孙远实,赵振宇,郭彦如,张延玲,王玥
SUN Yuanshi,ZHAO Zhenyu,GUO Yanru,ZHANG Yanling,WANG Yue

• 1:中国石油勘探开发研究院

摘要(Abstract)：

近年来,鄂尔多斯盆地西缘是油气增储上产的潜力区,但较低的研究程度对下步油气勘探造成障碍。在沉积演化环境分析的基础上,对重点层段储层特征进行了描述,在横向及纵向上划分出了物性较好的储集体。研究表明:下古生界的奥陶系主要发育台地边缘相的礁滩、潮坪相的砂屑白云岩沉积,储层非均质性强,局部发育薄层高渗储层;上古生界的石炭-二叠系主要发育滨海-三角洲相碎屑沉积,具规模成藏潜力;中生界主要发育河流-三角洲相的碎屑沉积,以长石砂岩和岩屑长石砂岩为主,部分层段发育较好储集体,属中-低孔、低渗储层。总的来说,鄂尔多斯盆地西缘存在较优质储层,可进行更深入的有利区带评价及勘探部署。
In recent years,West Margin of Ordos Basin has developed into the potential area of petroleum reserves and production enhancement,but the rather lower research degree has resulted in the obstacle of the further petroleum exploration.Based on the analysis of the sedimentary and evolution environments,the descriptions of the reservoir characteristics for the important intervals are presented,and moreover the much better reservoirs and bodies are optimized in horizontal and vertical directions.The studies show that the platform-margin-phase reef flat,tidal-flatphase sandy dolomite sedimentation are mainly developed in Ordovician Pzl,the heterogeneity of the reservoirs is rather strong,the thin and high-permeability layers are partially well developed;the paralic and delta depositions are principally developed in Pz2 C-P(Carboniferous-Permian system) with a certain scale of petroleum reservoir accumulation potential;the fluvial and delta clastic depositions are generally well developed in Mz(MesOzpic),which present the priority to arkosic and debris-arkosic sandstones,additionally,the much better reservoirs and bodies with middle-low porosity and low permeability are developed in the part of the intervals.

关键词(KeyWords)： 鄂尔多斯;盆地西缘;沉积相;储层;有利相带
Ordos Basin;Basin West Margin;sedimentary facies;reservoir;favorable facies belt

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“大型油气田及煤层气开发”(2011ZX05)

作者(Author): 孙远实,赵振宇,郭彦如,张延玲,王玥
SUN Yuanshi,ZHAO Zhenyu,GUO Yanru,ZHANG Yanling,WANG Yue

参考文献(References)：

• [1]白云来,王新民,刘化清,等.鄂尔多斯盆地西缘构造演化及与相邻盆地关系[M].北京,地质出版社,2010.
• [2]赵振宇,郭彦如,王艳,等.鄂尔多斯盆地构造演化及古地理特征研究进展[J].特种油气藏,2012,19(5):15-20.
• [3]朱筱敏,康安,王贵文,等.鄂尔多斯盆地西南部上古生界层序地层和沉积体系特征[J].石油实验地质,2002,24(4):327-333.
• [4]宋土顺,陶学双,刘立,等.鄂尔多斯盆地西缘马家滩地区石盒子组砂岩的岩石学、地球化学与成岩作用特征[J].世界地质,2012(4):648-655.
• [5]侯宇,李斌.鄂尔多斯盆地西缘前陆盆地中生界成岩作用研究[J].东华理工学院学报,2007,30(1):1-8.
• [6]师清高,龚建涛,秦志成,等.延长油田三叠系长8,长6油层组沉积特征及储集性能[J].大庆石油地质与开发,2015,34(1):36-41.
• [7]税晓萍.鄂尔多斯盆地西缘及邻区侏罗纪延安期沉积体系及其特征研究[J].科技信息,2011(25):33.
• [8]郭彦如,付金华,魏新善,等.鄂尔多斯盆地奥陶系碳酸盐岩成藏特征与模式[J].石油勘探与开发,2014,39(4):393-403.
• [9]向雷.鄂尔多斯盆地西缘下古生界储层特征研究[D].成都,成都理工大学,2009.
• [10]杨希濮,孙卫.鄂尔多斯盆地低渗透油藏孔隙结构特征及影响因素分析[J].特种油气藏,2011,18(6):44-47.
• [11]郭馨蔚,师永民,杨悦,等.鄂尔多斯盆地长6油层组致密储层影响因素分析[J].大庆石油地质与开发,2013,32(5):165-169.
• [12]丁晓琪,张哨楠.鄂尔多斯盆地西南缘中生界成岩作用及其对储层物性的影响[J].油气地质与采收率,2011,18(1):18-22.