标题:
基于Xu-White模型的横波计算在厄瓜多尔18区块的应用The Application of Shear-Wave Calculation in Xu-White Model in Block 18 of Ecuador
作者:
苑坤, 方欣欣, 闻涛, 杨飞
关键字:
Xu-White模型, 横波计算, 弹性参数, 厄瓜多尔Xu-White Model, S-Wave Velocity Calculation, Elastic Parameters, Ecuador
期刊名称:
《Journal of Oil and Gas Technology》, Vol.39 No.1, 2017-02-23
摘要:
叠前弹性阻抗反演中，除需要纵波时差、密度测井资料外，还需要用到可靠的横波时差。由于横波测井采集成本较高，在实际生产中测量较少，且部分实测横波受环境影响后对流体性质(含油气性)的反映并不理想。因此，为得到能够准确反映岩性及含油气性的弹性参数，利用纵波时差及其他测井资料处理成果，使用基于Xu-White模型改进的方法计算横波，并应用于叠前弹性阻抗反演，以预测岩性发育及流体分布情况。以厄瓜多尔18区块为例，应用上述方法计算横波曲线，实现了在强非均质性砂体中的流体预测，且根据预测结果所设计的井位获得了高产工业油流。
In the pre-stack elastic impedance inversion technology, in addition to the need for longitudinal wave transit time, density logging data, accurate S-wave velocity data were also needed. However, the cost of shear wave logging collection was higher, and it was less used for measurement in actual production, and sometimes the S-wave logs were usually not accurate enough to reflect the fluid properties (containing oil and gas) after the measured S-wave was influenced by environment. Therefore, to obtain elastic parameters that could reflect accurately the lithology and property of oil and gas containing, the processing result of longitudinal wave transit time and other logging data was used to obtain the shear-wave by using the improved method based on Xu-white Model, the obtained shear wave was used for pre-stack elastic impedance reversion and predicting the lithologic development and fluid distribution. By Block 18 in Ecuador for example, the above method is used for calculation S-wave curve for the implementation of fluid prediction in the sand bodies with strong heterogeneity, and high industrial oil flow is obtained in the well locations designed with the predicted results.