辽河盆地西部凹陷南部沙四段古物源体系分析
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摘要
西部凹陷南部地区构造上属于辽河盆地西部凹陷西斜坡南段,沙四段物源主要来自于西部凸起,复杂的基底结构造成物源种类多样,不同的物源体系造就了不同的沉积砂体类型,因此对该区物源体系的分析有利于明确砂体成因类型,对寻找沙四段优质储集体具有重要意义。本次研究主要是通过对不同地质层位的物源母岩类型、ZTR指数分布、砾岩分布规律等几大方面进行精细研究,详细刻画了本区的物源体系特征,明确了物源体系对砂体展布的控制作用,为下步沙四段勘探有利区的选择奠定了基础。
The southern part of the Western depression belonged to the southern part of the Western slope of the Western depression of the Liaohe Basin. The source of the Sha4 Formation mainly was come from the Western bulge. The complex basement structure caused a variety of source types,and different source systems created different types of sedimentary sand bodies. Therefore,the analysis of the source system in this area is beneficial to the clarification of the formation type of sand body and is of great significance to the search for high-quality storage groups in the Sha4 Formation of sand. This research is mainly based on the detailed study of the types of source parent rocks,the distribution of ZTR indices,and the distribution of conglomerate in different Geological strata. The characteristics of the sediment source system in this area are described in detail,and the control effect of the source system on the distribution of sand bodies is clarified. Laying the groundwork for the selection of areas of interest for the next Sha4 Formation of exploration
The southern part of the Western depression belonged to the southern part of the Western slope of the Western depression of the Liaohe Basin. The source of the Sha4 Formation mainly was come from the Western bulge. The complex basement structure caused a variety of source types,and different source systems created different types of sedimentary sand bodies. Therefore,the analysis of the source system in this area is beneficial to the clarification of the formation type of sand body and is of great significance to the search for high-quality storage groups in the Sha4 Formation of sand. This research is mainly based on the detailed study of the types of source parent rocks,the distribution of ZTR indices,and the distribution of conglomerate in different Geological strata. The characteristics of the sediment source system in this area are described in detail,and the control effect of the source system on the distribution of sand bodies is clarified. Laying the groundwork for the selection of areas of interest for the next Sha4 Formation of exploration
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