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1、第33卷第4期石油參駱沾屆V01．33。No．42011年8月PETROLEUMGEOLOGY&EXPERIMENTAug．·20lI文章編號(hào)：1001—6112(2011)04—0371—07黃驊坳陷歧口凹陷古近系坡折體系聚砂控藏機(jī)制分析周立宏，蒲秀剛，周建生，肖敦清，陳長偉，王書香，侯志，林常梅，夏彥淵(中國石油大港油田公司，天津300280)摘要：通過構(gòu)造背景人手．充分考慮沉積因素．提出了斜坡Ⅸ坡折體系的概念．指出黃驊坳陷歧口凹陷發(fā)育了構(gòu)造坡折帶(陡坡、緩坡)、撓曲坡折帶、沉積坡折帶、古地貌坡折帶及侵蝕坡折帶5種類型．其分布受古構(gòu)造背景，斷裂活動(dòng)與沉積成巖因素的交互影響．類
2、似于沉積體系．歧El凹陷坡折體系中各種類型坡折帶平面上匹配．垂向上共生．其分布達(dá)歧I=1凹陷平面面積的70％以上．坡折帶既是物源水下供給通道又是可容納空間分布區(qū)．造就了斜坡及洼陷區(qū)的砂體十分富集·砂體分布具有“物源供砂·溝槽輸砂，坡折控砂．源型聚砂”的內(nèi)在機(jī)制。廣泛發(fā)育的儲(chǔ)集體使得歧口凹陷古近系油氣分布具有滿凹含油·疊合連片·優(yōu)勢(shì)富集．匹配控藏的典型特征．由此指出了歧北斜坡、濱海斜坡、板橋次凹等的坡折帶與洼陷區(qū)是目前歧口凹陷古近系地層巖性油氣藏勘探的有利區(qū)域．關(guān)鍵詞：斜坡區(qū)；坡折帶；坡折體系；巖性地層油氣藏；歧口凹陷；黃驊坳陷；渤海灣盆地中圖分類號(hào)：TEl22．3文獻(xiàn)標(biāo)識(shí)碼：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陸
