Strike - dip, development degree and horizontal stress of the natural fracture in oil well perforated intervals affects operated fracturing pressure directly.
油井射孔段天然缝产状、发育程度、水平应力大小直接影响着压裂施工压力。
2
Degreeof metamorphism steps up along the strike from south to north, whereas steps up along the dip in company with depth.
在走向上煤的变质程度由南向北逐渐增高，在倾向上煤层随赋存深度的增大变质程度逐渐增高。
3
Related experiments of voltage dip control also been done, which also give the correctness of the theory in the certain degree.