子长油田降沟-石家老庄长2油层沉积相特征及砂体展布规律  

Sedimentary Facies Characteristics and Sand Body Distribution Law of Chang2 Oil Layer of Jianggou-Shijialaozhuang in Zichang Oilfield

作　　者：段武兵 郭艳琴 何子琼[1,2] 王美霞 赵灵生 DUAN Wu-bing;GUO Yan-qin;HE Zi-qiong;WANG Mei-xia;ZHAO Ling-sheng(Xi'an Shiyou University,Xi'an 710065,China)

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]西安石油大学陕西省油气成藏地质学重点实验室,陕西西安710065

出　　处：《河北地质大学学报》2021年第2期30-33,43,共5页Journal of Hebei Geo University

基　　金：国家科技重大专项专题(2017ZX05005002-004);国家油气重大专项项目(2016ZX05046-002);国家自然科学基金重大项目(41390451,41330315);国家自然科学基金青年项目(41502107);地质矿产调查评价基金资助项目(121201011000150014);陕西省自然科学基础研究计划资助项目(2017JQ4018);西安石油大学研究生创新与实践能力培养计划资助(YCS20113028)。

摘　　要：通过野外剖面和井下岩心观察描述并结合测井资料,对子长油田降沟—石家老庄区油层组长2沉积相特征及砂体展布规律进行了系统的研究。结果表明:该区长2沉积体系为河流体系,辫状河亚相,沉积微相主要有泛滥平原及河道砂坝;长22和长21油层组砂体的展布受控于辫状河道的延伸,向南西方向展布;降沟—石家老庄区块的河道砂体发育,泛滥平原面积较小,砂体在垂向和横向上连续较好,在北东—南西方向上连续性较北西—南东向更好,研究区物源方向为北东方向。Through the observation and description of field section and downhole core and combined with logging data,the characteristics of sedimentary facies and the distribution law of sand body of Chang 2 oil layer in Jianggou-Shijialaozhuang area of Zichang oilfield are systematically studied,the results show that the Chang 2 depositional system in this area is a fluvial system with braided river subfacies,and the main sedimentary microfacies are floodplain and channel bar;The distribution of sand bodies in Chang 22 and Chang 21 oil formations is controlled by the extension of braided channel,which is distributed in the southwest direction.The channel sand body is developed in Jianggou-Shijialaozhuang block,and the flood plain area is small.The sand body is continuous in the vertical and lateral direction,and the upward continuity in the northeast to southwest is better than that in the northwest to southeast direction.The provenance direction in the study area is northeast direction.

关 键 词：鄂尔多斯盆地 长2油层组 沉积相 砂体展布规律 

分 类 号：P618.13[天文地球—矿床学]