第聂伯-顿涅茨盆地致密气储层特征的地球物理分析

R. Valiakhmetov, A. Murineddu, M. Zhiyenkulov, Viktor Maliar, V. Bugriy, G. Kashuba, V. Loktiev, P. Kuzmenko, F. Gerecitano, A. Romi, Carlo D'Aguanno
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引用次数: 0

摘要

这项工作的目的是描述一种综合方法,将地震数据处理和电缆测井集相结合,用于第聂伯-顿涅茨盆地一个致密气区的储层表征。本文拟从地震数据处理的角度讨论一个案例,将地震属性与测井资料中的地层属性结合起来,在地胞模型中进行甜点选择和风险分析。项目期间的工作流程包括以下步骤。地震数据三维处理,包括5D插值和PSTM偏移。4口勘探评价井有限测井资料解释地震解释和反演。构建领域的静态模型。钻井位置建议。对钻井进行评估,以验证初始模型的输入参数。静态模型整合了所有可用的地下数据,并使用了根据可用测井曲线校准的倒立地震属性来约束属性建模。然后采用各种确定性和随机方法进行相建模和估算天然气在地体积。整合所有可用数据可以更好地了解储层分布,并为钻井位置提供建议。结合地胞模型、地震属性和地震反演结果,钻了一口勘探井。在最近钻探的井中获得的现代岩石物理测井资料强化了先验知识,并提供了致密气藏的可靠图像。钻井的结果与预测的地层性质非常吻合,这增加了对本研究和随后类似研究中应用的技术方法的信心。对于拥有巨大致密气潜力的第聂伯-顿涅茨克盆地来说,这是一个岔路口,激发了对其他前景和区块的勘探。分析方法与地震处理、地质建模和储层表征方法相结合,可以准确选择钻井目标,同时将“干井”的风险降至最低,这一点已被一口新探井的成功钻探结果所证明。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Geophysical Aspects of Reservoir Characterization of Tight Gas Play in the Dnieper-Donets Basin
The objective of this work is to describe a comprehensive approach integrating seismic data processing and sets of wireline logs for reservoir characterization of one of the tight gas plays of the Dnieper-Donets basin. This paper intends to discuss a case study from seismic data processing, integrating seismic attributes with formation properties from logs in a geocellular model for sweet spot selection and risk analysis. The workflow during the project included the following steps.Seismic data 3D processing, including 5D interpolation and PSTM migration.Interpretation of limited log data from 4 exploration and appraisal wells.Seismic interpretation and inversion.Building a static model of the field.Recommendations for drilling locations.Evaluation of the drilled well to verify input parameters of the initial model. The static model integrated all available subsurface data and used inverted seismic attributes calibrated to the available logs to constrain the property modelling. Then various deterministic and stochastic approaches were used for facies modeling and estimation of gas-in-place volume. Integrating all the available data provides insights for better understating the reservoir distribution and provided recommendations for drilling locations. Based on the combination of the geocellular model, seismic attributes and seismic inversion results, the operator drilled an exploration well. The modern set of petrophysical logs acquired in the recently drilled well enforced prior knowledge and delivered a robust picture of the tight gas reservoir. The results from the drilled well matched predicted formation properties very closely, which added confidence in the technical approach applied in this study and similar studies that followed later. It is the fork in the road moment for the Dnieper-Donetsk basin with huge tight gas potential in the region that inspires for exploration of other prospects and plays. A synergy of analytical methods with a combination of seismic processing, geomodeling, and reservoir characterization approaches allowed accurate selection of the drilling targets with minimum risk of "dry hole" that has been vindicated by successful drilling outcome in a new exploration well.
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