石油与天然气地质 ›› 2012, Vol. 33 ›› Issue (5): 766-777.doi: 10.11743/ogg20120514

• 层序与储层 • 上一篇    下一篇

渤南洼陷北部陡坡带沙河街组砂砾岩有效储层物性下限及其主控因素

李文浩1, 张枝焕1, 昝灵2, 张立生3   

  1. 1. 中国石油大学 油气资源与探测国家重点实验室, 北京 102249;
    2. 中国石化 华东分公司 石油勘探开发研究院, 江苏 南京 210011;
    3. 中国石化 胜利石油管理局 录井公司, 山东 东营 257000
  • 收稿日期:2012-04-12 修回日期:2012-08-13 出版日期:2012-10-28 发布日期:2012-11-15
  • 作者简介:李文浩(1985-),男,博士,油气成因机理与分布预测。
  • 基金资助:

    "十一五"国家科技重大专项(2008ZX05002-006-007HZ)。

Lower limits of physical properties and their controlling factors of effective coarse-grained clastic reservoirs in the Shahejie Formation on northern steep slope of Bonan subsag,the Bohai Bay Basin

Li Wenhao1, Zhang Zhihuan1, Zan Ling2, Zhang Lisheng3   

  1. 1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;
    2. Research Institute of Exploration and Development, SINOPEC East China Company, Nanjing, Jiangsu 210011, China;
    3. Logging Corporation of Shengli Oilfield, SINOPEC, Dongying, Shandong 257000, China
  • Received:2012-04-12 Revised:2012-08-13 Online:2012-10-28 Published:2012-11-15

摘要:

结合研究区测井解释成果和油田试油资料,综合应用分布函数曲线法和试油法,确定了渤海湾盆地渤南洼陷北部陡坡带沙河街组不同深度段的砂砾岩有效储层物性下限,并拟合出物性下限与深度的关系式,在此基础上分析了岩性、沉积相、成岩阶段、地层压力等对砂砾岩有效储层发育的影响。研究结果表明:有效储层物性下限有随埋深增加而逐渐降低的趋势;有利的沉积相带是砂砾岩有效储层发育的关键因素,对储层质量起决定性作用。研究区有效储层主要分布于西部的滑塌浊积扇及中东部近岸水下扇的扇中亚相;其中近岸水下扇的扇中亚相最为有利,其次为滑塌浊积扇。成岩作用也在一定程度上影响有效储层物性。研究区砂砾岩体主要处于中成岩阶段A1和A2亚期,对应于有机质热演化的主要生油气阶段,有利于形成次生孔隙,其中溶蚀作用使得深部储层物性变好。研究区地层压力对有效储层物性的影响较小。

关键词: 有效储层, 物性, 砂砾岩储层, 北部陡坡带, 渤南洼陷, 渤海湾盆地

Abstract:

This paper determined the lower limits of physical properties for the effective coarse-grained clastic reservoir rocks in different intervals of the Shahejie Formation on northern steep slope of Bonan subsag,the Bohai Bay Basin by integrating the distribution function curve and production test methods combined with logging and production testing data.The relational expressions between the lower limits of physical properties and depths were also defined through matching.On this basis,this paper analyzed the effects of lithology,sedimentary facies,diagenetic stage and formation pressure on the formation of effective reservoir rocks.The lower limits of physical properties of effective reservoirs decrease with the increasing depth.Favorable sedimentary facies is the key factor controlling the development of effective coarse-grained clastic reservoirs,and determine reservoir quality.The effective reservoirs area are mainly distributed in the western slump turbidite fans and the midfan of the central and eastern nearshore subaqueous fans in the study,the latter is better.Diagenesis also affect reservoir quality to a certain extent.The coarse-grained clastic reservoirs developed mostly at A1 and A2 substage of middle diagenetic stage,which correspond to the major hydrocarbon generation stage during organic thermal evolution,which is favorable for the formation of secondary porosity,with dissolution improving the quality of deep reservoir rocks.,Formation pressure has little effect on effective reservoir rocks.

Key words: effective reservoir, physical property, coarse-grained clastic reservoir, northern steep slope, Bonan subsag, Bohai Bay Basin

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