公开(公告)号：US6088655A

公开(公告)日：2000-07-11

申请号：US943094

申请日：1997-09-26

申请人： William D. Daily ,  Clifford Schenkel ,  Abelardo L. Ramirez

发明人： William D. Daily ,  Clifford Schenkel ,  Abelardo L. Ramirez

IPC分类号： G01V3/24 ,  G06F19/00

CPC分类号： G01V3/24

摘要： Electrical resistance tomography (ERT) produced from measurements taken inside a steel cased borehole. A tomographic inversion of electrical resistance measurements made within a steel casing was then made for the purpose of imaging the electrical resistivity distribution in the formation remotely from the borehole. The ERT method involves combining electrical resistance measurements made inside a steel casing of a borehole to determine the electrical resistivity in the formation adjacent to the borehole; and the inversion of electrical resistance measurements made from a borehole not cased with an electrically conducting casing to determine the electrical resistivity distribution remotely from a borehole. It has been demonstrated that by using these combined techniques, highly accurate current injection and voltage measurements, made at appropriate points within the casing, can be tomographically inverted to yield useful information outside the borehole casing.

摘要翻译： 电阻层析成像（ERT）由钢套筒内测量产生。 然后，在钢壳内进行电阻测量的断层反演，以便远程地从井眼成像地层中的电阻率分布。 ERT方法包括组合在钻孔的钢壳内进行的电阻测量，以确定邻近钻孔的地层中的电阻率; 以及由没有用导电外壳套管的井眼进行的电阻测量的反转，以确定远离钻孔的电阻率分布。 已经证明，通过使用这些组合技术，在壳体内的适当点处制造的高精度电流注入和电压测量可以被层析倒置以产生井眼外壳之外的有用信息。