【作者】 孟庆新；

【导师】 柳成志；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2010， 硕士

【摘要】 本文综合利用层序地层学、沉积学、构造地质学、石油地质学等理论和方法,运用地震、测井、录井、岩心等资料,对乌南地区南屯组地层的层序地层格架、沉积相进行了深入细致的分析和研究。同时,结合前人研究成果,利用上述研究成果对有利区储集相带进行预测。成果对今后该区油气勘探开发及井位部署具有实际的指导意义。在认真借鉴和分析前人研究成果的基础上,通过井震结合,实现了钻井分层与地震界面的统一,建立了四级层序地层格架。将南屯组地层自下而上划分为两个三级层序,即层序SQN1和层序SQN2,且每个三级层序内部各个体系域均发育完全,两个三级层序的分界面位于岩性和电性的转换面,界面之下局部削截,界面之上为上超。层序SQN1内部自下而上划分为四个四级层序单元,即N1SQ1、N1SQ2、N1SQ3及N1SQ4。层序SQN2内部自下而上划分为三个四级层序单元,即N2SQ1、N2SQ2及N2SQ3,且每个四级层序内部各个体系域均发育完全。通过对构造沉降、气候变化、沉积物供给和湖平面变化等层序控制因素的分析,阐明了各种控制因素对层序发育的影响作用。研究认为,构造沉降是控制断陷期层序地层发育的主要因素。综合露头、地震、钻-测井等资料,明确了南屯组沉积相、沉积模式和沉积体系展布特征。南屯组发育的沉积相类型主要有:辫状河三角洲相、扇三角洲相、湖泊相及湖底扇相。综合以上研究成果,指出研究区内的有利储集相带,预测工区内有利勘探目标。更多还原

【Abstract】 Based on the theories and methods of the sequence stratigraphy, sedimentology, structural geology, petroleum geology, as well as the analytical data of seismic, well logging, core, the author analyses and studies the sequence stratigraphic framework and precipitation facies of the NanTun formation in the southern area carefully and deeply. At the same time, combines with the research results of previous studies and the initial work above, the author carries on the forecast about the reservoir facies. The results have actual guiding significances on the future hydrocarbon exploration and development as well as the allocation of the well location in the area.On the basis of analysing and drawing on the experience of the results of previous studies carefully, we success on the unification of the drilling stratification and the seismic interface, and establish the sequence stratigraphic framework combining the well logging with seismic. At last, we divide the NanTun formation into two third-order sequences from bottom to top, as SQN1and SQN2. All system tracts are fully developed in each third-order sequence. The interface of the two third-order sequence is located at the conversion surface of the lithology and electrical. The interface presents the character of partly truncation below, and it presents the character of onlap above. Finally we divided SQN1 into four fouth-order sequences from bottom to top, as N1SQ1, N1SQ2, N1SQ3 and N1SQ4. We also divide SQN2 into three fouth-order sequences from bottom to top, as N2SQ1, N2SQ2 and N2SQ3. All system tracts are fully developed in each four-order sequence.Through ananlyse the controlling factors on the sequence such as structure subsidence, climatic change, sediment supply and lake level changes in the research area, we interprete the effects of various controlling factors on the sequence development. The finding suggested that structure subsidence was the main factor on controlling the layer sequence development of the faulted period.Combining with the data of crop, seismic, well drilling and logging, the characters of precipitation facies, depositional model and depositional systems distribution of the NanTun formation are defined. The main precipitation facies in the NanTun formation are Fan-delta, braided fluvial delta , lacustrine and Lake Floor fan .Finally, considering of the research above, we point out the favorable reservoir facies.更多还原