I . INTRODUCTION
Currently, different scholars define data mmmg
variously, but the core ideas are the same: data mining is
a process of extracting implicit, previously unknown, but
potentially useful information and knowledge from a
large quantity of incomplete, noisy, ambiguous and
random data in the practical application[I-31. In the oil and
gas exploration and production, the data mainly is
composed of petrophysical data, logging data, seismic
data and geological data. In addition, well log data,