西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

鄂尔多斯西南山2 盒8 沉积体系与天然气勘探

郭小军1 *,陈世悦2,王联国1,李德胜3,刘浪3   

  1. 1. 中国石油长庆油田分公司第十一采油厂,甘肃庆阳745000
    2. 中国石油大学(华东)地球科学与技术学院,山东青岛266580
    3. 中国石油长庆油田分公司第二采油厂,甘肃庆城745100
  • 出版日期:2015-10-01 发布日期:2015-10-01
  • 通讯作者: 郭小军,E-mail:elongtv@126.com

Depositional System and Gas Potential of Shanxi Formation and Member 8#br# of Xiashihezi Formation in Southwest Ordos Basin

Guo Xiaojun1*, Chen Shiyue2, Wang Lianguo1, Li Desheng3, Liu Lang3   

  1. 1. The Eleventh Oil Production Plant,Changqing Oilfield Company,PetroChina,Qingyang,Gansu 745000,China
    2. School of Geosciences,China University of Petroleum,Qingdao,Shandong 266580,China
    3. The Second Oil Production Plant,Changqing Oilfield Company,PetroChina,Qingcheng,Gansu 745100,China
  • Online:2015-10-01 Published:2015-10-01

摘要:

在通过古水流、轻、重矿物特征等分析鄂尔多斯盆地西南部山西组和下石盒子组主要物源方向的基础上,利
用野外剖面资料、探井岩芯、测井资料,绘制地层厚度、砂层厚度及砂地比等单因素图,并结合沉积相单井相剖面和连
井相对比剖面进行分析,认为山西期主要发育曲流河、曲流河三角洲和滨浅湖相;盒8 期主要发育辫状河、辫状河三角
洲及滨浅湖相。石板沟-环县、平凉-镇原-庆阳、口镇-旬邑-正宁3 个三角洲在山西组-盒8 段继承性发育。
研究区烃源岩及储、盖条件较好,根据生、储、盖特征及测井、试气成果,选出“镇原-庆城-环县”勘探有利区和“旬
邑-淳化”勘探远景目标区。盆地西南部勘探程度虽然偏低,但勘探潜力巨大。

关键词: 鄂尔多斯盆地, 山西组, 盒8 段, 沉积体系, 天然气

Abstract:

The main provenances of the Shanxi Formation and Member 8 of Xiashihezi Formation in southwest Ordos Basin
are analyzed on the basis of field geological profile,the core wells,logging data single factor graphs such as stratigraphic
thickness,sand thickness and sand ratio are plotted. Combined with sedimentary facies of single well facies profile and well
comparing to profile,we find the sedimentary period of Shanxi formation mainly include meandering river,meandering river
delta and shallow lake facies. During the deposition of Member 8 of Xiashihezi Formation,braided river,braided river delta
and shallow lake facies developed. Shibangou-Huanxian,Pingliang-Zhenyuan-Qingyang,Kouzhen-Xunyi-Zhengning delta
succession develop in the Shanxi Formation and Member 8 of Xiashihezi Formation. Study area has good hydrocarbon source
rock and reservoir and cap conditions. According to the source rock,reservoir,cap characteristics and well logging,gas test
results,we select“Zhenyuan-Qingcheng-Huanxian”as favorable exploration area and“Xunyi-Chunhua”exploration target
area. Althoughnatural gas exploration degree is not adequate,the exploration potential is tremendous in southwest Ordos
Basin.

Key words: Ordos Basin, Shanxi Formation, Member 8 of Xiashihezi Formation, depositional system, natural gas

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