摘要
近年来,在准噶尔盆地西北缘克-百断裂带石炭系内幕钻探的探井、评价井试油获高产油流,显示了巨大的勘探潜力。断裂带石炭系逆冲推覆于二叠系、三叠系及侏罗系地层之上,受长期挤、压、扭、转应力作用,石炭系内幕地层沿低密度塑性地层易于应力释放,形成背斜、向斜及断背斜。研究区由南至北由叠瓦构造向反冲构造演变,中部叠瓦构造加反冲构造,北部反冲构造加逆冲岩席;石炭系内幕发育爆发相凝灰岩,其次为溢流相玄武岩、安山岩,试油结果表明,各种岩性均含油,含油性主要取决于岩石物性和裂缝发育程度。断裂发育部位也是各种微裂缝发育的部位,油气沿深大断裂及伴生次级断裂富集,将是该区石炭系内幕下步勘探有利区。
In recent years,high-yield oil flow has been produced in exploration wells and evaluation wells drilled in carboniferous system of Ke—Bai fault zone in the northwest margin of Junggar Basin,which shows great exploration potential.The carboniferous thrust of the fault zone is over the Permian,Triassic and Jurassic strata.Under the action of long-term compressive,torsional and rotational stress,the carboniferous inner strata are easy to release stress along the low-density plastic strata,forming anticlines,synclines and faulted anticlines.The work area evolves from imbricate structure to recoil structure from south to north,with imbricate and recoil in the middle and thrust rock mat in the north;explosive tuff is developed in carboniferous system,followed by overflow basalt and andesite.The oil test results show that all kinds of lithology contain oil,and the oil content is mainly related to petrophysical properties and the occurrence degree of fractures.The fracture development position is also the development position of various micro-fractures.The enrichment of oil and gas along deep and large faults and associated secondary faults will be the favorable exploration area for carboniferous system in this area.
作者
邱争科
李婷
杨兴
胡宗芳
胡戈玲
QIU Zhengke;LI Ting;YANG Xing;HU Zongfang;HU Geling(No.2 Oil Production Plant,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China;No.1 Gas Production Plant,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China)
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第5期39-47,共9页
Journal of Southwest Petroleum University(Science & Technology Edition)
关键词
准噶尔盆地
石炭系内幕
背斜
向斜
爆发相
溢流相
Junggar Basin
Carboniferous internal
anticline
syncline
overflow phase
explosive phase
