频变avo反演的MATLAB代码
时间: 2024-04-14 10:16:53 浏览: 59
以下是一个简单的频变avo反演的MATLAB代码:
% 导入数据
seismic = load('seismic_data.mat');
vp = load('vp_data.mat');
vs = load('vs_data.mat');
% 设置参数
freq = 30; % 频率(Hz)
theta = 0:90; % 角度
rho = 2.65; % 密度
% 计算反射系数和avo属性
rc = (vp - vs) ./ (vp + vs);
ai = (vp(2:end) .* rho(2:end) - vp(1:end-1) .* rho(1:end-1)) ./ (vp(2:end) .* rho(2:end) + vp(1:end-1) .* rho(1:end-1));
si = (vs(2:end) .* rho(2:end) - vs(1:end-1) .* rho(1:end-1)) ./ (vs(2:end) .* rho(2:end) + vs(1:end-1) .* rho(1:end-1));
psi = si ./ ai;
% 计算avo反演
avo = zeros(length(theta), 1);
for i = 1:length(theta)
angle = theta(i);
wavelet = rickerwavelet(30, freq);
trace = seismic(:, angle);
rc_trace = rc(:, angle);
ai_trace = ai(:, angle);
si_trace = si(:, angle);
psi_trace = psi(:, angle);
avo(i) = avo_inversion(trace, rc_trace, ai_trace, si_trace, psi_trace, wavelet);
end
% 绘制avo曲线
plot(theta, avo);
xlabel('Angle');
ylabel('AVO');
title('AVO Inversion');