Treatment of fluid-producing formations

Claim 1

THE PROCESS OF FRACTURING A SUBTERRANEAN FORMATION PENETRATED BY A WELLBORE WHICH CONSISTS ESSENTIALLY OF ADMIXING, WITH A LIQUID FRACTURING COMPOSITION, BETWEEN 10 AND 250 POUNDS, PER THOUSAND GALLONS OF THE LIQUID PORTION OF SAID COMPOSITION, OF A LOW-SOLUBILITY POLYPHOSPHATE SELECTED FROM THE CLASS CONSISTING OF ALKALI METAL MAGNESIUM POLYPHOSPHATE, ALKALI METAL CALCIUM POLYPHOSPHATES, ALKALI METAL CALCIUM MAGNESIUM POLYPHOSPHATES, AND MIXTURES THEREOF TO PREPARE A SLURRY OF SAID POLYPHOSPHATE AND INJECTING THE SLURRY DOWN THE WELBORE AND BACK INTO THE FORMATION WITH SUFFICIENT FORCE TO EFFECT FRACTURES IN THE FORMATION AND TO EMBED AT LEAST A PORTION OF THE POLYPHOSPHATE CONTAINED IN THE SLURRY IN THE INTERSTICES, PORES, PASSAGEWAYS, AND FISSURES REMOTE FROM THE WELLBORE, INCLUDING FISSURES NEWLY MADE BY THE FRACTURING PRESSURES, AND TO CAUSE THE POLYPHOSPHATE SO EMBEDDED TO BE HELD IN SAID INTERSTICES, PORES, PASSAGEWAYS, AND FISSURES TO PROVIDE A FRONT COMPRISING SAID POLYPHOSPHATE WITHIN SAID FORMATION REMOTE FROM SAID WELLBORE AND SO LODGED THAT UNDERGROUND WATER MOVING IN THE DIRECTION OF SAID WELLBORE MUST PASS THROUGH SAID FRONT AND THEREBY CAUSE LOW-SOLUBILITY SALT PRODUCING IONS THEREIN TO COME IN CONTACT WITH THE POLYPHOSPHATE COMPRISING SAID FRONT AND THEREBY LESSEN THE TENDENCY TO FORM LOW-SOLUBILITY SALTS IN SAID FLUID-BEARING FORMATION.