大牛地气田山西组岩相及沉积相平面分布研究

发布时间：2018-03-02 04:06

本文关键词： 大牛地气田山西组岩相沉积相沉积模式　出处：《成都理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：鄂尔多斯盆地大牛地气田位于鄂尔多斯盆地东北部塔巴庙地区,构造部位处于伊陕斜坡上,构造平缓,断层不发育,属非均质性强的致密砂岩气藏。本论文以现代沉积学、岩相古地理理论为指导,充分利用钻井岩芯、测井资料,以鄂尔多斯盆地大牛地气田山西组为研究对象,通过单井地层划分,将山西组划分为山1段、山2段两个段,自下而上进一步划分为:山1-1、山1-2、山1-3、山2-1、山2-2、山2-3六个小层。在岩相识别图版建立基础上,系统研究了山1-1、山1-2、山1-3、山2-1、山2-2、山2-3六个小层的岩相平面分布。通过钻井岩心观察及测井资料分析,建立了山西组岩石颜色、岩性、沉积构造、生物标志、粒度概率曲线、测井相剖面结构等7类沉积微相识别标志。在上述沉积微相识别标志研究基础上,将大牛地气田山西组划分为三角洲平原亚相,可进一步识别出分流河道、洼地、天然堤、决口扇、泥炭沼泽微相,并系统研究了各类沉积微相特征。在单井沉积微相特征及钻井间沉积微相对比研究基础上,系统编制了大牛地气田山西组各小层沉积微相平面分布图。研究了其平面分布及垂向演化特征,最终建立了山西组沉积期发育的沉积模式。
[Abstract]:Daniudi gas field in Ordos basin is located in Tabamiao area, northeast of Ordos basin, and its structural position is located on the Yishan slope. The structure is flat, fault is not developed, and it is a dense sandstone gas reservoir with strong heterogeneity. Guided by the theory of lithofacies and paleogeography, taking Shanxi formation of Daniudi gas field in Ordos Basin as the research object, Shanxi formation is divided into two sections, namely, Shan 1 and Shan 2, according to the theory of lithofacies and paleogeography. It is further divided into six sublayers: mountain 1-1, mountain 1-2, mountain 1-3, mountain 2-1, mountain 2-2, mountain 2-3. The lithofacies plane distribution of Shan 1-1, Shan 1-2, Shan 1-3, Shan 2-1, Shan 2-2 and Shan 2-3 are systematically studied. The color, lithology, sedimentary structure, biomarker and granularity probability curves of Shanxi formation are established by drilling core observation and logging data analysis. On the basis of the study of the above sedimentary microfacies identification markers, Shanxi formation of Daniudi gas field is divided into delta plain subfacies, which can further identify distributary channels, depressions, natural dikes, etc. The crevasse fan, peat marsh microfacies, and various sedimentary microfacies are systematically studied. On the basis of the comparative study of sedimentary microfacies in single well and in drilling, The sedimentary microfacies plane distribution maps of Shanxi formation in Daniudi gas field are compiled systematically. The plane distribution and vertical evolution characteristics of the sedimentary microfacies are studied. Finally, the sedimentary model of the sedimentary period of Shanxi formation is established.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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