Well treating process and fluid composition for high temperature wells

Claim 1

A PROCESS COMPRISING THE STEPS OF: (A) INTRODUCING A FLUID INTO A WELL PENETRATING A SUBTERRANEAN FORMATION AT LEAST IN PART SUBJECT TO ELEVATED TEMPERATURES SUFFICIENT TO DECOMPOSE THERMALLY MATERIALS OF ORGANIC ORIGIN, SAID FLUID COMPRISING WATER AND A FINELY DIVIDED, COMBUSTIBLE BULK MATERIAL, THE BULK MATERIAL BEING PRESENT IN AN AMOUNT NOT LESS THAN 5 POUNDS PER BARREL OF FLUID, (B) CIRCULATING THE FLUID IN THE WELL AT A RATE SUFFICIENT TO MAINTAIN THE BULK COMBUSTIBLE MATERIAL BELOW THERMAL DECOMPOSITION TEMPERATURES, AND THEREAFTER (C) DISCONTINUING CIRCULATING THE FLUID IN THE WELL WHEREBY THE TEMPERATURE OF THE FLUID REMAINING IN THE WELL ADJACENT THE ELEVATED TEMPERATURE PART OF SAID FORMATION IS INCREASED SUFFICIENTLY THAT THE COMBUSTIBLE BULK MATERIAL IS THERMALLY DECOMPOSED.