Method for acquiring opening timing of natural fracture under in-slit temporary plugging condition
A method for acquiring an opening timing of natural fracture under an in-slit temporary plugging condition and a device thereof are provided. The method includes steps of: acquiring physical parameters of stratum according to site geological data, and measuring a slit length L of a hydraulic fracture; dividing the hydraulic fracture into N unit bodies of equal length and numbering them sequentially; and dividing a total calculation time t into meter fractions of time with equal interval; calculating a width of each unit body in the hydraulic fracture at the initial time; calculating a fluid pressure in the hydraulic fracture at the k-th fraction of time; calculating a closed pressure at an entrance of the natural fracture on an upper side and a lower side of the hydraulic fracture at the k-th fraction of time; and determining whether the natural fracture is opened by a determining criteria based on the above calculation results.
SOUTHWEST PETROLEUM UNIVERSITY
E E E
E21B E21B E21B
inventional inventional inventional
Jianchun Yong Yongjun Meiping Bin Xianjun Congbin Yang Chi Ye Yunchuan Cong
Guo Ren Xiao Li Qian He Yin Luo Chen Zhong Zheng Lu