improve prediction accuracy

Today, I matched the lithology between Atland well and Abernathy well and get better results.

Summary:

Yesterday, I did not match the lithology so that the prediction accuracy is very bad.
Today, I found the problem and matched it to get better results. R2 of Vp and Vs are 0.6419 and 0.5176. NRMSE of Vp and Vs are 0.0928 and 0.0948.
For now, NRMSE is ok but R2 is not high enough (higher than 0.7 is better).
I will see if I can improve it after I finish the letter.

Tomorrow, I will start to think about changing my second paper to a letter.