安塞油田楼坪区长10砂岩储层成岩作用及孔隙演化  

Diagenesis and Pore Evolution in Sandstone Reservoir of the Chang-10 Interval in Louping area of Ansai Oilfield

作　　者：林利飞[1] 白玉彬[2] 李军[2] 朱黎丽 

机构地区：[1]延长油田股份有限公司,陕西延安716000 [2]西安石油大学,陕西西安710065 [3]延长油气勘探公司石油勘探开发部,陕西延安716000

出　　处：《延安大学学报（自然科学版）》2016年第3期72-76,共5页Journal of Yan'an University：Natural Science Edition

摘　　要：根据岩石薄片、铸体薄片、扫描电镜等资料研究了安塞油田楼坪区长10砂岩储层岩石类型、成岩作用及孔隙演化特征。结果表明,长10砂岩岩石类型主要为长石砂岩和岩屑长石砂岩,填隙物总量可达14%,且主要以浊沸石、碳酸盐矿物和粘土矿物为主。储集空间类型以残余粒间孔和各类溶蚀孔隙为主。研究区长10砂岩储层经历的成岩作用类型主要包括压实作用、胶结作用以及溶蚀作用等。其中,具破坏性的成岩作用主要包括压实作用和胶结作用,而具建设性的成岩作用主要为溶蚀作用。成岩作用对孔隙度影响的定量计算结果表明,压实作用与胶结作用造成的孔隙度损失分别为14.11%和13.76%,而溶解作用造成的孔隙度增加量约为3.65%,孔隙演化趋势整体表现为孔隙度先急剧减小后缓慢增加。The rock types,diagenesis and pore evolution characteristics of Chang-10 sandstone reservoir in Ansai oilfield are studied based on the data of rock thin section,cast thin section,scanning electron microscope and so on.The results showed that the main rock types of the Chang 10 sandstone are feldspar sandstone and debris- feldspar sandstone,the total amount of the interstitial materials which mainly conclude laumontite,carbonate minerals and clay minerals can reach 14%. Residual intergranular pores and various dissolution pores are the main reservoir space. The Chang 10 sandstone mainly experienced compaction,cementation and dissolution,and the compaction and cementation are the unfavorable diagenesis for reducing the porosity of reservoir while the dissolution is favorable diagenesis for increasing the porosity. The calculation results of increase and loss of pore of diagenesis showed that the loss of porosity of compaction and cementation is 14. 11% and 13. 76%,respectively,while the increase of porosity of dissolution is about 3. 65%. The whole trend of pore evolution shown as rapid decrease of porosity in early time and slow increase of porosity latterly.

关 键 词：鄂尔多斯盆地 安塞油田 长10油层组 成岩作用 孔隙演化 

分 类 号：TE122.1[石油与天然气工程—油气勘探]