莫里青断陷地震储层特征及预测技术研究

莫里青断陷有效储层主要位于水下冲积扇扇端和扇三角洲前缘亚相。研究区内扇体叠置,砂体空间变化快,油、气、水关系复杂,储层及流体识别是油气勘探开发面临的瓶颈问题。前期的地震储层预测主要采用地震属性分析技术,不足以解决该区复杂的地质问题。文中在分析储层敏感性参数的基础上,利用叠后波阻抗反演区分岩性、利用叠前反演识别有效储层及利用AVO分析预测流体,取得了较好的效果。

Seismic reservoir characteristics and prediction techniques for Moliqing Rift

Underwater alluvial fan side and fan delta front subfacies are the main effective reservoirs of Moliqing Rift. Moliqing Rift has the characteristics of well developed superimposed fan bodies, rapid variation of sand body space and complex relations among oil, gas and water, so reservoir and fluid identification is the bottleneck problem of the oil and gas exploration in this area. The early seismic reservoir prediction mainly uses seismic attribute analysis technique which is not enough to resolve the complex geologic problems in this area. Based on the reservoir sensitive parameter analysis, post-stack impedance inversion is applied to distinguish lithologies, pre-stack inversion is used to identify effective reservoir, and AVO analysis is adopted to predict fluid medium. And good results are achieved.