| 百色盆地百岗组高分辨率层序分析及研究意义 |
| |
| 关键词:high-resolution sequence stratigraphy base-level cycle sequence sequence interface Baigang Formation Baise basin |
| 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” |
|
| 摘要点击次数: 6902 |
| 全文下载次数: 3950 |
| 摘要: |
| The Analysis of High-Resolution Sequence Stratigraphy of Baigang Formation in Baise Basin and Its Significance |
| 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. |
| PENG Jun,CHEN Jing-shan,ZHENG Rong-cai,CAI Xun-yu,WEI Jing-chun.2002.The Analysis of High-Resolution Sequence Stratigraphy of Baigang Formation in Baise Basin and Its Significance[J].Acta Geoscientica Sinica,23(2):153-158. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|