Chinese Academy of Geological Sciences

Awei Li

Dongsheng Sun

Qunce Chen

Bangchen Wu

Yuehui Yang

A method and a device for determining fracture closure pressure based on hydraulic fracturing are provided. The method includes: determining a leak-off volume of a fluid during a refrac cycle according to a fluid pressure during the refrac cycle; generating a stiffness change curve during the refrac cycle according to the leak-off volume of the fluid and the fluid pressure; and determining the fracture closure pressure according to the stiffness change curve. A hydraulic coupling mechanism and change characteristics during a pressure attenuation process are quantitatively characterized, and characteristic response corresponding to a pressure drop curve before and after the fracture closure are accurately described, thereby providing a method and a device for determining fracture closure pressure with clear physical significance and objective effectiveness.

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Beijing, China

Awei Li