松辽盆地南部德惠断陷下白垩统营城组碎屑岩储层成岩作用及成岩相

发布时间：2018-02-24 23:04

本文关键词： 成岩作用成岩相储层物性德惠断陷下白垩统营城组松辽盆地　出处：《东北石油大学学报》2017年03期 　论文类型：期刊论文

【摘要】：松辽盆地德惠断陷下白垩统营城组地层埋藏深度较大、成岩作用与非均质性强,致密化程度高,勘探风险大。采用普通薄片、铸体薄片、扫描电镜、X线衍射等测试分析方法,分析碎屑岩储层的岩石学特征、物性和成岩作用,根据影响储层物性的主控成岩作用类型和物性特征,结合沉积相(微相)划分成岩相。结果表明:德惠断陷营城组碎屑岩储层主要经历机械压实作用,硅质、碳酸盐(方解石)、黏土矿物和浊沸石胶结作用,以及长石和岩屑溶蚀作用。营城组碎屑岩储层成岩相划分为3种类型:压实致密相、碳酸盐胶结相、不稳定矿物溶蚀相。其中不稳定矿物溶蚀相含气性最好,广泛分布在水下分支河道和水上分支河道微相砂体中,属于建设性成岩相。压实致密相和碳酸盐胶结相导致储层致密,属于不利于储层发育的成岩相。研究结果可为研究区储层分类和评价提供依据。
[Abstract]:The Lower Cretaceous Yingcheng formation in the Dehui fault depression of Songliao Basin is characterized by its deep burial depth, strong diagenesis and heterogeneity, high degree of densification and great exploration risk. The petrological characteristics, physical properties and diagenesis of clastic reservoir are analyzed. Combined with sedimentary facies (microfacies), the diagenetic facies are divided into diagenetic facies. The results show that the clastic rock reservoirs of Yingcheng formation in Dehui fault depression are mainly subjected to mechanical compaction, siliceous, carbonate (calcite), clay and zeolite cementation. And feldspar and lithic dissolution. The diagenetic facies of Yingcheng formation clastic reservoir are divided into three types: compaction dense facies, carbonate cementation facies, unstable mineral dissolution facies. It is widely distributed in microfacies sand bodies of subaqueous branched channel and branch channel on water, which belongs to constructive diagenetic facies. Compaction dense facies and carbonate cementation facies lead to reservoir compaction. The results can provide basis for reservoir classification and evaluation.
【作者单位】：中国石油大学(北京)油气资源与探测国家重点实验室;中国石油大学(北京)盆地与油藏研究中心;中国石油吉林油田分公司勘探开发研究院;
【基金】：中国石油吉林油田分公司项目(JS2016-W-13-JZ-9-18)
【分类号】：P618.13

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