Progress and development directions of stimulation techniques for ultra-deep oil and gas reservoirs

LEI Qun,XU Yun,YANG Zhanwei,CAI Bo,WANG Xin,ZHOU Lang,LIU Huifeng,XU Minjie,WANG Liwei,Li Shuai

Table 1 Judgment for forming fracture network in ultra-deep wells in Kuqa pediment and application in typical wells.

Fracture type Typical well Fracture density/m Number of crossed fractures Stress direction NF strike NF inclination/ (°) Complex network fracture KS8-1 9.93 171 NE15° Complex and various 80 Medium network fracture KS8 5.85 81 NE45° Complex and various 83 Slight network fracture KS11 6.20 42 NW20° NE45° 83 Simple fracture KS505 7.80 NW30° NW5° 81 Simple fracture KS10 2.35 NW10° NW75° 60