摘要
采用井—震联合地层恢复法,对辽东湾辽东带中南部的古近纪进行了古地貌恢复。在此基础上拓宽了坡折带研究,将古地貌(包括古坡折带、古沟谷、古凸起等)纳入古物源供给系统的框架内探讨其对沉积体系的控制作用。分析表明:在构建完整物源供给系统的前提下,古地貌诸单元及其组合样式对沉积体系有着明显的控制作用。主要表现为:不同级次的物源体系导致沉积体类型和规模存在差异;物源区沟谷的分布及其赋存时期制约着砂体的主要分布位置、时期及规模;坡折带样式决定砂体的类型、规模及分布;古地貌组合样式控制储集体的成因、富集位置和规模大小。因此,古地貌分析对储层的预测和识别具有明显的指导作用。勘探实践证明,将其与常规储层预测方法联用,能够很大程度地提高储层预测的精度。
The Paleogene palaeogeomorphology reconstruction has been made for the central southern Liaodong Zone of Liaodongwan Bay by a borehole-seismic comprehensive method. Based on this, palaeogeomorphology （including palaeo-slope break belt, palaeo-ditch and valley and palaeo-high etc. ） is integrated into the palaeo-provenance supply system to discuss its control on sedimentary systems. As a result,the research domain of slope break belt is broadened. The analyses show that based on the construction of the complete provenance supply systeun, the ,palaeogeomorphologic units and their combination patterns obviously control the sedimentary systems. The provenance systems with different orders lead to the differences of sedimentary rock types and scales. The distribution of ditch and valley in the provenance area and its existing period restrict the main location, period and scale of the sandbodies. The style of the shape break belt controls the types, scales and distributions of the sandbodies. The palaeogeomorphologic associations control the origin, concentration area and scale of the reservoir. Therefore, palaeogeomorphologic analysis has an obvious instructive effect on the reservoir forecasting and recognition. Combined with the conventional metbods of reservoir prediction, it can greatly increase the precision of reservoir prediction.
出处
《古地理学报》
CAS
CSCD
2007年第2期155-166,共12页
Journal of Palaeogeography：Chinese Edition
基金
国家"十五"重大科技攻关项目(2003BA613A05)资助
关键词
辽东湾
辽东带中南部
古近纪
古地貌
物源供给系统
沉积体系
储层预测
Liaodongwan Bay, central-southern Liaodong Zone, Paleogene, palaeogeq）rnorphology,provenance supply system, sedimentary system, reservoir prediction
