综合应用井间地震等多种资料确定精细地质模型

The construction of a fine geological model by comprehensive application of crosshole seismic data and other data

地矿部石油物探研究所, 南京210014

Research Institute of Gcophysical Prospecting for Petroleum, Nanjing 210014

井间地震资料有着比地面地震资料更高的分辨率和更为丰富的波场信息。通过对吉林地区野外井间地震资料的处理, 我们得到了精确的井间物性参数及高分辨率的地下构造剖面。从我们得到的结果可以看出, 层析速度可以分辨出十米左右的速度层, 而其主要的速度界面与地面资料、VSP资料及测井资料等具有很好的一致性。井间地震资料的反射波偏移剖面可以分辨出四米左右的薄层。文中还对比了多种资料的分辨能力。通过综合应用井间地震、地面三维、VSP、测井及岩性柱状剖面等资料, 较好地解决了W1井和W2井两井间地层对比、小层岩性和厚度变化、主要储层横向变化及推断储层的连通性等问题, 并解释出了精细的岩性地质模型。

Crosshole seismic data is ptovided with higher resolution and more plentiful information as compared with surface seismic data. After a series of processing operations,we have got precise crosshole physical parameters and high rcsolution seismic structure profiles. The results show that velocity layets of about ten metcrs can be distinguished from tomographic velocity image and the main velocity interfaces of the image coincide with those in surface seismic data,VSP data and well logging data,and the migration image of refiected crosshole seismic data can reach a resolution of thin layers with four meters. The resolving powet of different types of data were also discussed. By a comprehcnsive application of crosshole seismic data, surface 3D seismic data, VSP data, welll logging data and lithological geological column,we have successfully carried out the comparison of layers,and thc study of variations of lithology and thickness of thin layers and lateral changes of main reservoir layers,and the judgement of continuity of reservoir between well W1 and well W2,and finally, we constructed a fine lithological geological model.