Method and apparatus for exploration of geological formation tilt in boreholes
US4251773A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1978 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Jun 14, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus are disclosed for investigating lateral characteristics of an earth formation penetrated by a borehole. Substantially identical measurement transducers are mounted in a fixed separation, side-by-side relationship on a pad adapted for sidewall application. As a pad traverses the borehole, measurement signals are produced corresponding to the same formation investigation conducted along two side-by-side paths on the borehole wall. The signals are recorded and provide an indication of lateral changes between the side-by-side paths. By comparing the signals with varying depth displacements, the best likeness and corresponding displacement are determined and provided as an indication of lateral inclination of the formation. The best likeness indicates a lateral formation homogeneity characteristic and the displacement the inclination of the lateral characteristic between the side-by-side paths. In a multipad embodiment, the lateral characteristic determination is made for each pair of side-by-side paths around the borehole and combined to provide the dip of lateral characteristics which persist to some degree around the borehole. When side-by-side transducer pads ar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.