准西地区侏罗系沉积特征与有利储层分布  

Depositional features and favorable zone of Jurassic in western Junggar basin

作　　者：许涛[1] 张曰静[1] 陈林[1] 程长领[1] 张新见[1] 苏真真[1] 

机构地区：[1]中国石化胜利油田分公司勘探开发研究院西部分院,山东东营257000

出　　处：《东北石油大学学报》2017年第2期13-22,共10页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2011ZX05002-002);中国石油化工股份有限公司项目(P13021)

摘　　要：准噶尔盆地西缘地区侏罗系勘探程度较低,对砂体成因类型及有利储层分布认识不清。在地层精细划分的基础上,根据精细剥蚀量计算结果,恢复侏罗系沉积期古地貌;结合残留地层的沉积特征,研究侏罗系沉积模式,还原重要沉积期的岩相古地理;根据研究区物性统计与物性下限分析结果,明确有利储层砂体成因类型,预测有利储层的展布。结果表明,车排子地区侏罗系发育扇三角洲和辫状河三角洲两种沉积相类型,其中车排子凸起东翼陡坡带发育受限型扇三角洲,四棵树凹陷南部陡坡带发育扇三角洲,四棵树凹陷北部缓坡带发育辫状河三角洲。其中辫状河三角洲前缘砂体储集物性最好,为有效储层,是未来重点勘探目标。The western Junggar basin is one of the most important oil and gas enrichment zones,but the exploration degree of Jurassic is relatively low,the genetic types of sand bodies and the distribution of favorable reservoirs remain unclear.In this paper,based on the division and correlation of strata,combined with erosion quantity calculation,the ancient landscape was restored during the Jurassic period.Further,combined with the sedimentary characteristics of the residual strata,the sedimentary model of the Jurassic was studied,and the lithofacies palaeogeography of important period was reduced.And then through the statistics of physical properties and analysis of the physical property cut-off,the genetic types of sand bodies of favorable reservoir are determined.And the distribution of favorable reservoir is predicted.The results show that fan delta and braided river delta are developed in the Jurassic at Chepaizi area,among which,the restricted type fan delta distributed in the east wing steep slope zone of Chepaizi swell,southern steep slope zone of Sikeshu sag developed fan delta,The braided river delta developed in north slope zone of Sikeshu sag.Among them,the reservoir physical property of braided fluvial river delta front is the best,which is the next important exploration target.

关 键 词：沉积特征 有利储层 侏罗系 岩相古地理 准噶尔盆地西缘 

分 类 号：TE121.3[石油与天然气工程—油气勘探]