摘要
针对准噶尔盆地西缘车排子斜坡带高精度三维地震处理很难兼顾到不同层系的砂体分辨精度的情况,在油气藏和砂体描述中,对三维地震资料进行特殊目标处理,实现了砂体展布规律的精准刻画。综合研究认为,该地区的勘探工作是准噶尔盆地西缘红车断裂带勘探的继续和延伸,其油源来自昌吉凹陷、玛湖凹陷和四棵树凹陷,以昌吉凹陷为主;含油层系为上第三系、白垩系和石炭系,目前以上第三系沙湾组为主,同时白垩系和石炭系还处于勘探的初期阶段,资源潜力很大;有利圈闭为岩性圈闭,主要是扇三角洲、滩坝砂体和辫状河三角洲;不整合面、油源断裂和厚砂体组成了高效的复式输导体系。在三维地震精细解释基础上,利用HDNS技术(水平井、降黏剂、氮气辅助蒸汽吞吐)使该地区勘探获得突破。发现了春光油田和春风油田,已探明石油地质储量为7 128×104t,已建成年产油能力110×104t/a。
3D seismic data of Chepaizi slope zone in western Junggar Basin has been processed in accordance with special targets to precisely delineate sands distribution.The research revealed that the exploration in this area is carried out along the extension of Hongche fault zone in the west margin of Junggar Basin.The oil source came from Changji sag,Mahu sag and Sikeshu sag,with Changji sag being the dominant.Oil-bearing series include Neogene,Cretaceous and Carboniferous.At present,the Neogene Shawan formation is the major one,while Cretaceous and Carboniferous are still at early exploration stage and have big potential.Favorable traps are lithologic traps mostly in fan delta,point bar sands and braided river delta.Unconformity,oil source fault and thick sands had constituted an efficient compound migration pathway system.Oil exploration breakthrough has been made in this area based on 3D seismic fine interpretation and using HDNS technology(horizontal well,dissolver,nitrogen and steam stimulation),thus discovered Chunguang Oilfield and Chunfeng Oilfield with proved OOIP of 7 128×10 4 t and annual production capacity of 110×10 4 t.
出处
《特种油气藏》
CAS
CSCD
北大核心
2013年第2期20-24,151,共5页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"准噶尔盆地碎屑岩层系大中型油气田形成规律与勘探方向"(2011ZX05002-002)
中国石化股份有限公司科技攻关项目"准噶尔盆地腹部及西缘地区圈闭识别与成藏模式研究"(P03011)
胜利油田科技项目"准噶尔盆地西缘油气成藏规律及勘探目标研究"(YKK0808)
关键词
岩性油藏
车排子斜坡带
高效勘探
三维地震
地震资料特殊处理
lithologic reservoir
efficient exploration
3D seismic
special processing of seismic data
Chepaizi slope zone
Junggar Basin
