近源湖盆砂砾岩储层次生溶孔成因探讨——以查干凹陷祥6井区为例

发布时间：2018-05-30 15:30

本文选题：查干凹陷 + 成岩作用　；参考：《吉林大学学报(地球科学版)》2017年02期

【摘要】：查干凹陷祥6井区砂砾岩储层发育蜂窝状次生溶蚀孔隙。通过对岩石薄片、阴极发光薄片及扫描电镜分析,结果表明,该孔隙主要由钙长石颗粒及碳酸盐胶结物溶蚀形成,少量长英质岩屑及石英颗粒边缘也有溶蚀迹象。荧光薄片及包裹体测温证实存在两期胶结作用,结合研究区热演化史研究结果,成岩演化规律与该湖盆主要发育的两期生烃历史、两期构造抬升剥蚀相对应。主要的成岩演化序列:压实作用为主(初次深埋)→长石颗粒大量溶蚀,少量石英次生加大,局部成藏(初次生烃)→第一期胶结(第一期构造抬升剥蚀)→第一期胶结物溶蚀,蜂窝状次生溶孔发育,局部成藏(再次深埋,二次生烃)→第二期胶结物胶结,少量石英质颗粒溶蚀(第二期构造抬升剥蚀)。
[Abstract]:The sand gravel reservoir in Xiang6 well area of Chagan sag developed honeycomb secondary dissolution pores. The results show that the pore is mainly formed by dissolution of calcium feldspar and carbonate cementation, and a few feldspar and quartz particles are also showing signs of dissolution at the edge of a small amount of feldspar and quartz particles. According to the results of the study on the thermal evolution history of the study area, the diagenetic evolution law corresponds to the two periods of hydrocarbon generation history and tectonic uplift and denudation of the lake basin. The main diagenetic evolution sequence: compaction mainly (initial deep burying) feldspar grain dissolution, a small amount of quartz secondary increase, Local reservoir formation (primary hydrocarbon generation) / first stage cementation (first stage tectonic uplift and denudation) / first stage cement dissolution, honeycomb secondary dissolution pore development, local reservoir formation (re-buried, secondary hydrocarbon generation) and second stage cementation, A small amount of quartz grain dissolution (second stage tectonic uplift denudation).
【作者单位】：中石化胜利油田分公司勘探开发研究院;中石化胜利油田分公司博士后科研工作站;河南理工大学安全科学与工程学院;中国石油冀东油田分公司;中石化中原油田勘探开发科学研究院;
【基金】：国家科技重大专项(2011ZX05006-004,2011ZX05040-005)~~
【分类号】：P618.13

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