【作者】 黄兴文；

【导师】 于兴河；

【作者基本信息】 中国地质大学（北京） ， 矿产普查与勘探， 2006， 博士

【副题名】以准噶尔盆地腹部石南地区为例

【摘要】 本文以准噶尔盆地腹部石南地区侏罗系三工河组～白垩系清水河组一段为研究对象,进行层序地层学、沉积学及油气成藏规律的综合研究,旨在明确坳陷湖盆缓坡层序及其主控因素的特点、沉积体系的时空演化规律以及岩性地层油气藏的分布规律,并以此指导岩性地层圈闭勘探的有利区带预测。首先,以岩心、测井为基础,以三维地震资料为主体,建立石南地区井震结合的坳陷湖盆缓坡层序地层格架;分析并指出其特点在于低位体系域欠发育且类型特别(充填于沟谷残余可容纳空间中的低位体系域);湖侵体系域砂体极发育而高位体系域砂体不发育;剖析缓坡层序的4个主控因素,即构造、气候、物源和湖平面变化,其中构造和气候对坳陷湖盆的影响尤为重要;并结合湖盆及构造的演化特点,建立了本区坳陷湖盆的两种缓坡层序及沉积充填模式,即湖盆扩张期～鼎盛期缓坡层序及沉积充填模式和湖盆重构期缓坡层序及沉积充填模式。而后,在层序格架控制下,以含砂率为纽带,井震结合,实现研究区10个未经连片处理的不同时期采集三维地震数据以体系域/层序为单元的含砂率连片编图:并结合丰富的钻、测井资料,在充分考虑构造及湖盆演化背景前提下,编制了各层序/体系域的沉积相图,并分析其时空演化特征及砂体展布特征。在此基础上,分析了石南及邻区岩性地层油气藏的时空分布规律以及油气成藏主控因素;建立了本区缓坡源外型岩性地层油气藏的成藏模式,即阶梯式运移成藏模式;并对重点层位油气藏的成藏模式进行了个体解剖。最后,综合考虑岩性地层圈闭的形成条件、储盖组合、输导体系、成藏特征及勘探前景等因素,分析并指出了下一步岩性地层油气藏勘探的有利层位,依次为KSQ1低位体系域与湖侵体系域、JSQ3湖侵体系域、JSQ5和JSQ4;平面上基东鼻凸和石西凸起为侏罗系层序的岩性地层圈闭有利区带,三南凹陷中西部为白垩系K—SQ1的岩性地层圈闭有利区带。更多还原

【Abstract】 The paper chose J1s-K1q1 formation in Shinan area, central Jungar basin asresearch object, which was typical gentle slope of depression lake basin andconducted sequence stratigraphic research, depositional facies research and oil poolforming rules research. The aim was to reveal the sequence characteristics and itscontrolling factors, gentle slope depositional system evolution characteristics and oilpools distribution rule, and to direct the lithologic and stratigraphic oil poolsprospective areas.Firstly, dissertation took advantage of abundant 3-D seismic data, core data andlogging data to build the sequence framework in Shinan area, which bears thecharacteristics of gentle slope sequence in depression basin, and summarized itscharacteristics. It was indicated that the sequence. framework has two maincharacteristics. One is that lowstand systems tract (LST) rarely occurs, which is filling inresidual ravine accommodation. The other is that transgressive systems tract (TST)develops thick sands and conglomerate, while highstand systems tract (HST) lacks sand.Based research above, the author further indicated that sequence on gentle slope had fourcontrolling factors, that is, tectonics, climate, provenance and lake level, among whichtectonics and climate had outstanding effects on the sequence and depression lakeevolution. More over, the author took lake and tectonic evolution into account and builttwo gentle slope sequence patterns and corresponding sequence filling pattern indepression lake basin, which were named expanding-peaking period gentle slopesequence pattern and lake-reconstructing period gentle slope sequence pattern and theircorresponding sequences filling patterns.Secondly, the paper chose the" ratio of sand to strata as the bridge betweendrilling data and seismic data, accomplished integrative mapping of 10 3-D seismic data,which haven’t been uniform processed, and mapped six diagrams of ratio of sand tostrata. And also core, logging and other drillings data were applied to map depositionalfacies diagram, and then the author summarized the characteristics of depositional systemsevolution and sands distribution.Thirdly, based on sequence stratigraphic research and depositional system research,the dissertation analysed the time and space distribution rule of lithologic andstratigraphic oil pools in Shinan and adjacent area, and discussed the controlling factorsover oil pools, and then constructed the oil pool forming pattern of lithologic andstratigraphic oil pools in gentle slope, which was outside source rocks. It was indicatedthat the’ pattern was characterized by cascade migration pattern. The author furtheranatomised oil pool forming model of key formations.And finally, comprehensively considering the forming conditions of lithologic andstratigraphic traps, play, migration channel, oil pools forming characteristics andexploration prospective, the dissertation discussed the prospective formation and areas.The results were as follows. LST and TST of K-SQ1 ranked the first, TST of J-SQ3ranked the second, J-SQ5 ranked the second and then was J-SQ4. On the plane,Jidong convex nose and Shixi swell were the prospective area for Jurassic sequence andcentral-west Sannan sag was the prospective area for K-SQ1.更多还原