EXPLANATION OF SEDIMENTARY FACIES BY NATURAL GAMMARAY LOG MORPHOLOGICAL FEATURE OF ROCKS GRAIN SIZE SEQUENCE

In this paper,correlation relation of natural gammaray log and rock grain size in deltaic deposit environment are analyzed. Moreover, mathmatical methods of data processing are used, to quantize natural gammaray log mor phological feature, well log morphological standard feature model corresponds to sedimentary facies and automatic explaination type of sedimentary facies by computer are set up.