【摘要】 中国西部地区碳酸盐岩储层声波测井资料质量普遍受到测量环境引起的设备失真、泥浆侵入和扩径等因素的干扰。设计了针对性的方案来解决这一难题:从岩石的微观结构出发,通过理论推导和实验统计的方法,提出了一种改进的碳酸盐岩岩石物理建模方法,实现了弹性参数响应的预测;新方法通过参数提取的方式实现了目的层岩石物理特征的快速描述。在此基础上,依据不同尺度测量信息的统计相似性原理,给出了一种面向碳酸盐岩储层的声波速度的上、下界判定准则,该准则利用岩石物理信息来评价声波测井资料质量,进而实现测量值的校正。通过实际测井曲线的验证分析,表明新方法可以:快速建立碳酸盐岩的岩石物理特征与弹性参数响应的对应关系;依据多条曲线准确提取目的层的岩石物理参数;有效评价和改善声波测井资料品质。综上,新方法在油气田勘探和开发领域内有进一步理论研究和实际推广的价值。更多还原

【Abstract】 For carbonate rocks in western China,interference from experimental environments,such as equipment distortion,mud invasion and expansion,sensitively affects data quality of acoustic logging measurements. In order to settle these problems,a new scheme was used based on rock physics theories. Firstly,a modelling method was invented to investigate elastic response of carbonate rocks based on physical characters and mathematical statistics. Secondly,author proposed a criterion to predict upper and lower boundaries of rock velocities. On these bases,a correction strategy for carbonate rock velocity was proposed. In laboratory test,favorable results have demonstrated that model could establish relationships between physical and elastic parameters,and moreover,it could also quickly estimate micro-structures of rocks. In field data test,rock physics has shown its advantages as a new tool for acoustic curves corrections. It is concluded that model-based processing scheme has a promising application prospect at earlier exploration stages.更多还原