr.
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