The application of micro-quake suspecting technology at Chang-6 layer of Nanniwan oilfield

Based on micro-quake suspecting technology,the authors studied what the shape fracturing may made in the Chang-6 layer of Triassic system of Nannwan oilfield,and took experiments on six particular oil well of Nanniwan oilfield.The results show that the fracture is vertical at the buried depth between 650.0 m and 797.0 m and the fracture is horizontal at the buried depth between 349.0 m and 383.0 m.The extension of the vertical fracture is 138.0～149.3 m,the largest fracture direction is 108.9°,and the least one is 58.0°.The extension of the horizontal fracture is 99.1～117.4m,and the smallest fracture direction is 76.6°.