【作者】 朱美衡；

【导师】 郭建华；

【作者基本信息】 中南大学 ， 矿产普查与勘探， 2006， 博士

【摘要】 塔中地区油气资源丰富，具有生油层系多、储集层系多的特点。目前已在塔中低凸起带及其北缘发现了工业油气藏，因此，该地区是今后油气勘探的重点。但目前中石化在该区勘探、研究程度比较低，需要对该区前人所做的工作及基本石油地质条件有一个系统的了解和科学的总结，力争在该区油气勘探上有新的突破，进而提出下步勘探的有利区块。 本文在对区域地质背景和区域层序发育特点进行详细研究的基础上，以层序地层学的基本理论为指导，综合岩芯、测井和地震资料对研究区目的层段进行了测井—地震结合的层序地层划分和对比，并对层序地层格架、沉积相、岩相古地理特征、成岩作用以及储层特征等进行了详细的研究，在此基础上对目的层段有利勘探区块优选做出了客观评价。本文主要取得如下认识： 通过钻、测井资料、地震追踪和单井沉积相分析，在区内共划分出6个标准的三级层序，其中东河砂岩1个，石炭系划分出了5个，并总结出区内层序地层格架模式。 通过对东河砂岩地震反射特征的归纳总结，结合钻井分层，对东河砂岩的边界进行新的圈定，并识别出新的东河砂岩可能存在的区块。 通过对研究区内储集砂体展布特征的研究，结合已建立的层序地层格架，区内主要的储集砂体明显地受层序格架的控制，高位体系域中砂体发育、分布广，海侵体系域中砂体不发育。东河砂岩与石炭系层序中主要的储集砂体分布在高位体系域中。 根据岩石薄片、铸体薄片的观察和扫描电镜及阴极发光等分析实验结果，区内碎屑岩系主要的成岩作用有压实(压溶)作用、自生矿物的胶结、交代和充填作用及溶蚀作用等。成岩作用阶段主要还处于早成岩B期—晚成岩B期。主要的储集空间是粒间孔隙，以次生溶孔为主，原生孔次之。 通过对区内沉积、储层、成岩作用的综合研究，总结出影响碎屑岩储集物性的因素有：①受沉积环境控制的原始沉积物质的影响；②受控于层序地层格架的影响；③碳酸盐含量对储集物性的影响；④成岩作用对储集物性的影响；⑤构造运动对储集物性的影响。 碳酸盐岩的成岩作用主要有胶结作用、准同生白云石化作用、溶更多还原

【Abstract】 The Central-Tarim area is rich in oil and gas with the characteristics of multiple source series of strata and multiple reservoir layers. So far commercial hydrocarbon reservoirs have been discovered within the low-arch belt and on the north edge of the Central-Tarim area. Therefore, this region is a promising zone for the future petroleum exploration. However, the exploration and study projects that have been undertaken by SINOPEC remain at lower degree in this region. Thereby, it is necessary to systematically understand and summarize the precursors’ achievements and the basic petroleum geology conditions in this region, in order to achieve new breakthrough in the exploration for petroleum ,and provide favorable blocks for future exploration in this area.In this paper, on the basis of the detailed researches of the regional geological setting and sequence development, guided by the basic theory of sequence stratigraphy and combined with the synthetic analyses of core , well log, and seismic data, the classification and correlation of the sequence stratigraphy by using the integration of well and seismic data were performed for the target intervals in the area. And this paper also studys in detail the sequence stratigraphic frameworks, sedimentary facies, paleo-geography, diagenesis and reservoir characteristics. Based on these research, the favorable exploration areas have been evaluated. The conclusions of this paper are as bellow:With the analysis of drilling results, well log data , seismic tracing and individual well depositional facies analysis ,Six third level sequence stratigraphy have been identified. Among them, 1 is in Donghe Sandstone, 5 is in Carboniferous, and the model of sequence stratigraphy framework has been established.With summarizing the characters of Donghe sandstone seismic reflection and drilling stratigraphy, the limits of the distribution of the Donghe sandstone are redelimited and the new possible blocks containing Donghe sandstone are identified.更多还原