鄂尔多斯盆地东南部黄洛区域延长组中下油层组物源分析

发布时间：2018-03-27 23:00

本文选题：轻矿物组合　切入点：重矿物组合　出处：《东北石油大学学报》2017年04期

【摘要】：为查明黄洛区域延长组中下油层组沉积砂体的物源方向,在岩心、野外露头及分析化验资料研究的基础上,分析古水流方向,总结轻、重矿物和岩屑类型的平面展布特征,探讨研究区延长组中下油层组的古水流方向及物源方向。结果表明:鄂尔多斯盆地三叠系延长组中下油层组岩石类型主要为岩屑长石砂岩,其沉积时期古水流以南—北和东南—西北方向为主,轻、重矿物及岩屑分析显示的物源方向一致,即研究区的北部地区,由于地处沉积坳陷中心位置,具有明显的混源区物源特征,整体物源主要来自南部和东北部。该研究对分析研究区的砂体展布规律、有利区判断及下一步勘探开发具有指导意义。
[Abstract]:In order to find out the source direction of sedimentary sand body of middle and lower oil formation of Yanchang formation in Huangluo area, on the basis of core, field outcrop and analysis of laboratory data, the direction of paleocurrent is analyzed, and the plane distribution characteristics of light, heavy mineral and lithic types are summarized. The paleocurrent direction and source direction of the middle and lower reservoirs of the Yanchang formation in the study area are discussed. The results show that the rock types of the middle and lower reservoirs of the Triassic Yanchang formation in Ordos Basin are mainly lithic feldspathic sandstone. In the sedimentary period, the paleocurrent was mainly south to north and southeast to northwest, and the analysis of light, heavy minerals and lithic debris showed the same direction of provenance, that is, the northern area of the study area was located in the center of the sedimentary depression. It has obvious characteristics of mixed source area and the whole source mainly comes from the south and northeast. This study is of guiding significance for analyzing the distribution law of sand body in the study area, judging the favorable area and further exploration and development.
【作者单位】：延长油田股份有限公司勘探部;西南石油大学地球科学与技术学院;西北大学地质学系;陕西延长石油(集团)有限责任公司研究院;
【基金】：延长油田股份有限公司项目(ycsy2014ky-B-09)
【分类号】：P618.13

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