准噶尔盆地腹部夏盐凸起三工河组成藏模式研究

HYDROCARBON FORMING PATTEN OF SANGONGHE FORMATION IN XIAYAN UPLIFT OF JUNGGAR BASIN

近年来,准噶尔盆地夏盐凸起北部侏罗系三工河组多口井试获工业油流,表明该区良好的油气滚动勘探潜力。运用多条地震剖面、多口井的测井曲线及岩心资料对三工河组的断层特征及沉积储层特征进行综合研究,结合探井、评价井及开发井的试油、试采资料认为:夏盐凸起西部发育一近南北向的低幅度鼻状构造,其核部被近东西向及北东-南西向断裂相互切割,形成多个断块、断鼻构造;沉积微相揭示研究区为河控浅水三角洲前缘亚相沉积;成藏模式主要为"低凸断控聚集"成藏。基于以上认识,总结夏盐凸起的侏罗系油藏主控因素,并为夏盐凸起南部的勘探评价的提供了理论指导。

In recent years,wells in Xiayan located in northern Junggar Basin Jurassic Sangonghe have been tested to industrial oil,which indicated that it has a good hydrocarbon rolling exploration potential.Comprehensive study of log and core datausing multiple seismic profiles,wells on the Sangonghe formation of faults and sedimentary reservoir characteristics,combined with the exploration,appraisal wells and development wells of oil test,production data;It shows that the Xiayan uplift in the West where there is a nearly north-south low amplitude structural nose,developed and the core part is nearly E-W and NE-SW faults cutting each other,forming a plurality of fault block,fault nose structure;sedimentary microfacies study area reveals the fluvial controlled shallow water delta front facies;reservoir model for the main ' low convex fault controlled aggregation' accumulation.Based on the above,the accumulation rule in the Xiayan uplift is summed up,which provides a theoretical guidance for the expluration and evaluation of the southern unlift in Xiayan.