Using slowness and azimuth fluctuations as new observables for four‐dimensional reservoir seismic monitoring
Using slowness and azimuth fluctuations as new observables for four‐dimensional reservoir seismic monitoring
复制标题
利用慢度和方位波动作为四维油藏地震监测的新观测值
DOI：
10.1111/1365-2478.12338
复制
发表时间：
2016
影响因子：
2.6
通讯作者：
M. Campillo
中科院分区：
文献类型：
--
作者：
B. Cacqueray;P. Roux;M. Campillo
使用地球物理数据的四维成像在石油和天然气工业中越来越受关注。虽然旅行时间和振幅变化通常用于监测深部储层性质，但由于缺乏信息来解释不同参数所起的作用，因此对其解释可能会受到影响。在这种情况下，本研究的重点是在表面测量的慢度和方位角使用源和接收器阵列作为互补的可观测量。在第一步中，使用阵列处理技术来提取在源侧（离开角）和在接收器侧（到达角）的方位角和入射角。在第二步中，在实验室环境中监测慢度和角度变化。当传播介质受到温度波动的影响时，这些新的观测量与传统的到达时间变化进行了比较。最后，研究了来自安装在陆地上并面临蒸汽注入和温度变化的重油永久油藏监测系统的现场数据。计算了152天内的慢度变化。与费马原理一致，慢度和到达时间变化之间的强相关性被强调，以及与其他技术和现场压力测量的良好一致性。虽然慢度和到达时间的时间变化显示出相同的特征，但仍存在差异，可以考虑进一步表征深度处的物理变化。
Four‐dimensional imaging using geophysical data is of increasing interest in the oil and gas industries. While travel‐time and amplitude variations are commonly used to monitor reservoir properties at depth, their interpretation can suffer from a lack of information to decipher the parts played by different parameters. In this context, this study focuses on the slowness and azimuth angle measured at the surface using source and receiver arrays as complementary observables. In the first step, array processing techniques are used to extract both azimuth and incidence angles at the source side (departure angles) and at the receiver side (arrival angles). In the second step, the slowness and angle variations are monitored in a laboratory environment. These new observables are compared with traditional arrival‐time variations when the propagation medium is subject to temperature fluctuations. Finally, field data from a heavy‐oil permanent reservoir monitoring system installed onshore and facing steam injection and temperature variations are investigated. The slowness variations are computed over a period of 152 days. In agreement with Fermat's principle, strong correlations between the slowness and arrival‐time variations are highlighted, as well as good consistency with other techniques and field pressure measurements. Although the temporal variations of slowness and arrival time show the same features, there are still differences that can be considered for further characterization of the physical changes at depth.