新疆页岩气勘查成效分析与下步勘查方向
Analysis of Shale Gas Exploration Effectiveness and next Exploration Direction in Xinjiang
吴超 1徐仕琪 2黄丹 1梁斌 1敖海超 1杨满仓1
作者信息
- 1. 新疆维吾尔自治区地质局乌鲁木齐地质大队,新疆乌鲁木齐 830000
- 2. 新疆维吾尔自治区地质局乌鲁木齐地质大队,新疆乌鲁木齐 830000;新疆维吾尔自治区地质局,新疆 乌鲁木齐 830000
- 折叠
摘要
结合近年来新疆开展的页岩气调查项目,对准噶尔盆地南缘、新疆北部中小盆地群、塔里木盆地周缘、吐哈盆地等页岩气成藏地质特征进行分析,归纳梳理新疆页岩气成藏地质条件及资源特征,指明下一步页岩气勘查方向.研究认为:新疆页岩气在盆山结合带及盆地深部的富烃层系中均有分布,二叠系、石炭系、侏罗系烃源岩是目前新疆各盆地页岩气勘查的主力层系;新疆页岩气成藏地质条件具烃源岩分布广且厚度大、有机质丰度高、热演化程度适中、构造稳定、盖层发育等特征;沉积相及沉积环境影响烃源岩纵横向分布及变化,构造及保存条件是页岩气能否富集成藏的主要控制因素;以准噶尔盆地南缘、塔里木盆地西南缘山前带为例,初步总结了新疆页岩气成藏模式;指出了页岩气总体勘查方向为北疆地区"深化陆相、加强海相",南疆地区"主攻海相、探索海陆交互相"富烃层系页岩气资源.
Abstract
In combination with the shale gas survey projects carried out in Xinjiang in recent years,this paper analyzes the geological characteristics of shale gas accumulation in the southern margin of Junggar Basin,small and medium-sized basins in northern Xinjiang,the periphery of Tarim Basin,and Tuha Basin,summarizes the geological conditions and resource characteristics of shale gas accumulation in Xinjiang,and points out the direction of shale gas exploration in the next step.Research suggests that shale gas in Xinjiang is distributed in the rich hydrocarbon layers in the basin mountain junction zone and deep basins.Permian,Carboniferous,and Jurassic source rocks are currently the main strata for shale gas exploration in various basins in Xinjiang;The geological conditions for the formation of shale gas reser-voirs in Xinjiang are characterized by a wide distribution and large thickness of source rocks,high organic matter abun-dance,moderate degree of thermal evolution,stable structures,and developed cap rocks;The sedimentary facies and en-vironment affect the longitudinal and transverse distribution and changes of source rocks,and the structural and preserva-tion conditions are the main controlling factors for the enrichment and accumulation of shale gas;Taking the southern margin of the the Junggar Basin and the piedmont belt of the southwestern margin of the Tarim Basin as examples,the shale gas accumulation model in Xinjiang is preliminarily summarized;It is pointed out that the overall exploration direc-tion of shale gas is to"Deepen research on terrestrial shale and strengthen research on marine shale"in the northern Xin-jiang region,and"Mainly studying marine shale and conducting in-depth research on interactive marine and terrestrial deposit shale"which contain hydrocarbon source rocks in the southern Xinjiang region.
关键词
新疆含油气盆地/页岩气/成藏地质条件/成藏模式/勘查方向Key words
Xinjiang oil and gas basin/Shale gas/Geological conditions for reservoir formation/Accumulation mode/Exploration direction引用本文复制引用
出版年
2024
NETL
NSTL
万方数据