下扬子盆地黄桥地区三维地震采集技术与效果
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摘要
下扬子盆地黄桥地区具有良好的生、储、盖组合条件,是下扬子地区海相中、古生界油气勘探最有利的区块之一。但是由于流沙发育区地震波吸收衰减严重,地震地质条件复杂,以往二维地震资料信噪比、分辨率低,已远远不能满足精细勘探的要求,一定程度上制约了油气勘探的进展。针对以上问题,2011年在黄桥地区进行了三维地震资料采集方法攻关,摸索了一套适合该区特点的地震采集方法及技术,如观测系统优化、激发技术研究、流沙层钻井工艺、黄桥地区炸药震源与可控震源联合施工、质量控制技术等,这些技术的应用使资料品质有了明显提高,取得了较好的地质效果。
With good source-reservoir-seal combination conditions,Huangqiao area is one of the most favorable blocks for marine mesozoic-paleozoic petroleum exploration in lower Yangtze basin.However,for the reasons that the absorption attenuation of seismic wave caused by quicksand is serious,geological conditions are complex,and SNR and longitudinal/lateral resolution of previous 2D seismic data are low,it can not meet the needs for fine exploration any more.As a result,it restricts the development of petroleum exploration.For these problems above,3D seismic data acquisition method research was implemented in Huangqiao area in 2011.A series of seismic data collection method and technology suitable for this area was found out.such as observation system optimization,stimulate technology research,drilling technology in quicksand layer,joint construction of explosive source and vibrose in Huangqiao area,and quality control technology.The application of the technology improved the material quality obviously and achieved good geological effect.
With good source-reservoir-seal combination conditions,Huangqiao area is one of the most favorable blocks for marine mesozoic-paleozoic petroleum exploration in lower Yangtze basin.However,for the reasons that the absorption attenuation of seismic wave caused by quicksand is serious,geological conditions are complex,and SNR and longitudinal/lateral resolution of previous 2D seismic data are low,it can not meet the needs for fine exploration any more.As a result,it restricts the development of petroleum exploration.For these problems above,3D seismic data acquisition method research was implemented in Huangqiao area in 2011.A series of seismic data collection method and technology suitable for this area was found out.such as observation system optimization,stimulate technology research,drilling technology in quicksand layer,joint construction of explosive source and vibrose in Huangqiao area,and quality control technology.The application of the technology improved the material quality obviously and achieved good geological effect.
引文
[1]陈沪生,渠洁瑜.下扬子及邻区岩石圈结构构造特征及油气资源评价[M].北京:地质出版社,1999.
[2]梁运基,李桂林.陆上高分辨率地震勘探检波器性能及参数选择分析[J].石油物探,2005,44(6):641-644.
[3]苏丕波,雷怀彦,杨继友.基于地球物理模型正演的三维观测系统设计优化[J].新疆石油地质,2009,30(5):579-581.
[4]石一青,朱峰,苪建民,等.三维波动方程正演技术在地震采集施工方法设计优化中的应用[J].石油天然气学报,2011,33 (6):199-203.
[5]胡立新,刘怀山,张进.东营城区高精度三维地震采集方法研究[J].中国海洋大学学报,2004,34(6):1075-1080.
[2]梁运基,李桂林.陆上高分辨率地震勘探检波器性能及参数选择分析[J].石油物探,2005,44(6):641-644.
[3]苏丕波,雷怀彦,杨继友.基于地球物理模型正演的三维观测系统设计优化[J].新疆石油地质,2009,30(5):579-581.
[4]石一青,朱峰,苪建民,等.三维波动方程正演技术在地震采集施工方法设计优化中的应用[J].石油天然气学报,2011,33 (6):199-203.
[5]胡立新,刘怀山,张进.东营城区高精度三维地震采集方法研究[J].中国海洋大学学报,2004,34(6):1075-1080.
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