METHOD OF OIL AND GAS PRODUCTION USING DETERMINATION OF FRACTURE DEVELOPMENT ZONES OF MULTI-STAGE HYDRAULIC FRACTURING Russian patent published in 2024 - IPC E21B47/06 E21B43/26 

FIELD: mining; measurement.

SUBSTANCE: method for determining zones of development of fractures of multistage hydraulic fracturing of formation (HFF) includes carrying out of multi-stage HFF at the first well, at which a pressure sensor is installed at the wellhead and the pressure data collection device is switched on for recording. After that, at least two hydraulic fracturing stages are performed, at the end of which the obtained signal is pre-processed and the wave propagation time in the well from the reflection point to the pressure sensor at the wellhead is determined from the obtained signal. After that wave propagation speed and distance between pressure oscillation wave reflection points in well and pressure sensor at wellhead are determined. Required number of cycles is repeated at the next stages of hydraulic fracturing, and as they are performed, the distance between the points of reflection of the pressure oscillation wave in the well and the pressure sensor at the wellhead is determined taking into account the results obtained at the previous stages. Further, multistage hydraulic fracturing design is recalculated for the remaining wells of the system taking into account values of intervals of development of fractures, obtained from results treatment of the first well. Similar actions are taken for the next wells of the system taking into account the results of the previous wells.

EFFECT: higher efficiency of hydraulic fracturing and expanded operating performances.

1 cl, 4 dwg