SAP B1 - SQL Log File Occupied Full Space In System

Dear Experts,

SAP B1 using system SQL log file occupied 150 GB in drive. I did shrink log file. But its not deduct the spaces in drive.

Please guide any solution.

SQL Server 2008 R2 and SAP B1 9.0 PL 04

Thanks and Regards

J.M.Halik