川东二叠系生物礁油气藏的地震勘探技术

 生物礁油气藏是一种特殊的岩性油气藏，由于其地质特点的多样性和复杂性，使得生物礁的地震勘探难度很大。本文针对川东地区二叠系生物礁的地质特点和资料情况，以生物礁气藏为研究对象，从已知井井震响应特征分析出发，通过地震反射结构分析、神经网络波形分类处理、地震属性分析、三维可视化解释、多参数地震反演等多项地震特殊处理和解释方法，建立了生物礁和生物礁储层的判别模式，形成了有针对性的地震勘探配套技术。其中以伽马、补偿中子及声波为目标曲线的多参数地震反演技术对于预测和评价生物礁特别有效。

Seismic exploration technology of Permian biohermal reservoir in eastern Sichuan area

Biohermal reservoir is a typical lithologic reservoir, which makes the seismic exploration of bioherm very difficulty since the multiplicity and complexity of its geologic feature. In view of Permian biohermal geologic feature and data cases in eastern Sichuan area, the paper, taking biohermal gas reservoir as a studied object and starting from the analysis of feature of seismic response in the known wells, built up discriminating mode of bioherm and biohermal reservoir by multiple seismic special processing and interpretation approaches such as analysis of seismic reflection structure, waveform-categorized processing in neural network, analysis of seismic attributes, 3-D visualization interpretation and seismic multi-parameter inversion etc., forming purposeful necessary techniques of seismic exploration. Among these techniques, the seismic multi-parameter inversion taking the gamma, compensated neutron and acoustic curves as objective curves is very effective on prediction and evaluation of bioherm.