摘要:
综合运用地质、测井、地震及分析化验等资料,对沾化凹陷东部长堤地区沙河街组沙三段沉积体系及亚相微相类型进行了较为全面的研究,认为沙三段主要发育近岸水下扇沉积。其中,中扇亚相最为发育,并可细分为辫状水道、水道间和前缘过渡带3个微相;其次,根据粒度分析、物性特征、压汞分析、镜下观察、扫描电镜分析及测井资料数字处理成果等资料,对该区沙三段储集层的岩石类型、微观孔隙结构、成岩阶段、层内及平面非均质性等进行了综合研究,指出了该地区沙三段有利储集体及有利储集层位。
Abstract:
The sedimentary system and facies typies in the third section of the Paleogene Shahejie Formation of Chang didistrict in the Zhanhua Sag have been studied by using the geolo gical,log,seismic and chemical analysis data.The authors consider that the main type of sedimentary facies was subsurface fan,which can be divided 3 types of subfacieses-root-fan,middle-fan and fan edge.The middle-fan can be divided 3 microf acieses-braided channel,space between channel and front-edge zone.Secondly,rock composition,micro-tex ture of pore,diagenetic stage and hetero geneity of the reservoirs have been systematically studied by comprehensive using granulometric analysis,reservoir capability,mercury penetration analysis,electronic microscope scanning,the digital processed achievements of log data and etc.At last,the authors point out the favorable sand bodies and reser voir beds-the upsides and middle part of the third member of the Shahejie Formation.
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