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川西龙门山前雷口坡组四段白云岩储层胶结物对早期孔隙的影响

王琼仙 宋晓波 陈洪德 刘昊年

王琼仙, 宋晓波, 陈洪德, 刘昊年. 川西龙门山前雷口坡组四段白云岩储层胶结物对早期孔隙的影响[J]. 石油实验地质, 2018, 40(6): 757-763. doi: 10.11781/sysydz201806757
引用本文: 王琼仙, 宋晓波, 陈洪德, 刘昊年. 川西龙门山前雷口坡组四段白云岩储层胶结物对早期孔隙的影响[J]. 石油实验地质, 2018, 40(6): 757-763. doi: 10.11781/sysydz201806757
WANG Qiongxian, SONG Xiaobo, CHEN Hongde, LIU Haonian. Cement characteristics and effects on dolomite reservoir pores in the fourth member of Leikoupo Formation, Longmen Mountain front, western Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(6): 757-763. doi: 10.11781/sysydz201806757
Citation: WANG Qiongxian, SONG Xiaobo, CHEN Hongde, LIU Haonian. Cement characteristics and effects on dolomite reservoir pores in the fourth member of Leikoupo Formation, Longmen Mountain front, western Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(6): 757-763. doi: 10.11781/sysydz201806757

川西龙门山前雷口坡组四段白云岩储层胶结物对早期孔隙的影响

doi: 10.11781/sysydz201806757
基金项目: 

中国石化十条龙重大科技攻关项目“龙门山前雷口坡组勘探开发关键技术”(P16092)资助。

详细信息
    作者简介:

    王琼仙(1984-),女,硕士研究生,高级工程师,从事储层地质和成岩作用研究。E-mail:wqxtop@163.com。

  • 中图分类号: TE122.2

Cement characteristics and effects on dolomite reservoir pores in the fourth member of Leikoupo Formation, Longmen Mountain front, western Sichuan Basin

  • 摘要: 利用薄片、阴极发光、探针微量元素、激光碳氧同位素及包裹体测温等资料,在龙门山前中三叠统雷口坡组四段上亚段白云岩储层中主要识别出3期5种胶结物,在对不同期次和不同种类胶结物特征及分布特征研究的基础上,结合胶结物的发育程度,还原了胶结物对龙门山前雷四上亚段不同类型白云岩储层孔隙演化的影响过程。研究认为:第一期浅埋藏白云石胶结物形成是藻类白云岩储层孔隙破坏的主要阶段,但这期胶结物产生后对残余孔隙起支撑作用,有利于大量早期孔隙保存;在第一期胶结物充填基础上叠加第二期表生期渗流砂充填,破坏部分藻类白云岩早期残余孔隙;第三期再埋藏含铁嵌晶方解石胶结是晶粒白云岩储层孔隙破坏的主要原因,在藻类白云岩储层中,该期胶结物不均匀分布进一步加剧了储层非均质性,但这期胶结物的产生受到烃类和油气充注的抑制,因此早期残余孔隙在漫长的再埋藏阶段得到较好保存。

     

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  • 收稿日期:  2018-08-20
  • 修回日期:  2018-10-29
  • 刊出日期:  2018-11-28

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