Exhibit 99.1

 

WARBURG PINCUS PRIVATE EQUITY X O&G, L.P.

 

 

 

 

 

By:

Warburg Pincus X, L.P., its general partner

 

 

By:

Warburg Pincus X GP L.P., its general partner

 

 

By:

WPP GP LLC, its general partner

 

 

By:

Warburg Pincus Partners, L.P., its managing member

 

 

By:

Warburg Pincus Partners GP LLC, its general partner

 

 

By:

Warburg Pincus & Co., its managing member

 

 

 

 

 

 

By:

/s/ Robert B. Knauss

 

 

 

Name:

Robert B. Knauss

 

 

 

Title:

Partner

 

 

 

 

 

 

WARBURG PINCUS X PARTNERS, L.P.

 

 

 

 

 

By:

Warburg Pincus X, L.P., its general partner

 

 

By:

Warburg Pincus X GP L.P., its general partner

 

 

By:

WPP GP LLC, its general partner

 

 

By:

Warburg Pincus Partners, L.P., its managing member

 

 

By:

Warburg Pincus Partners GP LLC, its general partner

 

 

By:

Warburg Pincus & Co., its managing member

 

 

 

 

 

 

 

By:

/s/ Robert B. Knauss

 

 

 

Name:

Robert B. Knauss

 

 

 

Title:

Partner

 

 

 

 

 

 

 

WARBURG PINCUS X, L.P.

 

 

 

 

 

 

By:

Warburg Pincus X GP L.P., its general partner

 

 

By:

WPP GP LLC, its general partner

 

 

By:

Warburg Pincus Partners, L.P., its managing member

 

 

By:

Warburg Pincus Partners GP LLC, its general partner

 

 

By:

Warburg Pincus & Co., its managing member

 

 

 

 

 

 

 

By:

/s/ Robert B. Knauss

 

 

 

Name:

Robert B. Knauss

 

 

 

Title:

Partner

 

 

 

 

 

 

WARBURG PINCUS X GP L.P.

 

 

 

 

 

 

By:

WPP GP LLC, its general partner

 

 

By:

Warburg Pincus Partners, L.P., its managing member

 

 

By:

Warburg Pincus Partners GP LLC, its general partner

 

 

By:

Warburg Pincus & Co., its managing member

 

 

 

 

 

 

 

By:

/s/ Robert B. Knauss

 

 

 

Name:

Robert B. Knauss

 

 

 

Title:

Partner

 

 

 

 

 

 

WPP GP LLC

 

 

 

 

 

 

By:

Warburg Pincus Partners, L.P., its managing member

 

 

By:

Warburg Pincus Partners GP LLC, its general partner

 

 

By:

Warburg Pincus & Co., its managing member

 

 

 

 

 

 

 

By:

/s/ Robert B. Knauss

 

 

 

Name:

Robert B. Knauss

 

 

 

Title:

Partner

 

 

 

 

 

 

WARBURG PINCUS PARTNERS, L.P.

 

 

 

 

 

 

By:

Warburg Pincus Partners GP LLC, its general partner

 

 

By:

Warburg Pincus & Co., its managing member

 

 

 

 

 

 

By:

/s/ Robert B. Knauss

 

 

 

Name:

Robert B. Knauss

 

 

 

Title:

Partner

 

 

 

 

 

 

WARBURG PINCUS PARTNERS GP LLC

 

 

 

 

 

 

By:

Warburg Pincus & Co., its managing member

 

 

 

 

 

 

 

By:

/s/ Robert B. Knauss

 

 

 

Name:

Robert B. Knauss

 

 

 

Title:

Partner

 

 

 

 

 

 

WARBURG PINCUS & CO.

 

 

 

 

 

 

 

By:

/s/ Robert B. Knauss

 

 

 

Name:

Robert B. Knauss

 

 

 

Title:

Partner

 

 

 

 

 

 

 

 

Date September 6, 2019