APPLYING HYDROCARBON EXPELLING INTENSITY TO PREDICT OIL-BEARING POTENTIAL OF THE GLUTENITE FAN IN DEEP SAG STAGE

Lithologic oil reservoir of the conglomerate fan-body developed in deep sag stage is the important target of oil-gas exploration in the mid-later term exploration in petroliferous basin, and it's oil-bearing potential is mainly dependent on the hydrocarbon expelling intensity of effective source rocks, the reservoir condition of gravel-sand fan-body and the result of their inter-action. It is found that the oil-gas full-up degree of fan-body has important relativity with the hydrocarbon expelling intensity, and it's accumulation effect is mainly affected by the reservoir condition if there is enough oil-gas resource in deep Dongying sag. The gravel-sand fan-body of displacement efficiency index over 15% and the hydrocarbon expelling intensity over 20×10⁴t/km²is prone to form reservoir of high oil-gas full-up degree, and that the sand body of thickness over 2m and porosity over 12% is suitable for forming reservoir. The method has been applied to the oil-gas exploration of the gravel-sand fan-body in deep Dongying sag stage and has obtained better effect, Therefore it can be used to guide the exploration of lithologic oil reservoir in deep sag stage of continental basin.