Sedimentary Model of the Putaohua Reservior in the Yushulin Oilfield in the Songliao Basin
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摘要: 葡萄花油层是大庆外围榆树林油田刚刚投入开发的一个主要产油层。本文从取心井出发,通过储层层次划分及单井相分析,利用大量地质,测井资料详细研究了榆树林油田葡萄花油层储层沉积微相特征,确定葡萄花油层属于河控三角洲沉积,发育三种亚相:三角洲水上平原亚相,三角洲外前缘亚相,三角洲内前缘亚相,进一步划分为八种微相:水上分流河道,河间洼地,河间沼泽,水下分流河道,河口坝,支流间湾,席状砂和三角洲前缘泥。在此基础上,编制了各小层沉积微相平面展布图,结合区域地质特征,首次建立了榆树林油田葡萄花油层储层沉积模式。Abstract: as a river dominated delta deposit. It develops three kinds of subfacies delta above一water plain,deltain-ner front and delta outer front. On the basis of this,it can be subdivided into eight kinds of microfaciessurficial distributary channel, interchannel area, interchannel swamp, subaqueous distributary channel,debouch bar,inter distributary bay,sheet sand and delta front mud. The plane distribution feature of sedimentary fades is that from northwest to southeast, delta plain,delta inner front, delta outer front appear in order. Different microfacies overlie and interlace with eachother.Distributary channel sandbody and debouch bar sandbody the main sandbody framework of delta. Combining research results of crofacies analysis on a single well with plane distribution featuresof sedimentary microfacies, the sedimentary model of the Putaohua reservior in the Yushulin oilfield isbuilt finally. It objectively shows sedimentary featuers of the Putaohuaerervior and provides acertaingeological evidence for further oilfiekl development.
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Key words:
- riv er一dominated delta /
- sedimentary microfacies /
- depositional model
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