碎屑岩成岩作用及其对储层的影响——以鄂尔多斯盆地镇泾地区为例

发布时间：2018-03-16 20:01

本文选题：成岩作用　切入点：成岩序列　出处：《石油实验地质》2017年03期 　论文类型：期刊论文

【摘要】：基于岩心观察、铸体薄片、扫描电镜、阴极发光等测试,对鄂尔多斯盆地镇泾地区延长组储层开展了成岩作用类型、成岩序列等研究。结果表明:(1)溶蚀孔的形成不仅有长石溶蚀的贡献,而且还有长石蚀变形成沸石的二次溶蚀贡献;微裂缝的形成是石英在强烈压实作用下导致的硅质微碎裂;晶间孔和粒间孔的形成与成岩早期形成的白云石抑制压实作用的进行密切相关;(2)早期形成的绿泥石膜,因成岩环境的改变,脱出大量的铁和镁离子,并在水解溶蚀作用下与絮凝胶体形成叶片状绿泥石,封堵孔隙;(3)镇泾地区成岩序列演化特征揭示,早期碳酸盐胶结物自形程度比较高;绿泥石膜是成岩初期的产物,第二期绿泥石多呈叶片状产出;早期浊沸石交代斜长石,在后期的溶蚀改造为储层提供了较好的储集空间;长石溶蚀形成书页状高岭石。
[Abstract]:Based on core observation, thin casting, scanning electron microscope and cathodoluminescence measurements, diagenetic types of reservoirs in Yanchang formation in Zhenjing area, Ordos Basin, have been developed. The results show that the formation of dissolution pore is not only contributed by feldspar dissolution, but also by secondary dissolution of feldspar and deformed zeolite, and the formation of microfracture is caused by silica microfragmentation due to strong compaction. The formation of intergranular and intergranular pores is closely related to the inhibition of compaction by dolomite formed in the early diagenetic stage. (2) the chlorite film formed in the early stage of diagenesis has produced a large amount of iron and magnesium ions due to the change of diagenetic environment. The diagenetic sequence evolution characteristics in Zhenjing area under hydrolysis and dissolution and flocculation colloid formation of foliar chlorite reveal that the early carbonate cementation is relatively high, and the chlorite film is the product of early diagenesis, and the formation of chlorite film is the result of early diagenesis, and the characteristics of diagenetic sequence evolution in Zhenjing area indicate that the early carbonate cementation is relatively high. In the second stage, the chlorite occurs mostly in the form of leaves; the early clinopalite is metasomorphic, which provides a better reservoir space for the reservoir in the late stage of dissolution; and the feldspar dissolves to form a sheet kaolinite.
【作者单位】：中国石化华东油气分公司勘探开发研究院;中国石化华东油气分公司石油工程技术研究院;中国石油大学(华东)非常规油气与新能源研究院;中国石油勘探开发研究院;
【基金】：国家自然科学基金(41672125,41472105) 国家油气重大专项(2011ZX05035,2016ZX05029002)资助
【分类号】：P618.13

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