【作者】 张伟；

【导师】 宋维琪； 纪中云；

【作者基本信息】 中国石油大学(华东) ， 地质工程（专业学位）， 2019， 硕士

【摘要】 解构地下岩层岩性、物性和流体的空间变化是油气地球物理研究的目标。一直以来,地震数据的旅行时信息为油区构造解释提供了基础,而利用地震数据的振幅、频率等属性进行岩性和流体解释也在迅速发展中。如何充分挖掘地震资料潜力,降低勘探开发风险成为油气地球物理学家的研究重点和热点。近年来,叠前反演技术得到快速发展和应用。在对具体地区的叠前反演研究中,针对实际地质情况选择合理的反演技术流程,优化反演参数对该区的储层和流体研究至关重要。本文介绍了叠前反演基本理论和方法,并针对巴基斯坦某工区,总结了一套适用于研究区下Goru组的叠前反演的技术系列与流程,包括测井资料标准化处理及解释,研究区岩石物理量板建立,岩石物理建模及测井横波速度预测,AVO模型正演分析,叠前AVO属性分析,叠前同时反演,叠前多属性综合分析等。系统性的考虑地质、测井、地震和反演四大关键要素,建立起该工区多井测井解释标准,岩石物理建模参数,叠前反演参数及误差分析等关键参数,在该区首次开展定量叠前反演工作。本文总结了巴基斯坦某工区的叠前反演成果,期间利用研究成果预测一口在钻井目的层段叠前储层预测和油气检测指示不理想,最终实钻结果验证了该认识。叠前反演结果为之后布井提供了重要参考,取得了很好的效果。更多还原

【Abstract】 Restoring the spatial variations of underground lithology,physical properties and fluids is the ultimate target of petroleum geophysical research.Travel time information of seismic data always provides a basis for structural interpretation in sedimentary basins,furthermore,lithology and fluid interpretations using other seismic data attributes such as amplitude and frequency are developing rapidly.How to fully tap the potential of seismic data and reduce the risk of exploration and development becomes the research focus and hotspot of petroleum geophysicists.In recent years,prestack inversion technology has been rapidly developed and applied.In the study of prestack inversion in specific areas,it is very important to select an optimal inversion flow and optimize inversion parameters for the reservoir and fluid research.This paper introduces basic theories and methods of prestack inversion,and summarizes a technical sequence for seismic reservoir research and fluid detection aiming at lower Goru formation in a Pakistan block,including normalization processing and interpretation of welllog data,establishment of rock physics templates in the study area,rock physics modeling and prediction of shear wave,AVO forward modeling,AVO attributes analysis,pre-stack simultaneous inversion,pre-stack multi-attribute comprehensive analysis,etc.This paper systematically considers the four key factors of geology,logging,seismic and inversion,and establishes key parameters for multi-well interpretation criteria,rock physics modeling,prestack simultaneous inversion,et,al.for the work area,and achieves quantitative reservoir and fluid interpretation in the work area for the first time.In the late stage of the study,the pre-stack inversion results were used for the evaluation of a well being drilled,which showed that the target layers were absent of good reservoir and hydrocarbon indications.Ultimately,the drilling results verified this understanding.The prestack inversion study provides important reference for subsequent exploration in the area,and achieves good results.更多还原