Compared with the traditional data storage method, the application of the USB HOST technology will improve the convenience of the well logging instrument and make data storage easy.

There are four kinds of error sources for logging data: method error, environment error, instrument error and error caused by negligence of operators.

The research work in this thesis is described as follows: 1 According to the theory of the electrical logging, a design for the detective instrument for sensing oil-well data is presented.