Title:
METHOD AND DEVICE FOR DETECTING CRACK IN LAYER IN PERIPHERY OF BOREHOLE WALL
Document Type and Number:
Japanese Patent JPS60183578
Kind Code:
A
Abstract:
A method and apparatus using a multiple transducer acoustic logging tool to detect fractures surrounding a borehole, particularly fractures that do not intersect the borehole wall. The transducers are actuated to produce broad band width pulses and signal enhancement techniques are used to determine fracture width, orientation and distance from the borehole wall.
Inventors:
ROTSUKO DEIFUOTSUJIO
Application Number:
JP2078485A
Publication Date:
September 19, 1985
Filing Date:
February 05, 1985
Export Citation:
Assignee:
SHELL INT RESEARCH
International Classes:
G01V1/40; G01V1/44; E21B49/00; G01V11/00; (IPC1-7): E21B49/00; G01V1/40
Domestic Patent References:
| JPS5225408A | 1977-02-25 | |||
| JP45032041A | ||||
| JPS503721A | 1975-01-16 |
Attorney, Agent or Firm:
Yoshio Kawaguchi