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本文通过对鄂尔多斯盆地杭锦旗地区锦6~锦11六口井的746块岩芯进行分析表明,杭锦旗地区下石盒子组储层岩石类型主要为岩屑石英砂岩和长石石英砂岩,山西组主要为岩屑石英砂岩、长石岩屑砂岩,太原组主要为岩屑砂岩和石英砂岩,储层岩石成熟度中等;经历压实作用、胶代作用、溶蚀作用和构造作用等。储层物性差,总体具有低孔低渗特征,剖面上,山西组的储层物性最好,盒一段物性较好,盒二、三段以及太原组的物性较差;平面上,锦11井区的孔隙度最好,平均为10.51%,锦10井区的渗透率最高,平均为6.47×1-0 3μm2,综合孔隙度和渗透率,锦9井区的储层物性最好,锦7井区的储层物性最差。影响储层物性的因素有很多,其中成岩作用对储层发育起着决定性的作用。
Based on the analysis of 746 cores in Jin 6 ~ Jin 11 six wells in Hangjinqi area, Ordos Basin, it shows that the rock types of Lower Shihezi Formation in Hangjinqi area are mainly lithic quartz sandstone and feldspar quartz sandstone, Mainly lithic quartz sandstone and feldspar lithic sandstone. The Taiyuan Formation is mainly composed of lithic sandstone and quartz sandstone. The rock quality of the reservoir is medium in maturity. Compaction, gel-forming, dissolution and tectonism are experienced. The physical properties of the reservoir are poor and generally have the characteristics of low porosity and low permeability. In the section, the physical properties of the reservoir in Shanxi Formation are the best, the physical properties of the first section of box are better, the physical properties of the second and third sections of box and Taiyuan Formation are poor; The porosity of the area is the best, with an average of 10.51%. The permeability of Jin 10 well is the highest, with an average of 6.47 × 1-0 3μm2. Comprehensive porosity and permeability show the best reservoir properties in Jin 9 well, The well area has the worst reservoir properties. There are many factors affecting reservoir physical properties, of which diagenesis plays a decisive role in reservoir development.