岩性油气藏 ›› 2015, Vol. 27 ›› Issue (6): 48–54.doi: 10.3969/j.issn.1673-8926.2015.06.007

• 油气地质 • 上一篇    下一篇

准噶尔盆地西北缘克夏断裂带胶结封闭作用研究

崔 殿   

  1. 中国石化胜利油田分公司 地质科学研究院,山东 东营 257000
  • 出版日期:2015-12-20 发布日期:2015-12-20
  • 第一作者:崔殿( 1982- ),男,博士,工程师,主要从事石油地质方面的研究工作。 地址:( 257000 )山东省东营市聊城路 2 号中国石化胜利油田分公司。 E-mail : cuidian.slyt@sinopec.com
  • 基金资助:

    国家油气重大专项“准噶尔前陆盆地油气富集规律与勘探目标优选”(编号: 2011ZX05003-005 )资助

Cemented sealing in Kexia fault zone in northwestern margin of Junggar Basin

Cui Dian   

  1.  Geology Scientific Research Institute , Sinopec Shengli Oilfield Company , Dongying 257000 , Shandong , China
  • Online:2015-12-20 Published:2015-12-20

摘要:

克夏断裂带是准噶尔盆地西北缘的一个二级构造单元,由南向北发育有克拉玛依断裂、南白碱滩断裂、百口泉断裂、百乌断裂及夏红北断裂共 5 条主要的一级断裂以及伴生的多条次级断裂。 在筛选钻遇断裂探井的基础上,通过岩心取样进行岩石薄片及扫描电镜分析,发现这 5 条一级断裂的胶结物类型明
显不同,由南向北依次为克拉玛依断裂的绿泥石和浊沸石、南白碱滩断裂的方解石、百口泉断裂的方解石和黏土矿物、百乌断裂的方解石和铁方解石以及夏红北断裂的铁白云石和菱铁矿。 由此可见,克夏断裂带成岩作用阶段由南向北逐渐趋向晚期,且经历了胶结—溶蚀—再胶结的过程。 结合断层活动性分析和断
裂带内流体包裹体均一温度测试,认为这是由于断裂活动期由南向北逐渐提前,进而影响断裂内地下流体活动期次导致的。 不同断裂的胶结封闭作用和流体活动差异性可进一步影响各断裂的油气藏分布。

关键词: 波阻抗, 地震响应特征, AVO 类型, 纵波速度, 横波速度, 模型正演, 莺歌海盆地

Abstract:

Kexia fault zone is a sublevel structural unit in northwestern margin of Junggar Basin. In the region from south to north, there are 5 major primary faults including Karamay fault, Nanbaijiantan fault, Baikouquan fault, Baiwu fault and Xiahongbei fault and many associated subsidiary faults. Based on the selected wells drilled cross fracture, combined with petrographic thin section and SEM analysis on the core sampling, it is found that the cement in the 5 primary faults are obviously different. From south to north, there are chlorite and laumontite, calcite, calcite and clay minerals, calcite and ferrocalcite, ankerite and siderite respectively in the 5 primary faults. It shows that from south to north diagenesis stage in Kexia fault zone tend to be late, which shows that Kexia fault zone experienced a process of cementation-denudationcementation. Combined with the analysis of fault activity and homogenization temperature test of fluid inclusions, it is considered that this is the result of differences of geofluid activity influenced by gradual advance of the fault activities.Cemented sealing of different faults and differences of geofluid activity can further affect the oil and gas distribution.

Key words: wave impedance , seismic response characteristics , AVO type , P-wave velocity , S-wave velocity , forward modeling , Yinggehai Basin

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