下二门油田储层成岩作用类型及微观孔隙结构特征  

The Diagenesis Type and the Pore Structure Feature in Xiaermen Oilfields

作　　者：谢俊[1,2] 孟宁宁[2] 张金亮[3] 姜建伟[4] 曾俊[4] 

机构地区：[1]山东省沉积成矿作用与沉积矿产重点实验室,山东青岛266510 [2]山东科技大学地质学院,山东青岛266510 [3]北京师范大学资源学院,北京100875 [4]中国石化河南油田分公司勘探开发研究院,河南南阳473132

出　　处：《中国海洋大学学报（自然科学版）》2012年第1期122-126,共5页Periodical of Ocean University of China

基　　金：国家自然科学基金面上项目(41172109);山东省自然科学基金面上项目(ZR2011DM009);山东科技大学科研创新团队计划(2010KYTD103)资助

摘　　要：通过14口取心井普通薄片、铸体薄片的镜下观察及扫描电镜等资料的研究,认为影响下二门油田碎屑岩储层的成岩作用主要有3种:压实、胶结和溶蚀。其中,压实作用以机械压实为主,化学压实少见;胶结作用主要有碳酸盐胶结(如方解石、白云石等)、黏土矿物胶结(如高岭石、绿泥石等);溶蚀作用主要有长石颗粒和少部分岩屑溶蚀、碳酸盐胶结物溶蚀。这3种成岩作用的共同改造形成了下二门油田以粒间孔、粒内溶孔和铸模孔为主的孔隙结构特征。根据微观孔隙结构特征,结合沉积相展布特点,认为下二门油田有利储层主要分布在辫状三角洲前缘亚相带水下分流河道和前缘砂坝等砂体。这些新认识为该油田调整挖潜提供了地质指导。By means of the datums,such as ordinary thin slice and cast thin slice of the core hole and the data of scanning electronic microscope,the main diagenesis affecting the clastic rock reservoir in Xiaermen oilfield are compaction,cementation and denudation.The machine compact is widespread and the chemistry compact is rare for the compaction.The cementation are mainly carbonate cement（including the cementation of calcite and dolomite and ferroan calcite and ferroan dolomite） and clay mineral cement as kaolinite and chlorite.The denudation are mainly feldspar grains,a little of detritus corrode and carbonate cement corrode.The common reformation of the three diagenesis formed the pore structure feature which extensively distribute intergranular pore,innergranular pore and lingot pore in Xiaermen oilfield.According to the micro-pore structure characteristics,the authors combined with the distribution of sedimentary facies believe that,the favorable reservoir of Xiaermen oilfield developes in the underwater distributary channel and foredelta sand bar of braided delta front sub-facies.These new understandings provide a geological guide for adjustment and tapping potential of the oilfield.

关 键 词：下二门油田 成岩作用 孔隙结构 储层特征 

分 类 号：TE122.23[石油与天然气工程—油气勘探]