渤海海域南部古水系恢复及其沉积耦合响应预测

通过Global Mapper和ArcGIS软件对内蒙古Jargalant Nuruu与Turgen-Kharkhiraa山系的现代水系及渤海湾盆地埕北低凸起与渤南低凸起的古水系进行拾取，结合边界条件、断裂样式和母岩岩性三要素进行综合分析，认为水系在三要素约束下的组合样式多样:边界条件影响水系汇聚程度，陡坡带水系汇聚程度低，缓坡带水系汇聚程度高；断裂样式影响水系走向，边界断裂与水系走向垂直相交，斜交断裂与水系同向发育；火成岩地层水系样式多样，碳酸盐岩地层水系以亚平行状为主，变质岩地层水系以树枝状为主，整体发育单支平行状水系、羽状水系、梳状水系、亚平行状水系和树枝状水系五种水系样式.结合现代源汇与渤海湾盆地古源汇系统的不同水系样式对应沉积体差异性指出，（1）缓坡/稳定斜坡?边界断裂?火成岩/变质岩物源体系下形成第一级次水系?树枝状水系，沉积体以坡积扇和辫状河三角洲为主，砂体范围大，相对独立，富砂型；（2）缓坡/稳定斜坡?平行断裂?碳酸盐岩/火成岩物源体系下形成最次级水系?亚平行状水系，沉积体以洪积扇和辫状河三角洲为主，扇体范围小，相对独立，富泥型.通过古今类比、校验，准确拾取源区水系分布与发育特征，可有效指导地下沉积区优质沉积体预测，对源汇系统要素耦合具重要推进作用，切实服务地下规模性储集体勘探预测工作. 

Paleo-Drainage Restoration and Prediction of Sedimentary Coupling Response in the Southern Bohai Sea

The modern drainage systems of Jargalant Nuruu and Turgen-Kharkhiraa mountain systems in Inner Mongolia and the paleo-drainage systems of Chengbei low uplift and Bonan low uplift in Bohai Bay basin were picked up by Global Mapper and ArcGIS software, combining the boundary conditions, fracture style and parent lithology, it is considered that water systems are diverse under the combined styles of three elements. Boundary conditions influence the degree of convergence, with low convergence degree of water system in steep slope, and high degree of convergence in slow slope belt. The fracture pattern affects the direction of the water system, in which the boundary fracture intersects the water system vertically, and the oblique crossing fracture develops in the same direction as the water system. Igneous rock has various water system styles, whereas carbonate stratigraphic water system is mainly subparallel, and metamorphic rock formation has dendritic water system. On the whole, there are five styles of single parallel, feather, pectinate, subparallel and dendritic water systems developed. Combining modern source-to-sink system with ancient source-to-sink system of Bohai Bay basin, it shows that different drainage patterns correspond to different sedimentations, including (1) the source system of slow slope/stable slope-boundary fracture-igneous rock/metamorphic rock primary develop firstly water system-dendritic water system, that deposition comprises slope fan and braided river delta, that fan body is large and independent with sand-rich type; (2) slow slope/stable slope-parallel fracture-carbonate rock/igneous rock develop secondary water system-subparallel water system, the sediment comprises alluvial fan and fan dalta, that fan body is small and independent with mud-rich type. The ancient and modern analogy and verification effectively facilitate the prediction of high-quality sedimentary bodies in the underground sedimentary area by accurately picking up the distribution and development characteristics of the water system in the source area, which plays an important role in promoting the coupling of source-to-sink system elements and the exploration and prediction of underground large-scale reservoirs.