Hi Ashish,
The best suitable is SAP IS-OIL and take MM module in it. As you have Oil and Gas experience it is niche skill and highly demand in market. As per my opinion if you take SAP ECC MM then it would not have 100% result for you as you have good IS-OIL background.
You can check this one SAP Oil & Gas (RLM - Remote Logistics Management) - SAP Library
and also you can take IOGW50 - Remote Logistics Management (RLM) | SAP Training and Certification Shop
training on this.
Regards,
RC nGopi