库车坳陷阳霞地区下侏罗统阿合组储层特征及储层发育的主控因素  

Reservoir characteristics and controlling fractors of Lower Jurassic Ahe Formation in Yangxia area, Kuqa depression

作　　者：刘卫红[1,2] 高先志[1] 林畅松[3] 王鹤 叶信林[2] 冉启贵[2] 

机构地区：[1]中国石油大学(北京)地球科学学院,北京100083 [2]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [3]中国地质大学(北京)海洋学院,北京100083 [4]成都北方石油勘探开发技术有限公司,成都610000

出　　处：《地质科学》2017年第2期390-406,共17页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家重大科技专项“南大西洋两岸重要盆地层序地层格架与烃源岩和储层评价研究”（编号：2016zx05033-001-002）和国家自然科学基金重点项目“塔里木盆地古生代关键变革期的古构造古地理演变及油气聚集”（编号：41130422）资助;致谢感谢中国石油天然气集团公司中国石油咨询中心的孙平老师给予的指导;感谢河南理工大学资源环境学院吴伟老师在文章结构方面给予的建议;感谢华北油田勘探开发研究院地质实验与技术服务中心张秉顺老师在扫描电镜、x.衍射及能谱分析方面给予的大力协助.

摘　　要：通过岩心及薄片观察，结合储层物性资料、粒度分析、扫描电镜、包裹体测温、粘土矿物X-衍射分析等多种资料和手段，对阿合组储层特征进行分析，定量研究了不同成岩作用对储层物性的影响，并对储层的影响因素做了进一步的探讨。结果表明阿合组储集空间主要为杂基微孔隙，其次为长石颗粒溶孔及粒内溶孔、粒间孔及粒间溶孔；储层物性差，为典型的特低孔一超低渗型储层；岩性是储层发育的物质基础，成岩作用中的压实作用是孔隙度减小的主要因素，胶结作用次之，溶蚀作用及矿物转化对储层物性有一定的改善作用；构造幅度的差异使得所处的成岩阶段具有差异性，进而造成阳霞地区北斜坡东部储层物性优于中西部。构造背斜转折端，孔隙度有所增大的同时，渗透率也有所增大，而背斜翼部微裂缝发育，孔隙度有所增加，渗透率变化不大。指出较好储层的分布地区和构造部位及其主控因素，对该区的油气勘探具有一定的理论指导意义。By means of core and thin-sections observation, and combined with the data analysis on reservoir physical property, grain size, X-diffraction, and inclusion temperature, the reservoir characteristics are analyzed and the influence of diagenesis on the reservoir property is studied quantitatively, then the influence factors on the reservoir is further discussed. This paper shows that the reservoir space of Ahe Formation is consisted mainly of matrix micropores, andsecondary of particle dissolved pores, intragranular dissolved pores, intergranular pores and intergranular dissolved pores. It is a typical ultra-low porous and ulatra-low permeable reservoir with an average porosity of 7.9% and permeability lower than 1 × 10^-3μm2. The lithology of the reservoir is the material foundation for the development of reservoir. The compaction is the main reason accounting for the reduction of porosity, and then the cementation. The dissolution and mineral conversion can improve the reservoir physical property to some extent, and different relief of structures can cause the variance of diagenetic stage, thus, the physical property in the east is better than that in the mid-west of the northern slope in Yangxia district. In the anticline juncture, the porosity and permeability are both increased. While in the anticlinal flank where micro- fractures are developed, though the porosity is increased, the permeability doesn＇t change much. The study on distribution of favorable reservoir, its tectonic position and controlling factors are of great theoretical significance to the oil and gas exploration in this area.

关 键 词：储层特征 成岩作用 定量分析 库车坳陷 

分 类 号：P618.13[天文地球—矿床学]