Yield-increasing potential evaluation method aiming at typical fracture failure wells

Abstract

The invention relates to a yield-increasing potential evaluation method aiming at typical fracture failure wells in a hydraulic fracturing process in the field of petroleum engineering. Single wells are classified according to the single well control reservoir stratum coefficient; evaluation indexes of the fracture failure wells are built; and typical failure wells are selected. The single well control reserves are calculated by a volume method and a geologic model method; and the recovery percent of reserves of the current single well is calculated by combining current production data of thetypical failure wells. Finally, by referring to the final recovery rate of oil and gas fields, the yield-increasing potential factor of oil gas wells is defined, and the yield-increasing potential ofthe typical failure wells is quantitatively analyzed. The yield-increasing potential evaluation method has the advantages that the earlier-period fracture failure wells are finely selected; the yield-increasing potential of the typical fracture failure wells is accurately evaluated; the theory is reliable; the practical operability is high; guidance and suggestion are provided for the later-periodrepeated fracturing process; and the repeated fracturing risk is greatly reduced.

Description

technical field [0001] The invention relates to a production stimulation potential evaluation method for typical fracturing failure wells, which is mainly applicable to the hydraulic fracturing process in the field of petroleum engineering. Background technique [0002] Hydraulic fracturing technology is an important measure for oil and gas reservoir stimulation. Hydraulic fracturing is to use the surface high-pressure pump group to pump fracturing fluid (pre-fluid) into the formation with a displacement exceeding the formation's liquid absorption capacity to generate fractures, and then continue to inject fracturing fluid with sand (proppant) ( Sand-carrying fluid) to make the fracture continue to extend and fill it with proppant. When the fracturing fluid flows back, the proppant left in the fracture prevents the fracture from completely closing and keeps the fracture at a certain level under the closing pressure. The degree of opening is to form a sand-filled fracture wi...

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Problems solved by technology

[0004] At present, there are many methods for evaluating the productivity of oil and gas wells at home and abroad, but there is still a lack of systematic research on how to analyze the stimulation effectiveness of oil and gas wells after fracturing and the re-fracturing stimulation potential of typical fracturing failure wells. Fine refracturing provides basic guarantee, so there are still great economic risks in refracturing

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