The application of quantitative interpretation techniques for hydrocarbon prospect evaluation from seismic has become so vital. The effective employment of these techniques is dependent on several factors: the quality of the seismic and well data, sparseness of data, the physics of rock, lithological and structural complexity of the field. This study adopts reflection pattern, amplitude versus offset (AVO), Biot–Gassmann fluid substitution and cross-plot models to understand the physics of the reservoir rocks in the field by examining the sensitivity of the basic rock properties; P-wave velocity, S-wave velocity and density, to variation in lithology and fluid types in the pore spaces of reservoirs. This is to ascertain the applicability of quantitative seismic interpretation techniques to explore hydrocarbon prospect in the studied field. The results of reflection pattern and AVO models revealed that the depth of interest is dominated by Class IV AVO sands with a high negative zero offset reflectivity that reduces with offset. The AVO intercept versus gradient plot indicated that both brine and hydrocarbon bearing sands can be discriminated on seismic. Fluid substitution modelling results revealed that the rock properties will favourably respond to variation in oil saturation, but as little as 5% gas presence will result in huge change in the rock properties, which will remain constant upon further increments of gas saturation, thereby making it difficult to differentiate between economical and sub-economical saturations of gas on seismic data. Rock physics cross-plot models revealed separate cluster points typical of shale presence, brine sands and hydrocarbon bearing sands. Thus, the response of the rock properties to the modelling processes adopted favours the application of quantitative interpretation techniques to evaluate hydrocarbon in the field.

定量解释技术在地震油气勘探中的应用已变得至关重要。这些技术的有效使用取决于几个因素：地震和井数据的质量，数据的稀疏性，岩石的物理特性，油田的岩性和结构复杂性。这项研究采用反射模式，振幅与偏移量（AVO），Biot–Gassmann流体替换和交叉绘图模型，通过检查基本岩石属性的敏感性来了解油田储层岩石的物理性质；P波速度，S波速度和密度，以改变储层孔隙空间中的岩性和流体类型。这是为了确定定量地震解释技术在研究领域中勘探油气前景的适用性。反射模式和AVO模型的结果表明，感兴趣的深度主要是IV级AVO砂，该砂具有较高的负零偏移反射率，并随偏移而减小。AVO截距与梯度图表明，在地震作用下可以区分盐水和含烃砂。流体代换模型的结果表明，岩石特性将对含油饱和度的变化有很好的响应，但是只有5％的气体存在会导致岩石特性发生巨大变化，随着天然气饱和度的进一步增加，岩石特性将保持恒定，从而使其具有一定的稳定性。很难区分地震数据上的天然气的经济饱和度和次经济度饱和度。岩石物理学的交叉图模型揭示了页岩存在，盐水砂和含烃砂典型的独立聚类点。因此，