International oilfield services company, Reservoir Group, has announced the acquisition of Mudlogging Services Inc (MSI), the US-based developer and supplier of the MLogger series of gas detection systems. Founded in 2001, MSI is headquartered in Grand Junction, Colorado. From this base, the company leases its specialised systems and software to a number of major operators and independent oil and gas companies across the US and worldwide, including Mexico, Africa and Eastern Europe.