Reservoirs Forecast And Research In Shuguang Middle Buried-hill Region

Shuguang middle buried-hill region is located in the middle of the western ramp of western sag on Liaohe basin. The useful reservoir anticipation is difficult due to complicate characteristic of lithology, intensive variety of surfaces and inside chaotic seismic reflection configuration. Reservoirs of buried-hill belong to metamorphic rock and carbonatite fracture system. In the developed region, especially inside of buried-hill, the developed characteristic of useful reservoirs is more difficult to forecast. By using reservoir characteristic information, drilling/well-logging data, seismic special processing results, based on core calibration logging, analysis of seismic attribution, comparison of electrical property of buried-hill strata, the spatial distribution of fracture system in buried-hill inside was researched. The stratigraphic sequence framework was built up, dip-strike and lithologic distribution of inside were eatablished. In metamorphic rock zone of buried-hill, the trend is west-north and dip angle is 20-25°.In developed region of carbonatite, the trend is east-north and dip angle is 30-35°. The whole rift system appears three sets of faults and strike dips are east-north, near west-east, west-north.. The forer acts on zoning of south-north zone, the latter acts on blocking of near west-east zone. The new and old fault styles appear"入"shape distribution in sections. The east-north trend and west-down normal fault emerged between early stage of ShaHejie formation and Primary group. The east-down normal fault disappeared upwards in Guantao formation, ended downwards on west-down and opposite direction fault surface .Lithologic characteristic, physical property and useful fracture zone were also anticipated. Moreover, integrating drilled well data with comprehensive evaluation of local trap, optimize six survey targets, and advanced implement three preferred sites. The predicted result was coincident with drilling/well-logging data, and distinguished economic benefit and social benefit were also acquired...