0000950134-02-004307 Sample Contracts

EXHIBIT 99.1 PIONEER NATURAL RESOURCES COMPANY DEBT SECURITIES UNDERWRITING AGREEMENT
Underwriting Agreement • April 29th, 2002 • Pioneer Natural Resources Co • Crude petroleum & natural gas • New York
FORM OF GUARANTEE
Guarantee • April 29th, 2002 • Pioneer Natural Resources Co • Crude petroleum & natural gas • New York
FORM OF THIRD SUPPLEMENTAL INDENTURE
Third Supplemental Indenture • April 29th, 2002 • Pioneer Natural Resources Co • Crude petroleum & natural gas • New York