摘要
齐古背斜位于北天山山前南缘第一排构造带上,油气富集。工区内河流冲积扇体发育,沟壑纵横,表层速度结构复杂,难以准确建立近地表速度模型,影响地震成像。通过微测井约束的层析反演方法建立近地表速度模型,据表层结构调查、齐古背斜地质图、卫星照片对模型进行对比分析,同时结合层析反演严格的质控手段,对模型进行综合约束,经多次迭代得到合理的近地表速度模型,以此为基础计算静校正量并应用于地震数据处理中,通过叠加剖面检查进一步验证近地表模型的准确性。
Qigu anticline is located in the first row of tectonic belt with rich oil-gas resource at south Junggar basin of north Tiansan mountain front.In the survey,rivers and alluvial fans develop,gully freely,so near surface velocity structure is very complicated.It is difficult to get an accurate near surface velocity model,which affects seismic imaging.By using micro-logging constrained tomography inversion and applying comprehensive constraint with near surface investigation data,Qigu anticline geological map,satellite picture,and strict quality control methods of tomography inversion,accurate near surface velocity model is built after numbers of iteration.After statics,computed from the near surface structure model,is applied in seismic processing,seismic stack section proves near surface velocity model accurate and reasonable.
作者
姜涛
程志国
魏凌云
卞龙
王晓涛
Jiang Tao;Cheng Zhiguo;Wei Linyun;Bian Long;Wang Xiaotao(GRI,Exploration and Production Research Academe,Xinjiang Oilfield Company,Urumqi,Xinjiang,830013,China)
出处
《新疆地质》
CAS
CSCD
北大核心
2019年第4期532-535,共4页
Xinjiang Geology
基金
国家科技重大专项准噶尔前陆冲断带油气成藏、关键勘探技术与新领域目标优选(2016ZX05003-005)共同资助
关键词
准噶尔南缘
齐古背斜
近地表速度建模
综合约束
South Junggar
Qigu anticline
Near surface velocity modeling
Comprehensive constraint
