【作者】 董秀超；

【导师】 赵荣； 柳成志；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2009， 硕士

【摘要】 本文研究采用储层地质学、现代沉积学、层序地层学及储层评价等理论和方法及相关测试分析手段,从整个沉积盆地的区域地质背景及其古地理位置着手,以岩心、测井、钻井、测试分析资料为基础,对碎屑岩储层的岩石学特征、砂体分布、成岩作用、物性特征等,进行了深入的研究。利用薄片鉴定资料、岩心薄片照片研究储层岩石学特征,绘制了储层岩石类型三角图,得出,岩性以长石岩屑砂岩和岩屑长石砂岩为主,这为次生孔隙形成提供了物质基础;成分、结构成熟度总体较低。储层粒度以中-细砂岩为主。填隙物主要为碳酸盐岩和泥质。经统计岩心物性资料表明,储层孔隙度、渗透率都比较低,主要为特低孔特低渗～低孔特低渗储层。通过对薄片、扫描电镜的观察,研究发现白垩-古近系砂岩孔隙类型以次生孔隙为主,裂缝和残余原生孔次之,成岩作用类型主要有机械压实作用、胶结作用、石英次生加大、交代作用和溶解作用。根据成岩作用研究结果,白垩-古近系储层成岩阶段基本上进入中成岩A1亚期,甚至进入中成岩A2亚期。次生孔隙发育程度主要受胶结、石英和长石次生加大、溶解作用影响。利用了钻井、测井、地震等资料,预测了砂体展布。最终结合储集体的宏观展布、物性变化、成岩演化、孔隙结构特征等多方面的研究认识,综合评价有利相带及有利储层分布区,为深入油气勘探提供良好的科学指导。更多还原

【Abstract】 According to using the theories and techniques of reservoir geology, modern sedimentology, sequence stratigraphy and reservoir evaluation to research thoroughly the feature of lithology, the distribution of sand body, lithogenesis and the physical property of the clastic reservoirs, started from the regional geology background of the whole sediment basin and its ancient geology location,based on the information of core, logging, drilling, testing data.Drawing triangular diagrams of the reservoir rock types based on the research of lithology feature which is obtained from the study to wafer data and core wafer. From the triangular diagrams, feldspar sandstone and lithic arkose are the main lithologies, this is beneficial to generate secondary pores; Compositional maturity and texture maturity are both low. The general class of reservoir is middle-fine sandstone. The general shimming materials are carbonatite and mud. From the calculated datum of core physical property,the porosity and the permeability is both low, so the reservoir is from especially low porosity and especially low permeability. According to the analysis of wafer and scanning electron microscope, the secondary pores are the main pore type of cretaceous-paleogene, the second ones are splits, inflexible ompation, ementation, uartz overgrowth, metasomasis and dissolution are the main diagenesis types. According to the analysis of diagenesis, cretaceous-paleogene’s the diagenetic stage basically entered in the middle diagenetic stage A1, or even to enter in the middle diagenetic stage A2. The second pore growth degree is mainly influenced by cementation, quartz, feldspar and diffluence. Forecast the distribution of sand body, on the basis of logging, drilling, testing data.Finally combining the research and understanding of the regional reservoir distribution, physical groperty variation, diagenesis evolvement, pore structure, etc, generally evaluate the advantageous fades belt and advantageous reservoir distribution, which will be a good scientific guidance to improving the oil and gas eiploration.更多还原