玛湖凹陷风城组全油气系统勘探启示  

Exploration Implications of Total Petroleum System in Fengcheng Formation,Mahu Sag,Junggar Basin

作　　者：何文军[1] 钱永新[1] 赵毅[1] 李娜[1] 赵辛楣 刘国良[1] 苗刚[1] HE Wenjun;QIAN Yongxin;ZHAO Yi;LI Na;ZHAO Xinmei;LIU Guoliang;MIAO Gang(Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China)

机构地区：[1]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆石油地质》2021年第6期641-655,共15页Xinjiang Petroleum Geology

基　　金：中国石油科技重大专项(2019E-26)。

摘　　要：准噶尔盆地玛湖凹陷风城组作为国内外全油气系统勘探实例,具有典型代表意义。通过全面回顾风城组油气勘探历程,以油气储量发现与重点突破井为主线,结合勘探思路和理论认识的变化,将勘探历程划分为源外断裂带常规油气勘探、多类型风险勘探和源内全油气系统勘探3大阶段。从风城组全油气系统勘探的过程梳理中,获得诸多启示:风城组发育优质碱湖相烃源岩,也是勘探的重点层系;风城组受陆源碎屑沉积、内源化学沉积以及火山活动的共同作用,形成了砂砾岩—白云质砂岩—白云质泥岩、泥质白云岩有序分布,空间上与常规火山岩、裂缝性储集层共生的特征,构成了全类型储集层;风城组受相序控制,常规油藏-致密油藏-页岩油藏全类型油气藏有序共生。玛湖凹陷风城组全油气系统是全油气系统概念的具象化,实现了理论向实际的转变,丰富和发展了陆相含油气盆地油气系统理论,指导了准噶尔盆地富烃凹陷“下凹”勘探,对中国各大含油气盆地的油气勘探具有重要借鉴意义。As a globally typical total petroleum system,the Fengcheng formation in the Mahu Sag of the Junggar basin has representative significance in terms of exploration.Taking the discovery of oil and gas reserves and key wells as the main line,and considering the im⁃provement on exploration idea and theory,the oil and gas exploration history of the Fengcheng formation is reviewed and then divided into 3 major stages:conventional oil and gas exploration in the fault zone outside the source,multi⁃type risky exploration and inner⁃source total petroleum system exploration.Consequently,many implications have been obtained:the high⁃quality alkaline⁃lacustrine source rock in the Fengcheng formation can be considered as the key target for exploration;under the joint actions of terrigenous clast sedimentation,inner⁃source chemical sedimentation and volcanic activity,the all⁃type reservoirs with a stratigraphic sequence of orderly distributed glutenite-dolomitic sandstone-dolomitic mudstone and argillaceous dolomite are developed in the Fengcheng formation,and the stratigraphic se⁃quence coexists with conventional volcanic rocks and fractured reservoirs;within the Fengcheng formation,controlled by facies sequence,all types of reservoirs including conventional oil reservoir,tight oil reservoir and shale oil reservoir coexist orderly.The total petroleum sys⁃tem in the Fengcheng formation is a typical example in the world.It reflects the concept of a total petroleum system,realizes the transforma⁃tion from theory to practice,enriches and develops the theories of oil and gas systems in continental petroliferous basins,and guides the“in⁃side sag”exploration of the hydrocarbon⁃rich sags in the Junggar basin.The review may be an important reference to oil and gas exploration in other major petroliferous basins in China.

关 键 词：准噶尔盆地 玛湖凹陷 风城组 常规 非常规 全油气系统 碱湖相烃源岩 

分 类 号：TE122[石油与天然气工程—油气勘探]