【作者】 朱伟；

【导师】 陈开远；

【作者基本信息】 中国地质大学（北京） ， 矿产普查与勘探， 2005， 博士

【摘要】 本论文以现代沉积学、构造学、经典层序地层学理论及国内外断陷盆地构造坡折带含油气区勘探经验为指导,对江汉盆地西南缘进行了整体解剖,探讨了断裂构造带储集砂体成因模式、分布规律和油气成藏规律,取得的主要成果有: (1)江汉盆地西南缘构造运动控制了二级层序的发育,由构造、气候、物源制约的基准面旋回变化控制了该区三级层序结构。通过研究,建立了浅水断陷湖盆层序充填格架和发育模式。首次提出采穴-复兴场断阶带是追踪早期北北东、北西向两组断裂面发育而成,以万城-复兴场断层等北北东向同沉积断层及其衍生断层组成的扫帚状断裂带形成由采穴-复兴场-谢凤桥、八宝组成的富油断裂构造带。 (2)阐明了该区带下第三系新沟咀组、上白垩系渔洋组发育河流-三角洲沉积体系、浊积扇-半深湖相沉积体系等岩相类型。首次阐述了本区断裂坡折带砂体成因模式和分布规律,结果表明:物源来自西北方向,在采穴高断阶主要发育冲积扇-辫状河砂砾岩体;复兴场断块发育曲流河-三角洲沉积砂体,谢凤桥以西地区主要发育浊积扇砂体。 (3)断裂构造带发育断层-岩性型复合油气藏。油源来自谢凤桥下降盘玫瑰桥洼陷的新沟咀组下段和沙市组上段,属异源侧向阶梯状成藏模式,即新沟咀组下段和沙市组上段的油源沿谢凤桥断层侧向运移至断阶带白垩系河道砂岩中由构造等值线和断层封闭形成新生古储型油藏。 (4)通过钻井测井资料的高分辨率层序地层学对比分析,在白垩系渔洋组划分出六个中期旋回和十七个短期旋回,在沉积微相分析的基础上,分析总结了在基准面旋回各个阶段沉积演化规律。 (5)探索了一套在构造断裂带适用的地质、地球物理技术相结合的油藏预测方法技术。运用神经网络波形分析技术,定性识别砂岩扇体及发育规模;以高分辨率层序地层学相控砂层对比技术为核心,选用约束稀疏脉冲波阻抗反演更多还原

【Abstract】 Based on the theory of modern sedimentary , tectonics , classical sequence stratigraphy and successful experiences of Oil & Gas exploration in the structural slope-break zone ,this paper goes deep into studying completely sedimentary system and model in south-western part of JiangLing Basin, indicates the distribution of some sandy bodies and purposes pool-forming mechanism of fault block zone . There are some conclusions and views as follows. (1) In south-western part of JiangLing Basin, tectonic evolution controlled the 2-order sequences, and affected by tectonic, climate and sedimentary supplements, changes of the base level cycle control the 3-order sequences. It is the first time to found up the sequence stratigraphic framework in studying area and deposit pattern based on the fault subsidence lacustrine basin. This paper put forward that Cai xue-Fu xingchang fault block zone ,which was called broom-like fault zone, cut by NNE fault , NW fault and their derived one , form a oil-rich fault block zone . (2) In this paper, the author illustrated the depositional system and model in studying area, and distinguished 14 kinds of lithofacies and 3 kinds of depositional system which were the alluvial fan and fluvial-delta system, turbidity fan- half deep lacustrine system. It is the first time to expound the genetic pattern and distributing rule of the fault block zone. In this area, the sediment supplements are from nearly north, the alluvial fan-braided fluvial sandy bodies distribute around the Cai xue fault block; the meandering stream-delta sandy bodies are developed in Fu xingchang area; the turbidity fan bodies mainly distribute up the western Xie fengqiao area. (3) The fault block zone developed fault-lithological pool whose hydrocarbon source belong to EX1—ES2 in the Mei Guiqiao depression. The pool , called other-fountain side-direction ladder-shape one,mean that by Xie Fengqiao fault, the cruade oil was migrated to the channel belt sandstones in Fu Xingchang fault block, and then formed New-Generation-Old-Storage reservoirs. (4) With the synthetic sequence analysis of well logging data and core data ,the highly resolution sequence architecture is build in Fu Xingchang fault block in Jiang Ling depression. They are divided into six middle-term cycles and seventeen short-term cycles in Cretaceous Yu Yang formation. Based on the analysis of sedimentary microfacies, this paper summarized the sedimentary evolvement and distribution pattern during the periods of each base level cycle. (5) This paper goes research to some technical problem about isochronal sequence stratigraphy ,the prediction of the subtle reservoirs etc, and then based on the high resolution sequence stratigraphy microfacies correlation and armed with advanced geophysical interpretation and processing , preliminarily establishes a set of reservoir prediction techniques .Using the Neural network wave shape classification to qualitatily identify sandy bodies shape and distribution, adopting the constrained sparse pulse impedence inversion combined with the multiplex seismic parameter attribute extraction and analysis ,such as absorption coefficient, instantaneous frequency, and reflecting telescope, to trace and forcast reservoirs, a north-eastern reservoir belt of K2y3 was predicted in the middle of Fu Xingchang No.1 fault block,and three beneficial reservoirs of K2y4 were predicted in north ,middle,and south-eastern studying area. Through all those work, the exploration was preferablyguided,and the larger economic benefit and social benefit was acquired.更多还原