准噶尔盆地环玛湖地区三叠系百口泉组物源分析

发布时间：2018-04-26 13:47

本文选题：物源分析 + 重矿物　；参考：《沉积学报》2016年05期

【摘要】：通过对百口泉组重矿物特征研究、古流向分析、砾石成分特征研究及地层含砂率特征研究,讨论了环玛湖地区百口泉组沉积时期的物源方面和母岩性质。采用重矿物Q型聚类分析,结合重矿物ZTR等值线图以及地层倾角测井古流向分析,指出环玛湖地区百口泉组存在3大物源体系,分别为北部夏子街物源、西部黄羊泉物源以及东部夏盐物源;通过砾岩成分以及重矿物组合类型研究,认为北部物源和西部物源成分存在差异:北部夏子街物源及夏盐物源成分以凝灰岩和中酸性火山喷出岩为主;西部黄羊泉物源成分以凝灰岩、沉积岩和花岗岩为主。西部物源中花岗岩岩屑含量较高,致使储层刚性颗粒含量高、抗压实能力强,这是西部扇体储层物性普遍优于北部扇体储层物性的原因之一。各物源方向及物源体系与扇三角洲的推进方向具有较好的一致性,因此,利用多种方法结合来划分环玛湖地区百口泉组沉积时期物源是十分有效的。
[Abstract]:Based on the study of heavy mineral characteristics, paleo-direction analysis, gravel composition characteristics and sand content characteristics of the Baikouquan formation, the provenance and parent rock properties of the Baikouquan formation in Huanmahu area were discussed. Using Q cluster analysis of heavy minerals, ZTR isoline map of heavy minerals and paleo-direction analysis of formation dip logging, it is pointed out that there are three major source systems in Baikouquan formation in Huanmahu area, respectively, which belong to Xiazijie in the northern part of China. Western Huangyangquan provenance and eastern summer salt source; study on conglomerate composition and heavy mineral assemblage type, It is considered that there are differences between the northern and western provenances: the northern Xiazijie provenance and the summer salt source are mainly tuff and intermediate-acid volcanic exhalation, and the western Huangyangquan provenance is mainly tuff, sedimentary rock and granite. The high content of granite debris in the western provenance leads to the high content of rigid particles and strong compaction ability of the reservoir, which is one of the reasons why the physical properties of the western fan reservoir are generally superior to those of the northern fan reservoir. Each source direction and provenance system are in good agreement with the propulsion direction of fan delta. Therefore, it is very effective to divide the provenance of Baikouquan formation in Baikouquan formation around Mahu area by various methods.
【作者单位】：中国石油杭州地质研究院;中国石油新疆油田分公司勘探开发研究院;
【基金】：国家重点基础研究发展规划(973计划)项目(2014CB239002) 中国石油股份有限公司科技专项(ZX2012E-34-01)~~
【分类号】：P618.13

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