项目名称: 碳酸盐岩孔隙结构对其弹性波特性的影响规律研究
项目编号: No.51274230
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 矿业工程
项目作者: 王瑞和
作者单位: 中国石油大学(华东)
项目金额: 82万元
中文摘要: 碳酸盐岩油气藏是我国油气资源发展战略的重要领域,碳酸盐岩地层压力预测是制约其有效勘探开发的世界性难题,其主要原因是碳酸盐岩孔隙结构复杂,使其弹性波速度分布范围大,现有模型描述效果差。因此,建立考虑孔隙结构的碳酸盐岩弹性波速度预测模型,是突破其地层压力预测的关键。本项目拟采用实验与数值模拟相结合的方法,系统研究碳酸盐岩孔隙结构对其弹性波特性的影响规律。通过岩心数字图像,确定碳酸盐岩孔隙结构参数的统计性质,对碳酸盐岩孔隙结构及其弹性波传播特性进行物理模拟研究;建立考虑孔隙结构的多孔介质弹性特征数值模拟方法,模拟不同孔隙结构碳酸盐岩的弹性波传播规律;测量不同应力状态下碳酸盐岩的纵、横波速度,设计基于弹性波速度的孔隙结构反演算法,研究应力状态对裂隙密度的影响规律。综合以上研究,建立考虑孔隙结构的碳酸盐岩弹性波速度预测模型,为基于弹性波资料的碳酸盐岩地层压力预测奠定理论基础。
中文关键词: 碳酸盐岩;孔隙结构;弹性波;速度;衰减
英文摘要: Carbonate reservoir is an important area for the oil and gas resource development strategy of our country. The pore pressure prediction in carbonates is a world-wide problem which restricts the effective exploration and development of carbonate reservoirs. For the complex pore structure of carbonates, the velocity scattering is wide and the velocity prediction models don't work well in carbonates. Therefore, developing a velocity prediction model including the influence of pore structure for carbonates is the key of solving the carbonate pore pressure prediction problem. This program will systematically study the pore structure and its effects on elastic wave properties in carbonates by experiments and numerical simulation. The statistic properties of carbonate pore structure parameters can be established based on digital pictures of cores, and physically model the carbonate pore structure and its elastic wave properties. A numerical simulation method of poroelasticity considering pore structure will be developed and simulate elastic wave propagation in carbonate with different pore structure. Measuring the velocities of carbonate under different stress condition, designing an inversion algorithm for pore structure parameters using elastic wave data, the influence of stress condition on crack density will be dis
英文关键词: carbonate rocks;pore structure;elastic wave;velocity;attenuation