Prediction Of Sedimentary Facies And Channel Sand-body In North Qijia Area Of Songliao Basin

At present, we have found a large number of lithologic reservoir in the songliao basin and shallow, andthe root cause of the channel sand body reservoir is one of the main types of lithologic reservoirs.According to estimates, there are plenty of potential oil and gas resources will be found in the lithologictrap, it will be a reserves replacement area in the future. With the improvement of exploration degree,proved reserves of lithostratigraphic reservoirs account for a growing proportion. The Angle of thesedimentary system, sedimentary facies belt, the lithofacies in lake basin sedimentary system, the deltasystem is the most beneficial to the growth of lithologic hydrocarbon reservoir, and the delta frontunderwater distributary channel, mouth bar is one of the "dessert".The research topic is derived from the explain production project in northern songliao basin, the studyfirstly on the basis of structure and lithology interpretation, based on the analysis of the regionalsedimentary background. secondly, using Landmark software to carry out multi-attribute analysis andoptimization for main target reservoir in the studied area. Then integration of sandstone reservoir predictionresults with JASON and Geo-Office joint inversion technique. The final use Double Fox drawing softwareto target zone of sedimentary micro facies, sedimentary facies prediction research, and analyzes thefavorable reservoir in the area, further showing the distribution channel sand body.Due to the influence of qiqihar in northern provenance. The period of Saertu and putaohua reservoirsedimentary, This area has experienced the process of the water inlet retreat and remained Delta frontsubfacies deposition of superimposed channel, it mainly braided river distribution; The period of GⅢreservoir sedimentary, it is a continuous annealing process and remained the Delta front subfaciesdeposition, sandstone development degree is higher; The period of GⅣ reservoir sedimentary is on thebasis of shallow-deep lake facies,to start water deposit back,and coverd with outside the delta frontsubfacies, the development degree of reservoir sandstone group of GⅢ and GⅣ were higher, the types ofsand body in the sand is given priority to sheet, lenticular sandstone and thick sand layer of strip; Theperiod of FⅠ reservoir sedimentary, it experienced the process of change that the water inlet retreat,coverd with delta front and distributary plain facies, sandstone development degree is higher, the channel isgiven priority to with meandering river. Under the effect of formation overpressure, the oil and gas alongthe fault and fuyu reservoir, reservoir into the Gaotaizi and Fuyu reservoir. The accumulation mode of Fuyureservoir is store type, Gaotaizi reservoir is laying on the store and the author classifies type, The oil andgas of Saertu and Putaohua reservoir mainly comes from the upper of the Nenjiang formation and lowerqingshankou formation hydrocarbon source rocks, this reservoir accumulation model is On the birth ofreservoir type and source and upper reservoir type. In comparison, the source reservoir cap compounding relations of Gaotaizi reservoir is better, which in turn of Fuyu oil layer, Saertu reservoirand Putaohua reservoir.