三江盆地绥滨坳陷下白垩统城子河-穆棱组沉积特征  

Lower cretaceoussedimentary characteristics of Suibin depression Chengzihe-Muling formation in Sanjiang basin

作　　者：徐英[1] 陈孔全[2] 

机构地区：[1]长江大学地球科学学院 [2]长江大学非常规油气湖北省协同创新中心,湖北武汉430100

出　　处：《内蒙古石油化工》2016年第5期153-156,共4页Inner Mongolia Petrochemical Industry

摘　　要：三江盆地绥滨坳陷普遍发育泥页岩,且沉积厚度较大,下白垩统城子河组-穆棱组是主要的页岩气储层发育层段。本文综合应用钻井、岩心、露头等数据并结合三江盆地区域地质背景及前人研究相关成果,对该地区城子河组及穆棱组沉积特征进行系统的分析。研究表明:绥滨坳陷城子河-穆棱组主要为一套三角洲-湖泊相的沉积地层,城子河组沉积期主要为滨浅湖的沉积环境,三角洲沉积较少发育,仅出现于坳陷的西部及东北部地区,进入穆棱组沉积期后,水体较城子河组明显加深,半深湖沉积相范围明显扩大,三角洲沉积逐渐萎缩。通过对区内城子河组及穆棱组沉积特征的对比分析研究初步确定了页岩气勘探的有利目标区域。There are a number of shale in the Suibindepression of Sanjiangbasin,and the shale has large depositional thickness.Lower cretaceousChengzihe-Muling formation is the main growth layer of shale gasreservoir.Based on the regional geological background of Sanjiang basin and related previous research results,this paper makes a system analysis on sedimentary characteristics of Chengziheformation and Muling formationin this area with the integrated applicationof drilling data,core profile and field outcropsand the like.The results show thatSuibin depression Chengzihe-Muling formation mainly is a set of sedimentary strata of delta-lacustrine facies.Moreover,there is a kind ofsedimentary environmentCharacterized byshore-shallow lacustrine in the sedimentary period of Chengzihe formation.Delta sedimentary were less developed in Suibin depression and only distributed in western and northeastern region of the depression;after entering intothe sedimentary period of Muling formation,with the obvious increasing ofwater-depth,the range of semi-deep lake facies has significantly expandedand delta sedimentary has graduallyfaded.By the comparative analysis of sedimentary characteristics of Chengziheformation and Muling formation,this study can initially define the favorabletarget area of shale gas exploration in this area.

关 键 词：绥滨坳陷城子河组穆棱组 沉积特征 页岩气勘探 

分 类 号：P618.13[天文地球—矿床学]