| 百色盆地百岗组高分辨率层序分析及研究意义 |
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| 引用本文：彭军,陈景山,郑荣才,蔡勋育,韦景春.2002.百色盆地百岗组高分辨率层序分析及研究意义[J].地球学报,23(2):153-158. |
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| 基金项目:CNPC油气储层重点实验室开放基金项目“前陆盆地高分辨率层序地层学及其研究意义” |
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| 中文摘要:通过地表露头、钻井岩芯、测井资料和地震剖面以及ESR测年数据的综合分析，在百色盆地百岗组内识别出4个级别的层序界面，并研究了各级别层序界面的特征。根据层序界面和湖泛面积识别标志，在百岗组内识别出短期、中期、长期、超长期4种类型的基准面旋回序，具体划分为1个超长期、8个长期、21个中期基准面旋回层序。指出由Ⅴ级层序界面控制的短期基准面旋回层序按结构类型的不同划分为向上“变深”的非对称型、向上变浅的非对称型、对称型等3种类型，由Ⅳ级层序界面控制的中期基准面旋回层序的结构类型与短期基准面旋回层序结构类型相似。在此基础上，讨论了各级次基准面旋回层序的垂向序列、岩性岩相组合、结构类型及叠加样式等特征；探讨了高分辨率层序地层学在地层划分与对比，层序地层格架的建立，确定有利储层发育部位、砂体分布规律及油层和小层砂体精细对比中的应用。 |
| 中文关键词:高分辨率层序地层学 基准面旋回层序 层序界面 百岗组 百色盆地 |
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| The Analysis of High-Resolution Sequence Stratigraphy of Baigang Formation in Baise Basin and Its Significance |
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| Abstract:Through the comprehensive analysis of outcrops, rock cores,well logs, seismic interpretation and ESR data,and under the guidance of the theory and technology of the high-resolution sequence stratigraphy, this paper has dealt with different grades of sequence interfaces in Baigang Formation of Baise basin. According to the identification symptoms of the sequence interfaces and lake flood sedimentation, four-grade base-level cycle sequences, namely short-term, middle-term,long-term,super-long-term cycle sequences,are distinguished,and one super-long-term,eight long-term,twenty-one middle-term base-level cyclic sequences are recognized.On the basis of the above studies,the vertical sequences,facies associations,lithologic components, structural types and stacking patterns are discussed in detail.Among these sequences, the short-term cycle sequence may be divided into three basic types of structures, i.e., upward deepening non-symmetry, upward thinning non-symmetry and symmetry from upward deepening to upward thinning, and further divided into seven subtypes of low or high accommodation and non-complete or nearly complete symmetry. These basic sequence types and subtypes are of various stacking and distribution patterns. The structural type and stacking pattern of the middle-term cycle sequence are identical with those of the short-term cycle sequence. The long-term cycle sequence is of symmetric structure which develops complete depositional sequence of lacustrine transgressive-regressive cycle, and may be divided into three types of cycle structure in the light of the lacustrine transgressive-regressive rate, viz.,the fast rate type,middle rate type and fast rate transgressive-slow rate regressive type. In this paper the application of these different-grade base-level cycle sequences to the stratigraphic division and oil bed correlation, the foundation of sequence stratigraphic framework and the sand body distribution regularity are probed into in the light of these sequence characteristics. |
| keywords:high-resolution sequence stratigraphy base-level cycle sequence sequence interface Baigang Formation Baise basin |
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