Oil and Gas Potential Prediction Method of Complex Clastic Rocks in Deep Carboniferous Strata in Tahe Oilfield
The carboniferous karashayi formation in Tahe oilfield is deeply buried,with thin sand and drastic vertical and horizontal changes.There are bottlenecks of geological knowledge and research methods in the distribution characteristics and the discrimination of oil and gas properties of sand bodies,which seriously restrict the evaluation of favorable zones in this layer series.Through normal distribution method,sensitive parameter intersection graph method and the Fisher method provide a secondary interpretation of logging data,forming fluid identification standards and charts.By utilizing frequency division attribute tuning effects and phase controlled inversion techniques,effective identification of thin sand bodies is achieved.It is clear that controlling faults,structures and lithology are key factors for reservoir formation control.Based on this,the principle of optimum selecting potential zones is determined,and a method for predicting the oil and gas potential of carboniferous reservoirs is established.The efficiency of reservoir potential prediction has increased from 45%to 80%,providing technical reference for the potential evaluation of ultra deep and thin sand layers.
万方数据
维普
