Reservoir Of Comprehensive Evaluation About Depression Of Xujiahe Series In Western SiChuan

Xujia River of the west Sichuan is the one of most important assemblage zone of gas ,source of hydrocarbons in abundance sandstone development and many sorts of traps in Xujia River of the west Sichuan, But the zone of west Sichuan undergoed very complex in local structure evolution aspect, oil and gas reservoir change ang recombine ,it is very unconventionality, it belongs to the compact and low porosity container rocks. These for this reservoir recognition and fluid characteristic have all brought the very big research difficulty.Based on the above reason,to conduct the research of this region synthesize the well log and seismic technology and geolog.Above of all,we analyse log data, Considering the ambiguity in identification of complex lithology,according core data erect calculata model of container rock,calculata shale and por and sw and perm in every well,offer exactitude data base for geolog model of container rock. We use BP-neural network method to recognize fluid in container rock,erect the forecast model of recognize fluid. Combining the production of general log and especially log to dispose and explain,we use FMI log to recognize fracture and calculate parameter of fracture,research distributing rule of fracture in container rock, evaluate the status of fracture,using DSI log to pick up and analyse the gas sign,erect the model of recognize fluid. On the base of seismic interpretation, we made an acoustic impedance inversion in xinchang and fenggu and hexingchang and xiaoquan zones,we made GR inversion and por inversion in part important zone,it have good guide's function for forecast the phase zone. We using frequency spectrum imaging and attribut of seismic to analyse sand,using identification of lithology and inversion of production to erect model of sequence geolog,research sedimentary facies distribute in most sand.We erect geolog model of container rocks' parameter,according sand rule of distribution and seismic's forecast,combining sedimentary facies and analyzing sequence character to forecast avail sedimentary facies and avil zone of container rocks.