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川东地区下三叠统飞仙关组成岩作用及对储层的影响

Diagenesis and Its Influence to the Reservoir of Feixianguan Formation in Lower Triassic, East Sichuan

【作者】 王思仪

【导师】 张帆; 王兴志;

【作者基本信息】 西南石油大学 , 矿物学、岩石学、矿床学, 2006, 硕士

【摘要】 本文以碳酸盐沉积学和成岩作用原理和方法为基础,以碳酸盐岩储层地质学理论为指导,采用多学科、多技术的综合分析方法,配以先进的分析测试手段,重点对川东地区飞仙关组沉积相、成岩作用、储层特征、储层控制因素及分布等作了广泛而深入的研究。详细阐述了飞仙关组成岩过程中发生的主要成岩作用类型及特征,建立了埋藏溶蚀作用模式和白云石化作用模式,进行了成岩环境和成岩阶段的划分,并论述了滩相和非滩相沉积物的成岩演化序列;论述了飞仙关组储层的储渗空间类型和特征、储层孔隙结构参数、储层物性特征、岩性特征,并对储层进行了分类评价;详细阐述了储层发育的控制因素,建立了储层演化模式,并对储层分布进行了预测。 研究表明,飞仙关组储层主要受沉积作用和成岩作用的控制。在它们的共同影响下,优质储层(Ⅰ+Ⅱ类)主要分布于研究区北部开江—梁平海槽西侧的铁山南—双家坝—龙门—高峰场—建南一线以及海槽东侧的铁山坡—普光—渡口河—罗家寨地区的台地边缘鲕滩中,垂向上,飞一—飞四段均有分布。

【Abstract】 Based on the principle and methods of carbonate sedimentology and reservoir diagenesis, and guided by the theories of carbonate reservoir geology, the sedimentary facies、diagenesis、reservoir characteristic、controlling factors for reservoir and distribution of reservoir of Feixianguan Formation in East Sichuan have been comprehensively studied. Multiple methods from different branches of geology and advanced analysis and test technology have been used in this research .The type and characteristics of diagenesis are described in detail, burial dissolution model and dolomitic model are established, diagenetic environment and diagenetic stage are divided. Diagenetic evolutionary series of sediments in bank and non-bank are put forward. What’s more, the type and characteristics of reservoir space, pore structure characteristics, petrophysical parameters and lithologic characteristics are comprehensively studied, according to which we classify and value the reservoir. Furthermore factors controlling the formation of reservoir are analysed and reservoir evolutionary models are established. Finally regional distribution of reservoir has been predicted.Study suggests that Feixianguan formation is essentially controlled by sedimentation and diagenesis. Under their influence, the best-quality reservoirs ( Ⅰ + Ⅱ type) are distributed in platform edge oolitic beach along Tieshannan -Shuangjiaba- Longmen- Gaofengchang- Jiannan in the west of Kaijiang-Liangping ocean and Tieshanpo- Puguang -Dukouhe-Luojiazhai districts in the east of the ocean .In vertical ,distributed in from the first section to the fourth section of Feixianguan formation.

  • 【分类号】P618.13
  • 【被引频次】4
  • 【下载频次】545
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