2 345 on the deposition. The high-value areas of mudstone thickness were the main developmental areas for the mudstone where were mainly semi-deep lak

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1 GLOBAL GEOLOGY Vol. 32 No. 2 Jun : 敦化盆地北部凹陷古近系珲春组和新近系土门子组共识别出 6 个三级层序通过多道地震统计法提取子波, 制作敦参 1 井合成记录, 完成了层位标定通过层序地层格架内基于模型的井约束反演得出高分辨率反演数据体, 刻画出目的层砂地比和泥岩厚度平面展布特征砂地比等值线图显示 SH 1 -ST 2 沉积时期物源主要来自凹陷东南侧在整个新生界沉积时期, 主要物源供给方向变化不大, 但供给强度逐渐加强在各层序单元中, 砂地比低值区泥岩厚度高值区地层厚度高值区与构造沉降高值区基本重合, 表明断裂对沉积具有较强的控制作用泥岩厚度高值区为泥岩的主要发育区域, 由于该区主体为半深湖 - 深湖沉积, 因此初步预测该区为烃源岩发育的有利区域 : 敦化盆地 ; 波阻抗 ; 砂地比 ; 岩性解释 : P534. 6; P : A doi: /j. issn Cenozoic lithologic interpretation of seismic data and geological significance of the northern depression of Dunhua Basin CHENG Li-juan 1 LIU Zhao-jun 1 2 CHEN Yong-cheng 3 MENG Qing-tao 1 HU Fei 1 XU Jin-jun 1 1. College of Earth Sciences Jilin University Changchun China 2. Jilin Province Key-Lab for Mineralization and Exploration & Development of Oil Shale and Coexisting Mineral Resources Changchun China 3. Exploration and Development Research Institute Northeast Oil and Gas Branch SinoPEC Changchun China Abstract Six third-order sequences in Paleogene Hunchun Formation and Neogene Tumenzi Formation in the northern depression of Dunhua Basin have been identified. By extracting the wavelets through multi-channel seismic statistical method and making synthetic seismic record of DC1 well the authors completed the horizon calibration. Using the high-resolution inversion data volumes got from model-based well constraint in sequence stratigraphic framework the authors depicted the plane distribution characteristics of sand content and sand thickness of the target layer. The contour maps of sand content showed that the provenance was mainly from the southeast of the sag during the deposition of the SH 1 - ST 2. Throughout the Cenozoic sedimentary period the supply directions of provenance did not change much but the intensity gradually strengthened. The low-value areas of sand content the high-value areas of the mudstone thickness the high-value areas of the stratigraphic thickness and the high-value areas of tectonic subsidence were coincident in each sequence unit indicating that the fractures had strong control GYXQ

出目的层砂地比和泥岩厚度平面展布特征砂地比等值线图显示 SH 1 -ST 2 沉积时期物源主要来自凹陷东南侧在整个新生界沉积时期, 主要物源供给方向变化不大, 但供给强度逐渐加强在各层序单元中, 砂地比低值区泥岩厚度高值区

2 2 345 on the deposition. The high-value areas of mudstone thickness were the main developmental areas for the mudstone where were mainly semi-deep lake-deep lake deposits thus it can be preliminary predicted that these areas would be the most potential areas of hydrocarbon source rocks. Key words Dunhua Basin wave impedance sand content lithologic interpretation km 50 km km km NNE Fig. 1 Tectonic units of Dunhua Basin

lake-deep lake deposits thus it can be preliminary predicted that these areas would be the most potential areas of

3 sn Fig. 2 Seismic section of sn line a T m m 8 T e b m m Fig. 3 3 T e Tn 1 Structural maps of T e and Tn 1 reflection horizons in northern sag of Dunhua Basin

1 3a T 0-790 m 1 5 000 m 8 T e - 3 705 3b m 1 2 000 m

4 SH 1 ST 2 4 SH 1 2 SH 1 SH m 4 ST 1 ST 2 ST 3 ST 4 2 ST m 4 Fig. 4 4 SH 1 ST 2 Stratum thickness graphs of SH 1 and ST 2 stratigraphic units in northern sag of Dunhua Basin 子波提取层位标定

5 HRS elog 1 5 Fig Synthetic record of Well DC 波阻抗模型的建立 25% 2 ms 各层时速关系 Vn = 1 /tn tn V T 主要反演参数的选取 6 10

6 SH 2 a ST 2 b Fig. 6 Time-velocity relationship of SH 1 a and ST 2 b stratigraphic units 砂地比岩性数据的提取 Table 2 Time-velocity fitting formula of mudstone of Hunchun and Tumenzi formations ST 4 V = T V =1 349e T V = T sn2125 ST 3 V = T V = 2005e T V = T Table 1 ST 1 V = T V = e T V = T SH 2 V = T V = e T V =0. 877T Time-velocity fitting formula of sandstone of Hunchun and Tumenzi formations ST 4 V = T V = e T V = T ST 3 V = T V = e T V = T ST 2 V = T V = e T V = T ST 1 V = T V = e T V = T SH 2 V = T V = e T V = T SH 1 V = T V = e T V = T ST 2 V = T V = e T V = T SH 1 V =2E -06T V = e T V = T a ρ V 1

698 7T +1 954. 2 - SH 2 V =102. 16T 0. 457 9 V =1 868. 4e 0. 000 3T V =0. 877T +1 604. 4 Time-velocity fitting formula of sandstone of Hunchun and Tumenzi formations ST 4 V =255. 26T 0.

7 b Fig. 7 7 sn237 a b Profile of inversion wave impedance and sand-ground ratio of sn237 line 4 SH 1 -ST 2 8 SH 1 SH 2 ST 1 - ST SH 1 -ST 2 9 SH m ± DC1 - < 50 m 400 m 10 - DC

8 2 351 Fig. 8 8 SH 1 -ST 2 Contour map of sand content of SH 1 - ST 2 unit Fig. 9 9 SH 2 10 DC1 SH 2 Contour map of mudstone thickness of SH 2 unit Fig. 10 Histogram of Well DC1

9 WANG Hai-feng ZHANG Ting-shan DAI Chuan-rui 4 et al. Stratigraphic division and correlation of the Upper Jurassic-Pliocene in the Dunhua Basin J. Geology in China J ZHAO Ying-li LIU Yong-jiang HAN Guo-qing et al. 1. 3D finite element simulation on sinistral strike-slip of J YU Ming-de WANG Pu-jun WANG Rong-xin et al. Source rock characteristics and oil-gas resource potential in Dunhua Basin J. Geological Science and Technology Information University of Petroleum Press J WU Jun-hua LUO Jia-qun YAN Yong-xin et al. Petroleum geologic conditions and exploration prospects of M LIU Zhao-jun DONG Qing-shui WANG Si-min et al. Dunhua Basin J. Journal of Oil and Gas Technology Introduction to contimental sequence stratigraphy &application M. Beijing Petroleum Industry Press J SUN Hui LIU Wan-song WANG Hong-chang. Tectonic framework of Dunhua Basin based on gravity and magnetic characteristics J. Global Geology Beijing Petroleum Industry Press J. 12. J CHEN Xiao-hui ZHANG Ting-shan XIE Xiao-an et al. Evolution and depositing response in Dunhua Basin J. Journal of Southwest Petroleum University Science & Technology Edition J. J YAO Wu-jun WANG Hai-feng ZHANG Bai-lin et al. A discussion on the lower Cretaceous in the Dunhua Basin J. Journal of Stratigraphy J Dunhua -Mishan fault J. Global Geology M LU Ji-meng WANG Yong-gang. The principle of seismic exploration Third edition M. Qingdao China 10 Posamentier H W Vail P R. Eustatic controls on clastic deposition Ⅱ-sequence and systems tract models J. SEPM Special Publication M LI Qing-zhong. Toward a fine exploration road M LU Zhan-wu HAN Li-guo. The development of the research of the wave impedance inversion technique J. Global Geology LIU Yan-jun LIU Da-meng NIAN Jing-bo et al. Well logging restricted wave impedance inversion and its application under the control of sedimentary rules J. Petroleum Geology & Oilfield Development in Daqing J

Source rock characteristics and oil-gas resource potential in Dunhua Basin J. Geological Science and Technology Information 2008 27 5 65-70. 2. University of Petroleum Press 2009 261-275. J. 2007 29 9.

10 CHEN Ping. Seismic inversion technique in Miyang depression reservoir prediction J. Petroleum Geology & Oilfield Development in Daqing J LI Qing-zhong. On strategy of seismic restrieted inversion J. Oil Geophysical Prospecting J ZHANG Di LIU Zhao-jun FANG Shi et al. Multi-parameters well constrained inversion method in sequence HAN Xiao-jun ZHAO Xian-sheng WANG Jian-min. stratigraphic framework prediction the lithology of Eocene Analysis of influential factors for wave impedance inver- Xin 'ancun Formation in Tangyuan faulted depression sion result J. Petroleum Geology & Oilfield Development in Daqing J. SD JIA Cheng-zao ZHAO Wen-zhi ZOU Cai-neng et al. Two key technologies about exploration of stratigraphic /lithological reservoirs J. Petroleum Exploration and Development Geology M M WANG Ying-min CHEN Chong-he XU Zhang-you. Theory technology and application of seismic reservoir prediction M. Beijing Petroleum Industry Press J ZHANG Xiao-ling QIAN Yun-sheng. Model-based broad-band constrained inversion J. Progress in Exploration Geophysics J. J. Journal of Jilin University Earth Science Edition Suppl J JIA Jian-liang LIU Zhao-jun CHEN Yong-cheng et al. Lithologic prediction and application of log-constrained seismic an example from SD2 segment of Dalianhe Formation in Tangyuan fault depression J. Global JIANG Zai-xing. Sedimentology M. Beijing Petroleum Industry Press

Multi-parameters well constrained inversion method in sequence 4 92 93. HAN Xiao-jun ZHAO Xian-sheng WANG Jian-min.

1 79 Key words Tarim Basin Bachu -Maigati area Silurian growth fault sandy dispersion system Fig. 1 1 Overview of Bachu -Maigaiti regio

1 79 Key words Tarim Basin Bachu -Maigati area Silurian growth fault sandy dispersion system Fig. 1 1 Overview of Bachu -Maigaiti regio 34 1 2015 3 GLOBAL GEOLOGY Vol. 34 No. 1 Mar. 2015 1004 5589 2015 01 0078 10 1 1 2 1 1 3 1. 130061 2. 210046 3. 132013 P534. 43 P542. 3 A doi 10. 3969 /j. issn. 1004-5589. 2015. 01. 009 Syngenetic fault