【作者】 倪军锋；

【导师】 侯恩科； 常振恒；

【作者基本信息】 西安科技大学 ， 矿产普查与勘探， 2011， 硕士

【摘要】 本文以沉积学、岩石学、测井学、层序地层学、构造地质学、石油地质学等理论为指导,采用“旋回对比,分级控制”的小层对比方法,系统研究了东濮凹陷河岸地区古近系沙河街组沙一段(Es1)地层特征,根据岩石学特征、沉积构造特征及测井相等相标志划分了沉积微相类型,分析预测了沉积微相及砂体展布特征,探讨了沉积微相与储层、油气分布规律的关系。河岸地区沙一段较为发育的砂体有三套,Es1上亚段7#-9#砂体、Es1下亚段3#-4#和1#-2#两套砂体,其中沙一下4#标志层附近储层最为发育,连通性好,沿南西部及西部物源方向砂体逐渐向北、北东方向减薄尖灭。对沉积微相研究的结果表明,沙一段为一套浅湖-半深水湖-三角洲前缘-前三角洲交替沉积环境,主要发育有水下分流河道、河口砂坝、分流间湾、前缘席状砂、远砂坝等沉积微相。在沉积微相研究基础上,结合研究区储层物性及油藏分布规律,分析认为最为有利储集相带是水下分流河道砂岩,河口坝砂岩次之。受河道迁徙冲刷影响,水下分流河道和分流间湾相间分布,形成良好生储盖组合形式。水下分流河道砂体不仅物性好,也是油气聚集有利场所,是今后勘探的主要目标,当其与构造高点得到合理配置时,常形成高产油流聚集区。更多还原

【Abstract】 This paper according to reservoir beds of 1st member of the Shahejie formation (Es1)of Hean area in Dongpu Depression, Taking sediment logy、lithology、Logging study、sequence stratigraphy、structural geology、petroleum geology etc theories as guidance, and adopting sublayer comparison method of“cycle comparison, grading control”, Are used to systematically research stratigraphic characteristics based on the study of geological background and divisions of sub stratums. The types of sedimentary microfiches are divided and on the basis of lithological characteristics, sedimentary structure characteristics and logging fancies. The paper predicts the character and trend of the distribution of sedimentary microfiches and sand body, and discusses the relationship between microfiches and reservoir, oil and gas distribution.There are three units relatively development of sand body of The 1st Member of Shahejie Formation in Hean-area, they are the 7#-9# of sandstone of Es1u and the 3#-4# and 1#-2# of two sandstone of Es1 d which, sand layer 4# marks nearly, reservoir most development, good connectivity, sand body gradually north, northeast thinning pointed out along the south west and west content source direction. Microfacies study of the results showed that the sedimentary environment is a period of main shallow lake-half a deep lake-delta front-former delta alternate sedimentary environment, which have been distinguished as follows subaqueous distributary river course,river-mouth bar, between tributary wan, front sheet sands, distal bar and other microfacies.The study based on the sedimentary fancies, combined with oil and gas distribution, analyzed that the most favorable reservoir fancies belt is the underwater distributary channel sandstone, followed by mouth bar sandstone. By the influence of river course, underwater distributary channel distributes alternating with interdistributary bay which forms the principal source-reservoir-seal assemblage mode. The underwater distributary channel sand bodies which should be the main destinations of exploration of this area in the near future is not merely good physical properly, it is also favourable places for hydrocarbon accumulation. Sand-body development and structural matching is the high-yield area in the study region, oil and gas accumulation in structural highs.更多还原