论文部分内容阅读
利用三维有限单元法计算了过井单一倾斜裂缝的双侧向测井响应;结果表明,随着裂缝倾角的增大,响应曲线将变得平缓。对无限侵入(裂缝中充满泥浆)的情形,在裂缝中点处,当倾角小于临界角时,深浅侧向电阻率之间表现出负差异;当倾角大于临界角时,深浅侧向电阻率之间表现出正差异。在不同倾角下,深浅侧向电导率随裂缝张开度的增大而增大;当倾角不变时,深浅电导率之差与裂缝张开度几乎成正比关系。
The dual lateral well logging response of a single inclined fracture in a well was calculated by using the three-dimensional finite element method. The results show that the response curve becomes gentle as the fracture dip increases. In the case of infinite invasion (fractures filled with mud), at the midpoint of the fracture, when the dip angle is less than the critical angle, there is a negative difference between the depth resistivity and lateral resistivity; when the dip angle is greater than the critical angle, Between the positive differences. Under different inclinations, the depth of lateral conductivity increases with the increase of the crack opening degree. When the inclination is constant, the difference of depth and conductivity is nearly proportional to the crack opening.