石油与天然气地质 ›› 2015, Vol. 36 ›› Issue (2): 248-254.doi: 10.11743/ogg20150209

• 层序与储层 • 上一篇    下一篇

基于砂体构型精细刻画潮坪砂坝优质砂体——以大牛地气田D17井区太原组2段为例

杨辰雨1, 田景春1, 张翔1, 林小兵1, 刘绪钢2, 曹桐生2, 邢浩婷1   

  1. 1. 成都理工大学 油气藏地质及开发工程 国家重点实验室, 四川 成都 610059;
    2. 中国石化 华北油田分公司 勘探开发研究院, 河南 郑州 450006
  • 收稿日期:2014-12-20 修回日期:2015-01-30 出版日期:2015-04-08 发布日期:2015-05-13
  • 作者简介:杨辰雨(1982-),男,博士研究生,沉积学与储层地质学.E-mail:18686846@qq.com.
  • 基金资助:
    国家科技重大专项(2011ZX05007-04-01).

Configuration-based fine description of high-quality sand bodies in tidal-flat bar-Taking the tight sandstone reservoir in the 2nd member of the Taiyuan Formation in D-17 wellblock in Daniudi gasfield as an example

Yang Chenyu1, Tian Jingchun1, Zhang Xiang1, Lin Xiaobing1, Liu Xugang2, Cao Tongsheng2, Xing Haoting1   

  1. 1. State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
    2. Petroleum Exploration & Production Research Institute of North China Company, SINOPEC, Zhengzhou, Henan 450006, China
  • Received:2014-12-20 Revised:2015-01-30 Online:2015-04-08 Published:2015-05-13

摘要: 以大牛地气田未开发区(D17井区)太原组2段潮坪沉积为研究对象,基于测井、岩性等特征分析,对潮坪砂坝进行了精细刻画,共识别出了砂坝主体、砂坝侧翼及砂坝侧翼叠置3个沉积微相单元,并建立了沉积微相-岩相- 测井相-物性-非均质性-试气成果响应模板。对比结果显示,砂坝主体微相岩性主要为(含砾)石英粗砂岩及岩屑石英砂岩,测井曲线具光滑箱形;砂坝侧翼微相岩性主要为中-细粒砂岩岩屑砂岩、岩屑石英砂岩,测井曲线为齿化箱形、齿化钟形以及漏斗形。根据砂体组合类型,区域上划分出了砂坝主体型砂体带与砂坝侧翼型砂体带。前者砂坝宽度为6~8 km,砂体平均厚度为14.5 m,砂地比平均值为0.53,平均渗透率为0.48×10-3 μm2。后者砂坝宽度为4~6 km,砂体平均厚度为10.56 m,砂地比平均值为0.36,平均渗透率为0.36×10-3 μm2。砂坝主体型砂体带砂体发育规模大,分布范围广,砂体物性好,中等非均质性,试气成果明显,应作为优先开发的地区。

关键词: 非均质性, 砂坝, 潮坪, 优质砂体, 太原组, 大牛地气田

Abstract: Logging data and lithological analyses of the tidal-flat depositsin the 2nd member of the Taiyuan Formation(D-17 wellblock)in the Daniudi gas field revealed three sedimentary microfacies:mainsandbar,sandbar flanking and overlain sandbar flanking-.A response-template of sedimentary micro-facies-lithofacies-logging facies-physical property-heterogeneity-gas test was also established.Correlation shows that the main sandbar is mainly gravel-bearing quartzose laterite and lithic quartz sandstone,corresponding to smooth-box type logging curves;and thelatter two are mainly medium-to fine-grained lithic sandstone and quartz sandstone,corresponding to dented box-and bell-shaped or funnel-shaped logging curves.Regionally,two belts were identified based on sand body assemblage types:sand body belt consisting main sandbar and sand body belt consisting sandbar flanking.The former is 6-8 km wide,and has an average thickness of 14.5 m,an average net-to-gross ratio of 0.53 and an average permeability of 0.48×10-3 μm2.The latter is 4-6 km wide and has an average thickness of 10.56 m,an average net-to-gross ratio of 0.36 and an average permeability of 0.36×10-3 μm2.The former with its well developed and widely distributed sand bodies is considered to be a better development target as it has better physical properties and strong heterogeneity and good gas testing results.

Key words: heterogeneity, sand bar, tidal-flat, high-quality sand body, Taiyuan Formation, Daniudi gasfield

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