辽河拗陷深层地震采集技术
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摘要
辽河拗陷以往采集的深层地震资料信噪比和分辨率都较低,不能满足辽河油田进一步勘探和开发的需要,为此必须以获得良好的深层资料为目标,努力提高地震资料的信噪比和分辨率。辽河油田分公司选择辽河拗陷东部凹陷欧利坨子北部地区为突破口,通过采用最佳岩性激发、有效弱信号保护、变观测系统、增加覆盖次数等一系列改进措施,进行了系统分析和系列攻关试验,并采集了新的地震资料。可以明显地看出,新资料不仅具有丰富的浅层信息,其深层(3000m以下)及潜山内幕反射也很清晰,分辨能力有明显提高。
The S/N ratio and resolution of former acquired deep seismic data in Liaohe depression were poorer, unable to meet the needs for further exploration and development of Liaohe Oilfield. For that reason, it should take acquirement of good deep data as an object and make our efforts to improve the S/N ratio and resolution of seismic data. Liaohe Oilfield Division first chose north Oulituozi of east sag, Liaohe depression, as breakthrough, conducted a systematic analyses and series of objects-oriented experiments by using a series of new techniques such as shooting in optimum lithology, protection of useful weak signals, geometry-changed design and increasing folds, and acquired new seismic data. It is visibly shown from new acquired data that on the basis of acquiring abundant shallow data, the reflections from deep levels (bellow 3000m) and within the buried hill were clearly visible and resolution was greatly improved.
The S/N ratio and resolution of former acquired deep seismic data in Liaohe depression were poorer, unable to meet the needs for further exploration and development of Liaohe Oilfield. For that reason, it should take acquirement of good deep data as an object and make our efforts to improve the S/N ratio and resolution of seismic data. Liaohe Oilfield Division first chose north Oulituozi of east sag, Liaohe depression, as breakthrough, conducted a systematic analyses and series of objects-oriented experiments by using a series of new techniques such as shooting in optimum lithology, protection of useful weak signals, geometry-changed design and increasing folds, and acquired new seismic data. It is visibly shown from new acquired data that on the basis of acquiring abundant shallow data, the reflections from deep levels (bellow 3000m) and within the buried hill were clearly visible and resolution was greatly improved.
引文
[1]陆基孟主编．地震勘探原理．山东东营:石油大学出版社,1993
[2]马在田．三维地震勘探方法．北京:石油工业出版社, 1992
[3]李庆忠．走向精确勘探的道路——高分辨地震勘探系统工程剖析．北京:石油工业出版社,1993
[4]俞寿朋．高分辨率地震勘探．北京:石油工业出版社, 1993
[5]郭东润．地震资料采集中的若干问题．中石化物探技术座谈会论文集,2002
[2]马在田．三维地震勘探方法．北京:石油工业出版社, 1992
[3]李庆忠．走向精确勘探的道路——高分辨地震勘探系统工程剖析．北京:石油工业出版社,1993
[4]俞寿朋．高分辨率地震勘探．北京:石油工业出版社, 1993
[5]郭东润．地震资料采集中的若干问题．中石化物探技术座谈会论文集,2002
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