This article is a synopsis of paper SPE 38623, "Field Applications of Cryogenic Nitrogen as a Hydraulic-Fracturing Fluid," by B.W. McDaniel, SPE, S.R. Grundmann, and W.D. Kendrick, Halliburton Energy Services Inc., and D.R. Wilson, SPE, and S.W. Jordan, SPE, Conoco Inc., originally presented at the 1997 SPE Annual Technical Conference and Exhibition, San Antonio, Texas, 5-8 October.