摘要
何家集地区长4+5和长6为三角洲平原沉积,呈北东-南西向条带状展布的分流河道骨架砂体是主要储集体。储层岩石类型主要为长石中-细砂岩,碎屑组分平均含量长石60.8%,石英22.0%,岩屑17.2%,胶结物主要为硅质、长石质和绿泥石膜,其次含水云母和铁方解石。储层孔隙类型以残余原生粒间孔为主,其次是长石溶孔和岩屑溶孔等,研究区大孔-细喉型和中孔-微细喉型最为发育,成为油气储集的主要空间。含油层段为物性较好的中-细砂岩,通常孔隙度大于10%,渗透率大于0.5×10-3μm2,为油水同层或含油水层,录井油气显示为油斑或油迹。电测曲线表现为自然电位负异常,自然伽玛低值,声波时差中-高值,电阻率为中值。
The Chang 4 ＋ 5 and Chang 6 in He Jiaji area are delta plain deposits, and their main reservoirs are dis- tributary channel sand bodies, which had a banding distribution along the northeast - southwest direction. The types of the reservoir rock are mainly medium - fine arkose, and the average content of detrital component is 60.8% feld- ea is large pore with fine throat and middle pore with micro throat, which become the main storage space. The oil bearing formation is medium - fine sandstone with good physical properties. Its porosity generally is greater than 10% and the permeability is greater than 0.5×10^-3μm^2 The oil bearing formation is oil - water layers or oily wa- ter and the shows of oil and gas in logging are oil stain or oil trail. The well log shows self - potential negative anom- aly, low gamma ray, mediumhigh acoustic travel time and median resistivity.
出处
《延安大学学报（自然科学版）》
2013年第4期73-76,共4页
Journal of Yan'an University：Natural Science Edition
基金
国家科技重大专项专题(2011ZX05005-004-008HZ)
陕西省教育厅自然科学专项科研计划项目(11JK0746)联合资助
关键词
储层四性关系
非均质性
延长组
何家集地区
鄂尔多斯盆地
reservoir four properties relationship
heterogeneity
Yanchang formation
Hejiaji area
Ordos basin
