Abstract:Tight tuffaceous sand reservoirs in the lower part of Jiufotang Formation,Luxi Depression,Liaohe Basin have strong heterogeneity,and oil production may have a big difference between adjacent wells in the same trap.In order to find favorable tight reservoirs,core data are used to analyze cha- racteristics of these tight reservoirs.On this basis,corresponding seismic approaches are used for fracture prediction and hydrocarbon detection to determine enrichment favorable zones.The study shows that a favorable area in Well M31 is distri buted in the north-south direction.Our prediction results are in very good agreements with drilling results,indicating that our approach can be used to study similar tight sand reservoirs.
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