论文部分内容阅读
通过大量岩心铸体薄片及物性等资料,对准噶尔盆地百重7区三叠系克上组主产油层储集层的岩石学特征、孔渗特征及孔隙类型等进行了深入研究,分析影响储层储集性能的主要因素,并对研究区主产储层进行分类评价。结果表明:主要勘探目的层克上组油层组砂岩储层岩石类型主要为岩屑砂岩,长石岩屑砂岩;岩石成分成熟度低;结构成熟度中等偏低;颗粒分选中等偏差;圆球度以次棱一次角为主;颗粒间接触形式以线和点一线接触为主;经历了压实、胶结、溶解等作用;孔隙类型以粒间孔、粒间溶孔、粒内溶孔为主。碎屑组成、粒级、填隙物含量和成岩作用均对储层性能有重要影响。研究区储层分为三大类,克上组油层组砂岩储层多为Ⅰ类、Ⅱ类储层。优质含油储集体多出现在分支河道发育部位。因此,加强沉积微相研究,努力寻找分支河道发育的地带成为下一步勘探的重要思路。
Based on the data of a large number of core castings and physical properties, the petrologic characteristics, pore-permeability characteristics and pore types of the reservoirs in the Kejia Formation of the Triassic in the Baizong Block 7, Junggar Basin were studied in depth. Layer reservoir performance of the main factors, and classification of the main producing reservoirs in the study area evaluation. The results show that the rock types of the sandstone reservoir in the Kexue Formation reservoir are mainly lithic sandstone and feldspathic lithic sandstone; the maturity of the rock is low; the maturity of the structure is medium and low; the median deviation of particle sorting; The degrees are mainly secondary angulations. The contact form between particles is dominated by the line and the point on the line. The compaction, cementation and dissolution are the main features of particle contact. The types of pores are intergranular, intergranular and intragranular the Lord. Detrital composition, grain size, interstitial content and diagenesis all play important roles in reservoir performance. The reservoirs in the study area are divided into three major categories. Most of the sandstone reservoirs in the Ke-Shang Formation are mainly Class I and Type II reservoirs. High-quality oil-bearing reservoirs appear in the branch of river development. Therefore, strengthening the study of sedimentary microfacies and trying hard to find the zone where the branch rivers develop are the important ideas for the next exploration.