东濮凹陷杜寨地区深层砂岩储层致密化与油气充注关系

发布时间：2018-04-14 04:17

本文选题：深层致密砂岩 + 孔隙度演化　；参考：《东北石油大学学报》2016年03期

【摘要】：为分析东濮凹陷杜寨地区沙三中—下亚段致密砂岩储层演化与油气充注过程的耦合关系,综合运用铸体薄片、阴极发光、扫描电镜、荧光显微及流体包裹体等测试方法,明确杜寨地区沙三中—下亚段储层特征、成岩作用、成岩演化序列、储层孔隙度演化史和油气充注史等。结果表明:杜寨地区沙三中—下亚段处于中成岩B期至晚成岩阶段,在经历三期钙质胶结、三期溶蚀、持续压实的复杂成岩过程后,在斜坡带发育低孔低渗砂岩储层,在洼陷带发育特低孔特低渗致密砂岩储层。东营组沉积末期,储层尚未致密化,低熟—成熟有机质在斜坡带聚集形成常规型油气藏,在洼陷带附近形成"边致密边成藏"型致密砂岩油气藏。明化镇组沉积末期至今,储层致密,除少量油气向上运移、在斜坡带形成"边致密边成藏"型油气藏外,仍有大量晚期生成的天然气在洼陷带附近聚集,形成典型的"先致密后成藏"型致密砂岩气藏。
[Abstract]:In order to analyze the coupling relationship between the evolution of tight sandstone reservoir and the process of oil and gas filling in the middle and lower member of Sha 3 in Duzhai area, Dongpu depression, the methods of measuring thin cast sheet, cathode luminescence, scanning electron microscope, fluorescence microscopy and fluid inclusion are used synthetically.The reservoir characteristics diagenesis diagenesis diagenetic evolution history of reservoir porosity and oil and gas charging history of middle and lower member of Sha 3 in Duzhai area are clarified.The results show that the middle and lower member of Sha3 in Duzhai area is in the stage of middle diagenesis B to late diagenesis. After the complex diagenesis of calcareous cementation, third phase dissolution and continuous compaction, low porosity and low permeability sandstone reservoirs are developed in the slope zone.The extremely low porosity and low permeability tight sandstone reservoirs are developed in the sag zone.In the late sedimentary period of Dongying formation, the reservoir has not been densified. The low mature organic matter accumulates in the slope zone to form a conventional reservoir, and a tight sandstone reservoir is formed near the sag zone.Since the end of the Minghuazhen formation, the reservoir is dense, except for a small amount of oil and gas migration upward, and the formation of a "edge tight side reservoir" type oil and gas reservoir in the slope zone, there is still a large amount of late generated natural gas accumulation near the sag zone.A typical tight sandstone gas reservoir is formed.
【作者单位】：中国石油大学(华东)地球科学与技术学院;中国石化中原油田分公司勘探开发研究院;
【基金】：国家科技重大专项(2011ZX05006-004)
【分类号】：P618.13

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