黄骅坳陷歧口凹陷古近系坡折体系聚砂控藏机制分析

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1、第33卷第4期石油参骆沾届V01．33。No．42011年8月PETROLEUMGEOLOGY&EXPERIMENTAug．·20lI文章编号：1001—6112(2011)04—0371—07黄骅坳陷歧口凹陷古近系坡折体系聚砂控藏机制分析周立宏，蒲秀刚，周建生，肖敦清，陈长伟，王书香，侯志，林常梅，夏彦渊(中国石油大港油田公司，天津300280)摘要：通过构造背景人手．充分考虑沉积因素．提出了斜坡Ⅸ坡折体系的概念．指出黄骅坳陷歧口凹陷发育了构造坡折带(陡坡、缓坡)、挠曲坡折带、沉积坡折带、古地貌坡折带及侵蚀坡折带5种类型．其分布受古构造背景，断裂活动与沉积成岩因素的交互影响．类

2、似于沉积体系．歧El凹陷坡折体系中各种类型坡折带平面上匹配．垂向上共生．其分布达歧I=1凹陷平面面积的70％以上．坡折带既是物源水下供给通道又是可容纳空间分布区．造就了斜坡及洼陷区的砂体十分富集·砂体分布具有“物源供砂·沟槽输砂，坡折控砂．源型聚砂”的内在机制。广泛发育的储集体使得歧口凹陷古近系油气分布具有满凹含油·叠合连片·优势富集．匹配控藏的典型特征．由此指出了歧北斜坡、滨海斜坡、板桥次凹等的坡折带与洼陷区是目前歧口凹陷古近系地层岩性油气藏勘探的有利区域．关键词：斜坡区；坡折带；坡折体系；岩性地层油气藏；歧口凹陷；黄骅坳陷；渤海湾盆地中图分类号：TEl22．3文献标识码：AS

3、and--gatheringandreservoir·-controllingmechanismsofPaleogeneslope-breaksysteminQikouSag，HuanghuaDepression，BohaiBayBasinZhouLihong，PuXiugang，ZhouJiansheng·XiaoDunqing，ChenChangwei，WangShuxiang。HouZhi。LinChangmei，XiaYanyuan(DagangOilFieldCompany．PetroChina·Tianjin300280·China)Abstract：Basedont

4、ectonicintoconsiderationofsedimentaryelement，thecon—backgroundandtakingtheQikouSag，5typesofslope-breakzonehavebeenceptofslope—breaksystemhasbeenproposed．Infoundinthestudyarea。includingtectonic(steepandgentleslopes)，flexural，sedimentary，ancientlandscapeanderosiveones．Thedistributionofslope—bre

5、akzoneisinfluencedbyancienttectonicback—ground，fauhactivityandsedimentarydiagenesis．Similartosedimentarysystem，varioustypes0toverslopc-breakintheQikouSagmatchwitheachotherbothhorizontallyandvertically，accountingfor70％ofthesagarea．Slope—breakprovidesunderwaterchannelforsourcesupply，andalsooffe

6、rsaccom—distributioniscontrolledbythemodation。resultinginsandassemblageinslopeanddepression．Sandsandfollowingmechanism：sourceprovidingsand，groovetransportingsand·slope—breakcontrollingandsourcetypedeterminingsandgathering．Thankstowide-distributedreservoir，petroleumhasbeenfoundalloverthesag．Th

7、eQibeiandBinhaislopesandtheBanqiaosubsagarethefavorableexplorationreservoirintheQikouSag．regionsforPaleogeneIithologicreservoir；QikouSag；Keywords：slopearea；slope—breakzone；slope．breaksystem；litho—stratigraphicHuanghuaDepression；BohaiBayBasin陆