鄂尔多斯盆地东南缘延长组露头剖面砂岩组分特征及石油地质意义  

Sandstone component characteristics and its petroleum geological significance of profiles of Yanchang Formation outcrops in southeastern margin of Ordos Basin

作　　者：贺静[1,2] 袁效奇[1,2] 冯胜斌[1,2] 解古巍[1,2] 韩鹏[1,2] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院 [2]低渗透油气田勘探开发国家工程实验室

出　　处：《低渗透油气田》2014年第2期1-5,18,共6页

基　　金：中国石油长庆油田分公司“鄂尔多斯盆地东南缘剖面图集”项目资助（2012-41）;2.中国石油天然气股份有限公司“鄂尔多斯盆地致密油勘探开发关键技术研究”重大科技专项（2011E-2602）项目资助.

摘　　要：通过对鄂尔多斯盆地东南缘延长组露头剖面系统采样和测定，系统总结了主要油层组砂岩岩矿组分特征。各剖面、主要油层组砂岩组分特征精细对比研究表明，盆地东南部延长组沉积受东北、东南和西部物源体系控制；不同物源体系沉积范围在不同沉积期为一动态变化特征，长8、长6沉积期东北物源体系延伸较远．以铜川金锁关为界。以北为东北物源主控沉积区，以南为东南和西部物源主控沉积区；长7沉积期东南、西部物源沉积体系向北延伸至铜川汤泥河一带，东北物源体系退至黄龙以北地区。地质露头剖面系统的岩矿分析资料补充了研究区基础资料．物源体系的新认识，为研究区沉积体系展布、含油砂体分布规律预测深入研究以及落实和扩大勘探成果提供了地质依据。Through sampling and measurement of the Yanchang Formation outcrops of southeastern margin of Ordos Basin, the characteristics of rock and mitleral tomliollents of sandstoue of the main reservoir group are systematically summarized in the paper. It indicates hy finely comparative study of salldslne component charaeteristies of the main reservnir group and each profile that the Yanehang Formation sedimentation in the southeast basin is subject to the control uf not-lheash sontheast and weslern provenan（e systems. The deposition range of different provenances has eharaeteristies of dynamic change in difl＇erent sedimentary stages. The northeas! provenance exlends farther in Chang 8 and Chang6 sedimentary stages. Regarding the Jinsuo Pass （Jinsuoguan） in Tongt：huan, Shaanxi, as a tioundau, to the noflh is the northeast-provenance-controlled deposition area, and to lhe south is tile Ileposition area mainly controlled by the southeast and western provenance. In the Chang7 depositional stage, the depositional systems of south- east and west provenance extends north to the Tangnihe area in the city of Tungchuan; the northeaslern source area retreated to the north of Huang- long County. Rock＇s mineralogical analysis data of the geological outcrop systems complement Ihe basic data of the study area. In addition, new underslandiug of the prow＇nanee provides geolngieal basis for the in-depth study of sedimentary system distribution in the study area, prediction of the distrihntion law of oil sands, and the implementation and expansion of exploration resuhs.

关 键 词：鄂尔多斯盆地东南缘 延长组 物源体系 露头剖面 砂岩组分 

分 类 号：P618.130.2[天文地球—矿床学]