oa USING LOGGING DATA TO ESTABLISH A METHOD OF S1 CALCULATION AND EVALUATE OIL-BEARING PROPERTIES OF SOURCE ROCKS, SONGLIAO BASIN

The calculation model is established by using interval transit time and resistivity curves to calculate the rock pyrolysis parameter S1, so as to evaluate the oil-bearing property of source rocks. S1 of 168 wells are calculated by this method, and 71 wells of them have been measured S1 from core samples. Comparing the difference between the average value of calculated S1 and measured S1,it can be seen that the more samples measured S1 in a single well, the smaller the difference between the calculated S1 and the measured S1. By drawing several well-connected sections and S1 plans, the changing trend of oil-bearing property of source rocks in study area is definited, and the favorable oil-bearing areas are pointed out. This S1 calculation method is suitable for the oil-bearing evaluation of regional source rocks and has guiding significance for exploration.