三维AVO解释技术在洪泽地区岩性油藏勘探中的应用(英文)

洪泽地区由于沉积的特点,储层横向变化快,油藏受构造、岩性、油源多因素控制。在对该区三维AVO属性体解释中,利用多元回归方法求取了横波曲线,分岩性和含油气性统计了纵、横渡、泊松比参数分布规律,建立了本区的含油砂岩的正演模型,从而降低了AVO解释的多解性。通过井-震结合对四种AVO属性数据体进行了标定,并确定了各属性体应用范围,进而进行了储层和含油气检测。实践表明,该方法能有效地利用AVO属性数据体进行储层预测及油气检测,具有一定的推广价值。

AVO技术研究及应用进展

文章对AVO技术的研究及应用进展作了概述 ,并且重点阐述了AVO处理和分析及其在检测裂缝中的应用。结合国内外勘探实践 ,探讨了胜利油区永安镇地区三维AVO分析方法 ,综合应用三维波阻抗成果确定油气水界面 ,取得了较好的效果。文后指出了AVO技术的发展趋势。

3D AVO Analysis for Identifying Thin Continental Sandstone Interbeds and Deep Volcanic Rocks

AVO characteristics were ambiguous in thin-layer interbed sandstones and mudstones of terrestrial facies of Daqing area. Described in this paper is the 3D AVO analysis and real examples in the Songzhan region in the north of the Songliao basin. The AVO responses of the Fuyu sandstone reservoir, obtained through special AVO processing and interpretation as well as the AVO forwardmod eling under the constraints of logging data, were evident in the Sheng-81 well. It was concluded that the Fuyu sandstone reservoir presented an AVO anomaly of “amplitudes increasing with offsets”.At the same time, the deep volcanic reservoirs were ascertained and the channels of volcanic eruption were delineated at the intersections of faults in Sanzhao area, through a 3D AVO analysis, which coincided with the theory of geodynamics and tectonophysics.

DF气田开发方案调整的地球物理对策

DF气田原开发方案是在二维地震资料研究成果的基础上制定的。针对原开发方案中存在的问题,依据三维地震资料,在对该气田开发方案进行调整中采取了相应的地球物理对策应用方差体技术对断层分布进行了全三维解释;应用波阻抗反演技术对含气砂体分布进行了精细描述;利用三维相对波阻抗体,对储层物性的横向非均质性进行了分析,并确定了气水边界;应用叠前层速度相干反演技术及射线追踪方法进行了气层顶底层位的时深转换;应用三维AVO反演技术对含气范围及其内部含气性变化做了进一步预测。依据三维地震资料研究成果并按照气田开发方案的调整原则,已顺利实现了DF气田开发井井位调整和井轨迹优化。已调整开发井的钻探结果证实了采取上述地球物理对策所获得的认识。