鄂尔多斯盆地环庆地区长8岩石学特征  

Petrological characteristics of Chang 8 in Huanqing area,Ordos Basin

作　　者：李少勇 俞海东 李宗霖 李丛林 纪惠爱 Li Shaoyong;Yu Haidong;Li Zonglin;LiConglin;Ji Huiai(Research Institute of Exploration and Development,Yumen Oilfield Company,CNPC,Gansu Jiuquan 735019)

机构地区：[1]中国石油集团玉门油田分公司勘探开发研究院,甘肃酒泉735019

出　　处：《石化技术》2022年第10期138-141,共4页Petrochemical Industry Technology

摘　　要：利用目的层取芯井段储层岩心、岩石薄片、铸体薄片、扫描电镜、X衍射试验分析数据,结合前人研究成果,对鄂尔多斯盆地环江地区不同方向长8岩石学特征进行研究,岩石类型以岩屑长石砂岩和长石岩屑砂岩为主;石英、长石含量较高,岩屑、填隙物含量较低,其成分成熟度较低;岩屑以变质岩屑为主,塑性岩屑含量较高(喷发岩),半刚性岩屑和刚性含量之和与塑性岩屑含量比值为51.84%,分选性中-好,颗粒以次棱角为主,结构成熟度较高;单个砂层组及东西向岩石学特征有所差别,物源和沉积环境的差异是该区岩石学特征的重要影响因素。Based on the data of reservoir cores,rock thin sections,cast thin sections,scanning electron microscopy and X-ray diffraction tests in the target core-well section,combined with previous research results,the petrological characteristics of Chang 8 in different directions in the Huanjiang area of Ordos Basin were studied.The rock types are mainly lithic feldspar sandstone and feldspar lithic sandstone.The content of quartz and feldspar is higher,while the content of debris and intercalation is lower,and the composition maturity is lower.The cuttings are mainly metamorphic cuttings with high plastic cuttings content(eruptive rock).The ratio of the sum of semi-rigid cuttings and rigid cuttings to plastic cuttings content is 51.84%.The sorting property is medium-good,the particles are mainly secondary edges and angles,and the structure maturity is high.The petrological characteristics of single sand group and east-west direction are different,and the difference of provenance and sedimentary environment is an important factor affecting the petrological characteristics of this area.

关 键 词：长8储层 岩石学特征 东西向 鄂尔多斯盆地 

分 类 号：P618.13[天文地球—矿床学]