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在我国油气资源中,河流相储层是十分重要的油气储集层。通常利用地震反演来进行河道砂体的识别与描述,而河道砂体模型的正演研究较少。本文从河道砂体叠置类型研究出发,然后建立了四种河道砂体叠置模型,对其进行正演,并对结果进行了分析。结果表明:在地震剖面上,孤立型河道砂体易于识别,由于砂体内部反射相互干涉,侧向叠置型和复杂叠置型的河道砂体难以识别。
Among the oil and gas resources in our country, fluvial facies reservoirs are very important oil and gas reservoirs. Seismic inversion is usually used to identify and describe channel sand bodies, while less research on channel sand body models is conducted. Based on the study of superimposed types of river sand bodies, this paper establishes four kinds of superimposed models of river sand bodies, forwards them and analyzes the results. The results show that isolated sand bodies are easy to identify in the seismic section. Because of the internal reflection of the sand body, the sand bodies in the laterally superimposed and complex superimposed channels are difficult to identify.