Ⅰ. INTRODUCTION From the considerations of the scattered oil occurrences and suitablegeological structures, the Red Basin of Szechuan has long been regarded as apromising country for oil prospecting. In the last decade much attention hasbeen paid by geologists and engineers to the search for oil resources in certain I. INTRODUCTION From the considerations of the scattered oil occurrences and suitable genetic structures, the Red Basin of Szechuan has long been regarded as apromising country for oil prospecting. In the last decade much attention has been paid by geologists and engineers to the search for oil resources in certain