Process for hydraulically fracturing a geological formation alon

Details Process for hydraulically fracturing a geological formation alon Process for hydraulically fracturing a geological formation alon

1981-05-22

1987-08-04

Leppink, James A.

Wells

Processes

Distinct, separate injection and producing wells

166308, E21B 4326

Patent

active

046839500

ABSTRACT:
This process comprises positioning along a predetermined direction two walls penetrating a geological formation to be fractured. During a preliminary period a predetermined amount of hydraulic fluid in injected.
During a preliminary period/hydraulic fluid is injected simultaneously into both wells during for a sufficient time interval at a pressure insufficient to fracture the formation, either at a substantially constant flow rate, or in a stepwise manner at progressively increasing pressure levels. This preliminary injection is followed by the injection of hydraulic fluid into at least one of the wells at a pressure higher than the pressure of fractuation of the formation.

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patent: 3850477 (1970-11-01), Aldrich et al.
patent: 3967853 (1976-07-01), Closmann et al.
patent: 3990514 (1976-11-01), Kreinin et al.

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