**Exhibit 12.1**

 
| ** **                                                                                                       | ** ** | **Six Months Ended** | ** ** | **Years Ended December 31,** | ** ** |
|------------------------------------------------------------------------------------------------------------------|------------|--------------------------------|------------|---------------------------------------------|------------|
| ** **                                                                                                       | ** ** | **June 30, 2012**    | ** ** | **2011**                                    | ** ** | **2010** | ** ** | **2009** | ** ** | **2008** | ** ** | **2007** | ** ** |
| ** **                                                                                                       | ** ** | **(in thousands)**        | ** ** | **(in thousands)**                     | ** ** |
| Fixed Charges:                                                                                                   |       |                           |       |                                        |       |   |   |   |   |   |   |   |   |
| Interest Charges                                                                                                 |       | $                              | (25,316    | )                                           | $          | 12,004 |   | $ | 3,593 |   | $ | 2,691 |   | $ | 2,361 |   | $ | 722 |   |
| Series A Convertible Preferred Stock,   cumulative, dividend rate 10%                                       |       | $                              | —     |                                        | $          | — |   | $ | — |   | $ | — |   | $ | 735 |   | $ | 511 |   |
| Series A Convertible Preferred Units of   Eureka Hunter Holdings, LLC, cumulative distribution rate of 8.0% |       | $                              | 2,369      |                                        | $          | — |   | $ | — |   | $ | — |   | $ | — |   | $ | — |   |
| Series B Convertible Preferred Stock,   cumulative, dividend rate 2.75%                                     |       | $                              | —     |                                        | $          | — |   | $ | 131 |   | $ | — |   | $ | — |   | $ | — |   |
| Series C Cumulative Perpetual Preferred   Stock, cumulative dividend rate 10.25%                            |       | $                              | 5,124      |                                        | $          | 3,759 |   | $ | 2,336 |   | $ | 26 |   | $ | — |   | $ | — |   |
| Series D Cumulative Preferred Stock,   cumulative dividend rate 8.0%                                        |       | $                              | 4,259      |                                        | $          | 10,248 |   | $ | — |   | $ | — |   | $ | — |   | $ | — |   |
| Total Fixed Charges                                                                                              |       | $                              | (13,564    | )                                           | $          | 26,011 |   | $ | 6,060 |   | $ | 2,717 |   | $ | 3,096 |   | $ | 1,233 |   |
|                                                                                                             |       |                           |       |                                        |       |   |   |   |   |   |   |   |   |
| Loss Before Taxes and Non-controlling Interest                                                                   |       | $                              | (32,232    | )                                           | $          | (77,108 | ) | $ | (22,128 | ) | $ | (15,633 | ) | $ | (11,109 | ) | $ | (5,916 | ) |
| Fixed Charges (Calculated Above)                                                                                 |       | $                              | (13,564    | )                                           | $          | 26,011 |   | $ | 6,060 |   | $ | 2,717 |   | $ | 3,096 |   | $ | 1,233 |   |
| Earnings                                                                                                         |       | $                              | (45,796    | )                                           | $          | (51,097 | ) | $ | (16,068 | ) | $ | (12,916 | ) | $ | (8,013 | ) | $ | (4,683 | ) |
|                                                                                                             |       |                           |       |                                        |       |   |   |   |   |   |   |   |   |
| **Ratio of Earnings to Fixed   Charges with Preferred Dividend (1)**                                             | ** ** | **—**                     | **(7)**    | **—**                                  | **(6)**    | **—** | **(5)** | **—** | **(4)** | **—** | **(3)** | **—** | **(2)** |

 

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| (1)    | For   purposes of determining the ratio of earnings to fixed charges, earnings are   defined as income from continuing operations before income taxes and   non-controlling interest, plus fixed charges and amortization of capitalized   interest, less capitalized interest. Fixed charges consist of interest   incurred (whether expensed or capitalized), amortization of deferred   financing costs and an estimate of the interest within rental expense. All   reported periods of the calculation of the ratio of earnings to fixed charges   exclude discontinued operations. |
|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| (2)    | Earnings   were inadequate to cover fixed charges for the year ended December 31,   2007 by $5.9 million                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| (3)    | Earnings   were inadequate to cover fixed charges for the year ended December 31,   2008 by $11.1 million                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| (4)    | Earnings   were inadequate to cover fixed charges for the year ended December 31,   2009 by $15.6 million                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| (5)    | Earnings   were inadequate to cover fixed charges for the year ended December 31,   2010 by $22.1 million                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| (6)    | Earnings   were inadequate to cover fixed charges for the year ended December 31,   2011 by $77.1 million                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| (7)    | Earnings   were inadequate to cover fixed charges for the three months ended   March 31, 2012 by $32.2 million                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |

 

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