准噶尔盆地东部二叠系富烃凹陷全油气系统勘探前景  

Exploration prospects of the whole oil and gas system in the Permian hydrocarbon depressions in the Eastern Junggar Basin

作　　者：支东明 谢安 杨帆[2] 马强 何昌松 苟红光 ZHI Dongming;XIE An;YANG Fan;MA Qiang;HE Changsong;GOU Hongguang(Xinjiang Research Institute of Huairou Laboratory,Urumqi 830000,Xinjiang,China;Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China;Tuha Oilfield Company,PetroChina,Hami 839009,Xinjiang,China)

机构地区：[1]怀柔实验室新疆研究院,新疆乌鲁木齐830000 [2]中国石油勘探开发研究院,北京100083 [3]中国石油吐哈油田公司,新疆哈密839009

出　　处：《地质力学学报》2024年第5期781-794,共14页Journal of Geomechanics

基　　金：新疆维吾尔自治区“天山英才”科技创新领军人才支持项目(2022TSYCLJ0070)。

摘　　要：准噶尔盆地东部地区包含多个残余富烃凹陷,其中吉木萨尔凹陷自斜坡区到凹陷区发现了常规油、致密油、页岩油等多类型油藏,展现出常规-非常规有序共生、全油气系统成藏的特点。为了探索准东地区其他富烃凹陷油气成藏规律和勘探潜力,对二叠系烃源岩开展系统评价、沉积相研究、储层特征分析和油气成藏研究。结果表明:准东地区中二叠统发育咸水湖相优质烃源岩,吉南、吉木萨尔、石树沟三个凹陷烃源岩规模大、品质最好,已达到成熟演化阶段;二叠系富烃凹陷周缘的继承性古隆起长期提供物源,凹陷区发育扇三角洲、辫状河三角洲、咸化湖沉积,有序形成砂砾岩、云质砂岩、云质泥岩等,具有全粒序成储特点;从盆缘到凹陷区发育构造岩性常规油气藏、致密油气和页岩油气聚集,具有全类型成藏、全油气系统发育模式。根据成藏综合评价和勘探程度优选有利区带,在全油气系统成藏模式指导下,优选石树沟凹陷南斜坡、吉南凹陷芦草沟组作为准东地区未来探索的重要勘探区带。[Objective]Multiple types of oil reservoirs,including conventional oil,tight oil,and shale oil,have been discovered from the slope area to the depression area in the Jimusaer Depression,demonstrating the characteristics of conventional–unconventional ordered coexistence and complete oil and gas system accumulation.[Methods]Source rocks,sedimentary reservoirs,and reservoir formation were examined to explore the rules of oil and gas accumulation in hydrocarbon-rich depressions in the Eastern Junggar.[Results]High-quality,saline,lacustrine facies source rocks are believed to be developed in the Middle Permian of the Eastern Junggar.The source rocks in the Jinan,Jimusaer,and Shishugou Depressions have large scale and best quality and have reached the mature stage of evolution.The inherited ancient uplifts around the Permian hydrocarbon-rich depression provided long-term material sources,with the development of fan deltas,braided river deltas,and saline lake sediments,forming sandy conglomerates,cloudy sandstones,cloudy mudstones,etc.,in an orderly manner and demonstrating the characteristics of grain sequence reservoir formation.Conventional oil and gas,tight oil and gas,and shale oil and gas accumulations,demonstrating a complete type of reservoir formation and complete oil and gas system development pattern,are developed from the edge of the basin to the depression area.[Conclusions]The depressions in the Eastern Junggar Basin show a whole oil and gas system pattern.[Significance]Under the guidance of the entire oil and gas system reservoir formation model,the southern slope of the Shishugou Sag and the Lucaogou Formation of the Jinan Sag were selected as important exploration zones for future exploration in the Eastern Junggar.

关 键 词：全油气系统 咸化湖盆 吉木萨尔凹陷 石树沟凹陷 吉南凹陷 准噶尔盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]