The impact of 3D tilted resistivity anisotropy on marine CSEM measurements
The impact of 3D tilted resistivity anisotropy on marine CSEM measurements
复制标题
DOI：
10.1190/tle32111374.1
复制
发表时间：
2013-11
期刊：
影响因子：
3.3
通讯作者：
S. Davydycheva;M. Frenkel
中科院分区：
文献类型：
--
作者：
S. Davydycheva;M. Frenkel
目前，勘探开发行业使用的海洋CSEM建模和数据解释算法是基于垂直横向各向同性（VTI）电阻率模型的应用，在许多实际情况下，这种模型不能充分描述复杂的倾斜各向异性地质结构（例如向斜或背斜类型），这是油气聚集的典型特征。VTI模型的使用是CSEM技术的一个严重限制，可能是海洋CSEM调查出现一些假阳性和假阴性结果的核心原因之一。为了更详细地研究这一现象，并评估任意倾斜电阻率各向异性对CSEM数据的影响，我们对一组3D倾斜横向各向同性（TTI）和VTI基准模型进行了模拟。3D建模结果表明，如果忽略TTI效应，可能会导致对潜在CSEM调查可行性的错误评估，以及在解释fi时对油气目标的错误评估和/或定位错误。
Marine CSEM modeling and data-interpretation algorithms currently used by the E&P industry are based on application of vertical transverse isotropic (VTI) resistivity models, which in many practical cases cannot adequately describe complex tilted anisotropic geologic structures typical for accumulation of hydrocarbons (e.g., syncline or anticline types). Use of VTI models is a serious limitation of CSEM technology and might be one of the core reasons for some false-positive and false-negative outcomes of marine CSEM surveys. To investigate this phenomenon in more detail and assess the impact of arbitrary tilted resistivity anisotropy on CSEM data, we performed simulations for a set of 3D tilted transverse isotropic (TTI) and VTI benchmark models. The 3D modeling results show that ignoring the TTI effect, if it is present, might lead to incorrect assessment of the feasibility of a potential CSEM survey as well as erroneous assessments and/or mispositioning of hydrocarbon targets during interpretation of fi...