Your salary is high. It's depends upon your luck you can able to get it.
Current Process in Family Visa:
1. Salary Letter from Employer -salary overall to be minimum 10000 QAR
2. Copy of Your passport and Work VISA Page
3. Copy of your Education Certificate (ATTESTED )
4. Wife's Passport Copy
5. Marriage Certificate (ATTESTED )
6. Child(s) Birth Certificate(s) (ATTESTED )
7) rent agreement duly attested by muncipility (muncipilty shall require another set of documents like copy of title, copy of owner QID, lay out, etc. for stamping)
8, 6 Months bank statement