Southwest Petroleum University

China National Offshore Oil Corporation

China Oilfield Services, Limited

Unilever Plc

Unilever, N.v.

Ye Zhong

Chi Chen

Yi Zhou

Cong Lu

Jianchun Guo

Congbin Yin

Kun Wang

Zhihong Zhao

Meiping Li

Yunchuan Zheng

Yong Ren

Xianjun He

Yuxuan Liu

Jie Lai

Andrew Stephen Jamieson

Qingsheng Tao

Li Ma

Yuhang Zhao

Shouxin Wang

Gangzhi Liu

Junfeng Li

Yang Luo

Mingzhong Chen

Bin Qian

Chuhao Huang

Yongjun Xiao

Fenglan Huang

Shexia Dong

Yuesong Liang

Yancai Gao

Micaela Granero

Dong Wang

Huan Zhou

Wenjia Cheng

Mingjuan Liu

Liangqing Li

A method for characterizing complexity of rock fracture based on fractal dimension and a device thereof are provided. The method includes steps of: collecting rock fracture samples of a rock, and collecting basic parameters of the rock; determining a fractal dimension of a rock fracture morphology of the rock; calculating the fractal dimension of the rock; calculating a complexity coefficient Fc of rock fracture of the rock; and characterizing a complexity of rock fracture of the rock based on the complexity coefficient Fc of rock fracture of the rock. In the present invention, combined with the fractal geometry theory, fracture complexity coefficient of shale rocks is redefined and calculated to accurately characterize rock fracture morphology, so that characteristics of rock fracture morphology is correctly understood and affecting factors of fracture morphology is analyzed.

Method for characterizing complexity of rock fracture based on fractal dimension and device thereof

The invention discloses a method for experimentally determining the conductivity of an unpropped fracture in hydraulic fracturing of a shale reservoir, comprising: select an outcrop sample with a natural fracture in the shale reservoir, and cut the outcrop sample with along the extension direction of the natural fracture into no less than eight square rock slabs; use a laser scanner to obtain the rough topography data of the fracture surface of each square rock slab and calculate the area tortuosity; pick out the rock samples; model the rough surface of the selected rock samples; import the treated surface model into the engraving machine, and select the downhole core or outcrop rocks in the same horizon for repeated production; calculate the shear slippage at different positions of unpropped fracture according to the data of the shale reservoir; finally test the conductivity of the shale rock samples after shear slip.

Method for experimentally determining the conductivity of unpropped fracture in hydraulic fracturing of shale reservoir

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.

Method for acquiring opening timing of natural fracture under in-slit temporary plugging condition

Growing community of inventors

Chengdu, China

Ye Zhong