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物探与化探  2020, Vol. 44 Issue (2): 406-411    DOI: 10.11720/wtyht.2020.1397
  方法研究·信息处理·仪器研制 本期目录 | 过刊浏览 | 高级检索 |
煤层发育条件下薄储层预测方法研究
杨雪1, 裴家学1, 何绍勇1, 蒋学峰1, 谢天寿2, 高建军1
1. 中石油辽河油田勘探开发研究院,辽宁 盘锦 124010
2. 中石油新疆油田勘探开发研究院,新疆 克拉玛依 834000
Research on thin reservoir prediction method in the coal seam distribution area
Xue YANG1, Jia-Xue PEI1, Shao-Yong HE1, Xue-Feng JIANG1, Tian-Shou XIE2, Jian-Jun GAO1
1. Exploration and Development Research Institute of Liaohe Oil Field CNPC, Panjin 124010, China
2. Exploration and Development Research Institute of Xinjiang Oil Field CNPC, Keramay 834000, China
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摘要 

玛湖凹陷在侏罗纪时期整体处于浅水沉积环境,湖盆宽缓、基底振荡,在凹陷西侧斜坡区沉积多套砂泥岩薄互层,易于形成岩性油气藏;该时期还沉积多套煤层,煤层的发育对下部地层的地震响应产生屏蔽作用,造成砂泥层的波阻抗无明显差异,无法进行常规的储层反演预测。通过测井曲线对岩性变化敏感性分析,采用密度和中子曲线共同构建拟声波曲线,使得该曲线削弱煤层影响,能够清晰地反映地层岩性的差异;并以此为约束条件进行拟声波地震反演,解决了该区薄储层预测的难题,取得较好的应用效果。

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杨雪
裴家学
何绍勇
蒋学峰
谢天寿
高建军
关键词 玛西斜坡区煤层薄储层拟声波反演储层预测    
Abstract

There are multiple combinations of sandstone and mudstone interbeds and also plenty of coal seams in the middle-shallow strata of Mahu sag's slope zone, due to the slow slope background and shallow lake environment of water oscillation since Jurassic. In addition, the lithologic reservoir can be found in the zone, but the shielding effect of coal seam makes it impossible to predict the reservoir, due to the unclear response of the thin interbed from seismic and acoustic logs. Therefore, the wave impedance inversion cannot distinguish sandstone from mudstone clearly. In view of such a situation, the technique of Pseudo-acoustic curve reconstruction was used in this study. By analyzing multiple well logs, the density and neutron curves, which can weaken the influence of coal seam and reflect the characteristics of sandstone and mudstone interbeds, were selected to rebuild pseudo-acoustic curves and then perform inversion with the rebuilt curves, thus improving greatly the accuracy of reservoir prediction.

Key wordsMahu sag's slope zone    coal seam    thin-interbed sandstone    pseudo-acoustic inversion    reservoir prediction
收稿日期: 2019-08-14      出版日期: 2020-04-22
ZTFLH:  P631  
基金资助:中国石油天然气股份公司重大科技攻关项目(2017XPT-Y-B-0009)
作者简介: 杨雪 (1974-),女,汉族,新疆昌吉人,高级工程师,长期从事构造及储层特征研究工作。Email: 280277083@qq.com
引用本文:   
杨雪, 裴家学, 何绍勇, 蒋学峰, 谢天寿, 高建军. 煤层发育条件下薄储层预测方法研究[J]. 物探与化探, 2020, 44(2): 406-411.
Xue YANG, Jia-Xue PEI, Shao-Yong HE, Xue-Feng JIANG, Tian-Shou XIE, Jian-Jun GAO. Research on thin reservoir prediction method in the coal seam distribution area. Geophysical and Geochemical Exploration, 2020, 44(2): 406-411.
链接本文:  
http://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1397      或      http://www.wutanyuhuatan.com/CN/Y2020/V44/I2/406
Fig.1  玛湖凹陷区域构造纲要
岩 性 中 子 密度
/(g·cm-3)
时差
/(μs·ft-1)
纵波速度
/(m·s-1)
纵波阻抗
/(g·cm-3·m·s-1)
煤 层 0.30~0.64 1.36~2.32 90~125 2400~3300 3200~7600
泥 岩 0.27~0.51 1.67~2.63 75~88 3500~4100 5800~10800
储层砂岩 0.19~0.42 1.58~2.46 71~77 3900~4300 7200~10500
致密砂岩 0.16~0.33 2.45~2.62 59~68 4500~5200 11000~13600
Table 1  不同岩性的岩石物理参数与部分测井响应特征统计
Fig.2  M612井综合测井曲线
Fig.3  原始声波曲线(a)与拟声波曲线(b)地震合成记录对比
Fig.4  原始声波曲线反演剖面(a)与拟声波曲线反演剖面(b)对比
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