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时间:2020-03-26
《靖边潜台南部中奥陶统马五1~4亚段沉积演化特征研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、矿物岩石地球化学通报·研究成果·BuI/eti~ofMineralogy,PetrologyandGeochemistryV0【.3ONo.4,Oct.2O1l靖边潜台南部中奥陶统马五1~4亚段沉积演化特征研究罗顺社,霍勇,罗军梅,吕奇奇,尚飞,淡卫东。”,庞锦莲。1.油气资源与勘探技术教育部重点实验室(长江大学),湖北荆州434023;2.长江大学地球科学学院,湖北荆州434023;3.长庆油田公司勘探开发研究院,陕西西安710018;4.国家工程实验室,陕西西安710018摘要:鄂尔多斯盆地中奥陶统马家沟组由于受加里东运动影响而隆起抬升遭受风化,形成良好的岩溶油气储层。因此,对马五段
2、上部马五1~4亚段的沉积微相研究对未来在该层位的油气勘探具有深远的意义。本文运用单因素分析多因素综合作图法结合钻井岩心资料、测井资料的细致分析、统计,选取了白云岩含量、灰岩含量、膏盐含量及泥岩含量等单因素,绘制出马五1~4各地层的沉积微相图。研究表明马五期的沉积格局为局限台地,自西北向东南依次出现台内斜坡、台内浅凹、台内盆缘,其沉积演化从马五4的低海平面期到马五3的海平面上升期再到马五2的顶盛期最后到马五1的海退期,形成一个完整的海进海退沉积旋回,并依据其沉积特征建立了各时期的沉积模式。关键词:鄂尔多斯盆地;马家沟组;沉积演化;碳酸盐岩中图分类号:P594.2文献标识码:A文章编号:10
3、072802(2011)04040708SedimentaryEvolutionofMiddleOrdovicianMa51,、—4SubmembersintheSouthernJingbianTablelandLUOShun—she,HUOYong~,LUOJun~mei,LUQi—qi,SHANGFei_-.DANWei—dong。._.PANGJin—lian。'1.KeyLaboratoryofExplorationTechnologiesforOilandGasResources,MinistryoJ’Education,YangtzeUniversity,Jingzhou43
4、4023,Hubei;2.CollegeofGeoscienceYangtzeUniversity,Jingzhou434023,Hubei;3.ExplorationandDevelopmentResearchInstituteofChangqingOilfield,Xi’an,710018,Shanxi;4.NationalEngineeringLaboratory,Xi’an,710018,ShanyiAbstract:TheMajiagouformation,MiddleOrdovician,intheOrdosBasinhadbecomeanicekarstreservoirs
5、inceitWaSupliftedintheCaledonianmovementanderoded.Anelaborativestudyofmicro—sedimentaryfaciesisofgreatsignificanceintheoil—gasexploration.ThemicrosedimentaryfacemapsofMa51-4submemberswerecompiledfromstatisticsdataofdrillingcoresandlogginganddetailedanalysesofdataobtainedbysinglefactoranalyses(inc
6、ludingcontentsofdolomite,limestone,gypsumandmudstone)andmultifactorcomprehensivemapping.ThestudyhasshownthatthesedimentaryframeworkofMa5membersisrestricted—platform,fromthenorthwesttothesoutheastoftheplatform,itappearsinturnasslope,shallowconcaveandthebasinmargin.Acompletedeposi—tionalcycleoftran
7、sgressionandregressionwasfoundinthesedimentaryevolution,thatis,thelowsealevelofMa5—4submembertothesea—levelrisingMa5—3submemberthentothepeakoftheMa5—2submemberandfinallytotheregressionMa5—1submember.Weestablishedadepos
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