松辽盆地大老爷府油田泉四段三角洲前缘的沉积微相组合及特征  

Microfacies Combination and Characteristics of Delta Front within the 4^(th) Member of the Quantou Formation in the Dalaoyefu Oil Field, Southern Songliao Basin

作　　者：刘自亮[1] 仲国生[2] 李现根[1] 

机构地区：[1]中国地质大学沉积盆地研究所,北京100083 [2]吉林油田公司,吉林松原138000

出　　处：《地球学报》2008年第2期228-234,共7页Acta Geoscientica Sinica

基　　金：国际地质对比计划IGCP447项目(编号:SC/GEO/546/447);科技部国家重点基础研究项目(编号:001CB711002);国家自然科学基金(编号:40172043,40572073);中国地质调查局项目(编号:200313000055)资助

摘　　要：松辽盆地南部大老爷府地区早白垩世泉头组泉四段,三角洲前缘沉积体系中以水下分流河道和河口坝两种储油微相为主导的多种微相组合,提出将其划分为"水下分流河道区"、"水下分流河道与河口坝混合区"和"河口坝区"三段微相组合区。将水下分流河道进一步划分为废弃型、完整型和多期叠加型3种;识别出坝上河混合微相组合;将河口坝组合再划分为完整型河口坝和叠加型河口坝。讨论了在坳陷湖盆条件下三角洲前缘厚层储集砂体各微相组合的形成机制以及分布模式。The delta front was developed in Early Cretaceous strata of Dalaoyefu area, Songliao basin. This paper has studied the variety of microfacies combination, dominated by the distributary channel and mouth bar, in the delta front depcsitional system. The microfacies combination can be classified into “distributary channel area”, “distributary channel and mouth bar mixed zone” and “mouth bars area”. A detailed study of characteristics of the delta front depcsitional facies shows that the abundant sandb（xties can reflect different sedimentary environments. For example, submerged distributary channels are divided into Abandon Type, Integrity Type and Multi-phase Overprint Type, and the mixed-facies com- bination is identified; The mouth bar can be divided into Complete Mouth Bar and Stack-mouth Bar. This paper has also the formation mechanism and the model for distribution of the microfacies combinations of the reservoirs in delta front.

关 键 词：沉积微相 水下分流河道 三角洲前缘 大老爷府油田 松辽盆地 

分 类 号：P618.130.21[天文地球—矿床学]