四川盆地栖霞组岩溶储层及勘探选区-论文.pdf

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1、第34卷第5期石油学报Vo1．34No．52{)13年9月ACTAPETROLEISINICASept．2013文章编号：0253—2697(2013)05—0833—10DOI：10．7623／syxb2013050O4四川盆地栖霞组岩溶储层及勘探选区王海真池英柳赵宗举江青春鲁卫华(1．中国石油勘探开发研究院北京100083；2．中国石油学会北京100724)摘要：针对四川盆地中二叠统栖霞组岩溶成因及古地貌分布特征认识不清的问题，开展了岩溶储层地质响应分析。研究发现，四川盆地栖霞组层间岩溶储层是由于三级层序界面暴露溶蚀及高位体系域的高频层序

2、界面短暂暴露形成。结合栖霞组厚度、古地理环境及水动力特征分析，将四川盆地栖霞组顶部划分为3类地貌单元，即川西中缓坡生屑滩、川东北台内滩和川南泸州古隆起。川西中缓坡生屑滩和川东北台内滩所形成的沉积微地貌高地和川南泸州古隆起及其斜坡区是栖霞组层间岩溶储层发育的优势地带。根据这一认识并结合烃源岩生烃强度特征将栖霞组岩溶储层划分为4个有利勘探区带。关键词：四川盆地；栖霞组；层间岩溶；古地貌；储层中图分类号：TE112．2文献标识码：AKarstreservoirsdevelopedintheMiddlePermianQixiaFormationofS

3、ichuanBasinandselectionofexplorationregionsWANGHaizhenCHIYingliuZHAOZongju。JIANGQingchunLUWeihua(1PetroChinaResearchInstituteofPetroleumExploration&Development，Beijing100083，China：2．ChinesePetroleumSociety，Beijing100724)Abstract：Inviewoftheincompleteunderstandingonthekarsto

4、riginanddistributioncharacteristicsofpaleo—landformoftheMiddlePermianQixiaFormationintheSichuanBasin，westudiedgeologicalresponsesofitskarstreservoirsthoroughly．Theresearchindi—catedthatQixiainterlayerkarstswereformedduetOtheexposureanderosionofthird—gradesequenceboundariesa

5、ndthetransientexposureofhigh—frequencysequenceinterfacesofthehighstandsystemstract．Basedontheisopachmap，pa1eogeographicenviron—mentandhydrodynamicforcesoftheQixiaFormation，itstoppaleo—landformwasdividedintothreesecondgradegeomorphicunits，i．e．themiddlerampfaciesbeltinwestern

6、Sichuan，theinnerplatformshoa1faciesbeltinnortheasternSichuanandtheLuzhoupa—leo—upliftinsouthernSichuan．Thesedimentarymicrotopographichighformedbothinbioclasticbeachesofthemiddlerampofwest—ernSichuanandininner—platformshoalsofnortheasternSichuan，alongwiththepaleo—upliftandit

7、sslopesofsouthernSichuan，isfavorableforthedevelopmentofkarstreservoirsintheQixiaFormation．Onthebasisofthisnewunderstandingandcharacteristicsofthehydrocarbongeneratingintensityofsourcerocks，fourfavorablezoneswereproposedfortheexplorationofkarstreservoirsintheQixiaFormation．K

8、eywords：SichuanBasin；QixiaFormation；interlayerkarst；paleo—landform；reservoir钻探实例已证