塔里木盆地阿瓦提坳陷油气资源潜力分析

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1、第34卷第3期石油参量参沾届Vo1．34．No．32012年5月PETRoLEUMGEoLoGY&EXPERIMENTMay，2012文章编号：1001—6112(2012)03—0257—10塔里木盆地阿瓦提坳陷油气资源潜力分析顾忆，赵永强，贾存善，何光玉，罗宇，王斌，路清华(1．中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所，江苏无锡214126；2．浙江大学地球科学系，杭州310027)摘要：阿瓦提坳陷是目前塔里木盆地勘探程度最低的地区，区内及周缘已发现乌鲁桥油苗、志留系沥青砂岩等油气显示。通过对区域构造背

2、景及其演化、主要烃源岩沉积背景及其地球化学特征的研究，明确阿瓦提坳陷及周缘发育渴湖相、陆棚一斜坡相2类沉积背景不同、地球化学特征有别的主力烃源岩。下寒武统玉尔吐斯组、中上奥陶统萨尔干组、印干组烃源岩以斜坡相为主．是与上升洋流有关的特高丰度烃源岩；中下寒武统则发育以渴湖相为主的较高丰度烃源岩。并提出了本区优质烃源岩的沉积发育模式及其沉积环境的判别指标。通过层序地层、地震相、沉积相研究，开展了层序地层格架下地震相、沉积相约束的烃源岩识别与预测。在典型油藏解剖、油气成藏条件综合分析的基础上，明确了阿瓦提坳陷及邻区有利勘探领域。关键词

3、：烃源岩；油气地球化学；资源潜力；阿瓦提坳陷；塔里木盆地中图分类号：TEl22文献标识码：AAnalysisofhydrocarbonresourcepotentialinAwatiDepressionofTarimBasinGuYi，ZhaoYongqiang，JiaCunshan。，HeGuangyu，LuoYu，WangBin，LuQinghua(1．WuxiInstituteofPetroleumGeology，SINOPEC，Wuxi，Jiangsu214126，China；2．DepartmentofEarthSc

4、iences，ZhejiangUniversity，Hangzhou，Zhejiang310027，China)Abstract：ThedegreeofpetroleumprospectingintheAwatiDepressionisthelowestcomparingwiththatinplat—formdepressionareasoftheTarimBasin．SomeoilandgasshowssuchastheWuluqiaooilshowandtheSilurianasphalticsandstonewerefo

5、undinthedepressionanditssurroundings．Basedonthestudiesofregionaltectonicsettinganditsevolution，depositionalenvironmentsandgeochemicalcharacteristicsofthemainsourcerocks，twodifferentkindsofprinciplesourcerockswithdifferentsedimentarybackgroundsandgeochemicalfeatures，

6、deve—lopedinlagoonalfaciesandcontinentalshelfandslopefaciesrespectively，weredetermined．Sourcerocksdeve-lopedintheLowerCambrianYuertusiFormation，theMiddleandUpperOrdovicianSaerganFormationandYin—ganFormationweredominatedbyslopefaciesandshowedextra-highorganiccontentw

7、hichwasrelatedtoascendingcurrent．AndtheMiddleandLowerCambriansourcerockswithrelativehighorganiccontentweredevelopedinlagoonalfacies．Thesedimentarymodelsfortheformationofqualitysourcerocksandtheidentifica—tionmarksfordepositionalenvironmentswereproposed．Accordingtoth

8、estudiesofsequencestratigraphy，seismicfaciesanddepositionalfacies，theidentificationandpredictionofsourcerocksconfinedbyseismicanddepositio