XTO Energy Expects Year-End 2005 Reserves to Exceed 7.5 Tcfe

In connection with its securities analysts meeting, XTO Energy Inc. said that the Company expects year-end 2005 proved reserves to exceed 7.5 trillion cubic feet of natural gas equivalent (Tcfe). These reserve volumes imply an all-in finding and development cost for the year, including acquisitions, of between $1.40 - $1.50 per thousand cubic feet of gas equivalent (Mcfe). Based on development expenditures of about $1.4 billion, the Company further expects its 2005 drill bit finding costs to range between $1.10 - $1.20 per Mcfe. Final proved reserves estimates, as prepared by Miller & Lents, Ltd., will be available by late February.

XTO Energy Inc. is a domestic energy producer engaged in the acquisition, development and discovery of quality, long-lived oil and natural gas properties in the United States. Its properties are concentrated in Texas, New Mexico, Arkansas, Oklahoma, Kansas, Wyoming, Colorado, Alaska, Utah and Louisiana.