Exhibit 99.1

                            Joint Filers' Signatures


WARBURG PINCUS PRIVATE EQUITY (E&P) XI-
A (BRIGHAM), LLC

By:  Warburg Pincus Private Equity (E&P) XI-A,
     L.P., its sole member
By:  Warburg Pincus (E&P) XI, L.P., its general
     partner
By:  Warburg Pincus (E&P) XI LLC, its general
     partner
By:  Warburg Pincus Partners (E&P) XI LLC, its
     sole member
By:  Warburg Pincus Partners II (US), L.P., its
     managing member
By:  Warburg Pincus & Company US, LLC, its
     general partner

     /s/ Robert B. Knauss                Date:      04/25/2019
--------------------------------------        ---------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS PRIVATE EQUITY (E&P) XI-
A, L.P.

By:  Warburg Pincus (E&P) XI, L.P., its general
     partner
By:  Warburg Pincus (E&P) XI LLC, its general
     partner
By:  Warburg Pincus Partners (E&P) XI LLC, its
     sole member
By:  Warburg Pincus Partners II (US), L.P., its
     managing member
By:  Warburg Pincus & Company US, LLC, its
     general partner

     /s/ Robert B. Knauss                Date:      04/25/2019
--------------------------------------        ---------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS XI (E&P) PARTNERS-A
(BRIGHAM), LLC

By:  Warburg Pincus XI (E&P) Partners - A, L.P., its
     sole member
By:  Warburg Pincus (E&P) XI, L.P., its general
     partner
By:  Warburg Pincus (E&P) XI LLC, its general
     partner
By:  Warburg Pincus Partners (E&P) XI LLC, its
     sole member
By:  Warburg Pincus Partners II (US), L.P., its
     managing member
By:  Warburg Pincus & Company US, LLC, its
     general partner

     /s/ Robert B. Knauss                Date:      04/25/2019
--------------------------------------        ---------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS XI (E&P) PARTNERS - A, L.P.

By:  Warburg Pincus (E&P) XI, L.P., its general
     partner
By:  Warburg Pincus (E&P) XI LLC, its general
     partner
By:  Warburg Pincus Partners (E&P) XI LLC, its
     sole member
By:  Warburg Pincus Partners II (US), L.P., its
     managing member
By:  Warburg Pincus & Company US, LLC, its
     general partner

     /s/ Robert B. Knauss                Date:      04/25/2019
--------------------------------------        ---------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WP BRIGHAM HOLDINGS, L.P.

By:  Warburg Pincus (E&P) XI, L.P., its general
     partner
By:  Warburg Pincus (E&P) XI LLC, its general
     partner
By:  Warburg Pincus Partners (E&P) XI LLC, its
     sole member
By:  Warburg Pincus Partners II (US), L.P., its
     managing member
By:  Warburg Pincus & Company US, LLC, its
     general partner

     /s/ Robert B. Knauss                Date:      04/25/2019
--------------------------------------        ---------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS (E&P) XI, L.P.

By:  Warburg Pincus (E&P) XI LLC, its general
     partner
By:  Warburg Pincus Partners (E&P) XI LLC, its
     sole member
By:  Warburg Pincus Partners II (US), L.P., its
     managing member
By:  Warburg Pincus & Company US, LLC, its
     general partner

     /s/ Robert B. Knauss                Date:      04/25/2019
--------------------------------------        ---------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS PARTNERS (E&P) XI LLC

By:  Warburg Pincus Partners II (US), L.P., its
     managing member
By:  Warburg Pincus & Company US, LLC, its
     general partner

     /s/ Robert B. Knauss                Date:      04/25/2019
--------------------------------------        ---------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS (E&P) ENERGY LLC

By:  Warburg Pincus Partners II (US), L.P., its managing
     member
By:  Warburg Pincus & Company US, LLC, its general
     partner

     /s/ Robert B. Knauss                Date:      04/25/2019
--------------------------------------        ---------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS (E&P) ENERGY GP, L.P.

By:  Warburg Pincus (E&P) Energy LLC, its general
     partner
By:  Warburg Pincus Partners II (US), L.P., its managing
     member
By:  Warburg Pincus & Company US, LLC, its general
     partner

     /s/ Robert B. Knauss                Date:      04/25/2019
--------------------------------------        ---------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WP ENERGY BRIGHAM HOLDINGS, L.P.

By:  Warburg Pincus (E&P) Energy GP, L.P., its general
     partner
By:  Warburg Pincus (E&P) Energy LLC, its general
     partner
By:  Warburg Pincus Partners II (US), L.P., its managing
     member
By:  Warburg Pincus & Company US, LLC, its general
     partner

By:  /s/ Robert B. Knauss                 Date:     04/25/2019
     ---------------------------------         --------------------------------
     Name: Robert B. Knauss
     Title: Authorized Signatory


WP ENERGY PARTNERS BRIGHAM HOLDINGS, L.P.

By:  Warburg Pincus (E&P) Energy GP, L.P., its general
     partner
By:  Warburg Pincus (E&P) Energy LLC, its general
     partner
By:  Warburg Pincus Partners II (US), L.P., its managing
     member
By:  Warburg Pincus & Company US, LLC, its general
     partner

By:  /s/ Robert B. Knauss                 Date:     04/25/2019
--------------------------------------    -------------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS ENERGY (E&P)-A (BRIGHAM), LLC

By:  Warburg Pincus Energy (E&P)-A, L.P., its managing
     member
By:  Warburg Pincus (E&P) Energy GP, L.P., its general
     partner
By:  Warburg Pincus (E&P) Energy LLC, its general
     partner
By:  Warburg Pincus Partners II (US), L.P., its managing
     member
By:  Warburg Pincus & Company US, LLC, its general
     partner

By:  /s/ Robert B. Knauss                 Date:     04/25/2019
--------------------------------------         --------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS ENERGY (E&P)-A, L.P.

By:  Warburg Pincus (E&P) Energy GP, L.P., its general
     partner
By:  Warburg Pincus (E&P) Energy LLC, its general
     partner
By:  Warburg Pincus Partners II (US), L.P., its managing
     member
By:  Warburg Pincus & Company US, LLC, its general
     partner

By:  /s/ Robert B. Knauss                 Date:     04/25/2019
--------------------------------------         --------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS ENERGY (E&P) PARTNERS-A
(BRIGHAM), LLC

By:  Warburg Pincus Energy (E&P) Partners-A, L.P., its
     managing member
By:  Warburg Pincus (E&P) Energy GP, L.P., its general
     partner
By:  Warburg Pincus (E&P) Energy LLC, its general
     partner
By:  Warburg Pincus Partners II (US), L.P., its managing
     member

By:  Warburg Pincus & Company US, LLC, its general
     partner

By:  /s/ Robert B. Knauss                 Date:     04/25/2019
--------------------------------------         --------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS ENERGY (E&P) PARTNERS-A, L.P.

By:  Warburg Pincus (E&P) Energy GP, L.P., its general
     partner
By:  Warburg Pincus (E&P) Energy LLC, its general
     partner
By:  Warburg Pincus Partners II (US), L.P., its managing
     member
By:  Warburg Pincus & Company US, LLC, its general
     partner

By:  /s/ Robert B. Knauss                 Date:     04/25/2019
--------------------------------------         --------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS (E&P) XI LLC

By:  Warburg Pincus Partners (E&P) XI LLC, its sole
     member
By:  Warburg Pincus Partners II (US), L.P., its managing
     member
By:  Warburg Pincus & Company US, LLC, its general
     partner

By:  /s/ Robert B. Knauss                 Date:     04/25/2019
--------------------------------------         --------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS & CO US, LLC

By:  /s/ Robert B. Knauss                 Date:     04/25/2019
     ---------------------------------         --------------------------------
     Name: Robert B. Knauss
     Title: Authorized Signatory


BRIGHAM PARENT HOLDINGS, L.P.

By:  Warburg Pincus (E&P) XI, L.P., its general
     partner
By:  Warburg Pincus (E&P) XI LLC, its general
     partner
By:  Warburg Pincus Partners (E&P) XI LLC, its
     sole member
By:  Warburg Pincus Partners II (US), L.P., its
     managing member
By:  Warburg Pincus & Company US, LLC, its
     general partner

     /s/ Robert B. Knauss                 Date:     04/25/2019
--------------------------------------         --------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS PARTNERS II (US), L.P.

By: Warburg Pincus & Company US, LLC,
    its general partner

     /s/ Robert B. Knauss                 Date:     04/25/2019
--------------------------------------         --------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


WARBURG PINCUS LLC

By:  /s/ Robert B. Knauss                 Date:     04/25/2019
     ---------------------------------         --------------------------------
Name: Robert B. Knauss
Title: Authorized Signatory


CHARLES R. KAYE

By:  /s/ Charles R. Kaye                  Date:     04/25/2019
     ---------------------------------         --------------------------------
Name: Charles R. Kaye
By: Robert B. Knauss, Attorney-in-Fact*


JOSEPH P. LANDY

By:  /s/ Joseph P. Landy                  Date:     04/25/2019
     ---------------------------------         --------------------------------
Name: Joseph P. Landy
By: Robert B. Knauss, Attorney-in-Fact*


-----------------------------
* The Power of Attorney given by each of Mr.
Kaye and Mr. Landy was previously filed with the U.S. Securities and Exchange
Commission on July 12, 2016 as an exhibit to a beneficial ownership report on
Schedule 13D filed by WP LLC with respect to WEX Inc. and is hereby incorporated
by reference.