准噶尔盆地中央坳陷莫索湾地区侏罗系三工河组深层致密砂岩气储集层特征及成因

发布时间：2018-04-19 21:37

本文选题：准噶尔盆地 + 莫索湾地区　；参考：《古地理学报》2017年05期

【摘要】：综合利用岩心、薄片、扫描电镜以及测井资料,对准噶尔盆地中央坳陷莫索湾地区侏罗系三工河组一段致密砂岩气储集层特征及致密化成因进行研究。结果表明:(1)三工河组一段储集层平均埋深超过4500m,具低—特低孔、低—特低渗特征,属于典型深层致密砂岩气储集层;(2)沉积类型为浅水三角洲—湖泊相沉积,三角洲前缘水下分流河道砂岩为主要储集层;(3)岩石类型以细砂岩、粉—细砂岩为主,主要为低成分成熟度的岩屑砂岩,具有岩屑和塑性岩屑含量高及胶结物含量低的"两高一低"特征;(4)储集层孔隙类型以混合孔为主,孔隙-孔喉组合类型以中细孔-细喉型为主,孔喉分选性、连通性和渗流能力相对较差,微观孔隙结构总体较差;物质成分、压实作用及胶结物充填是3个导致储集层致密化的因素,从而形成三工河组一段深层致密砂岩气储集层。
[Abstract]:Based on core, thin slice, scanning electron microscope and logging data, the characteristics and densification factors of tight sandstone gas reservoir in the first member of Jurassic Sangonghe formation in Mosuowan area, central depression of Junggar Basin are studied. The results show that the average buried depth of the first member of the first member of the Sangonghe formation is more than 4500m, which has the characteristics of low to very low porosity and low to very low permeability. The reservoir belongs to the typical deep and dense sandstone gas reservoir and belongs to the shallow water delta-lacustrine facies sedimentary type. The subaqueous distributary channel sandstones in the delta front are mainly composed of fine sandstone, siltstone and fine sandstone, which are mainly lithic sandstone with low compositional maturity. The characteristics of "two high and one low" with high content of cuttings and plastic cuttings and low content of cementation are characterized by "two high and one low". The pore type of reservoir is mainly mixed pore, the type of combination of pore and pore throat is mainly of medium fine pore and fine throat, and the separation of pore throat is the main type. The connectivity and percolation ability are relatively poor, the microscopic pore structure is relatively poor, and the material composition, compaction and cementation are the three factors leading to the densification of the reservoir, thus forming the deep and compact sandstone gas reservoir of the first member of the Sangonghe formation.
【作者单位】：中国石油新疆油田分公司勘探开发研究院;
【基金】：国家重点基础研究发展计划(973计划)项目(编号:2014CB239001) 国家科技重大专项(编号:2016ZX05047-001)联合资助~~
【分类号】：P618.13

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