The Ifne Geologic Study Of Ann1-Ann97Buried Hill Reservoir

Ann1-Ann97damintun sag is of the fractured metamorphic buried hills reservoir, oilproperties for high pour-point oil. At present reservoir facing north side and producing extentis low, the principal part of the southern water injection water channeling serious, waterinjection effect by not balanced seriously restricted the reservoir development effect of thefurther improved.Ann1-Ann97general form, buried for north east high, southwest low fault blockmountain, swire boundary strata mainly by the anshan group of metamorphic composition, thelithology is mainly the depth of the metamorphic mainly mix granite, qianshan internaldevelopment NE and EW two groups of subprime is fault, NE to fault more. Reservoir spaceto crack and micro cracks is given priority to, the main direction for north crack east to northne, north west to east and near to high Angle fracture is given priority to, the average densityof crack article69.6/m. Through a variety of means to predictions that the crack faultinterchange and structural parts, high main part, the crack a development, side, north andfracture development degree are relatively poor. Through reservoir log evaluation, implementthe reservoir of the classification of the electrical standards and property standards, resistivitygreater than60m less than2500m, time more than55μ s/in can be divided foreffective reservoir. According to the standard implemented reservoirs of the distributioncharacteristics, that is, the same area where the basic to the reservoir, but the thickness isbigger, uneven distribution, have certain heterogeneity, vertical south block1piece ofreservoir, no obvious block sex, reservoir is relatively concentrated, for the thick lump, andnorth of97and the reservoir, the side of the gender is obvious part layer, have2~3fracturedevelopment section. Oil mainly concentrated in the top to-3000m buried,-more than3000MB for dry layer. The principal part of the southern buried think for massive reservoir, thenorth and side for layer reservoir. According to the type of reservoir, and puts forward thesuggestion to improve development effect, for southern diversified water injection is givenpriority to, the north and side use "vertical Wells+horizontal well" combination waterinjection.