The firm's geologists will now spend three weeks at the Jebel Abyad concession in Sudan carrying out preliminary phosphate exploration work.
Regency has the option to explore four tenements for agro-minerals. Three are to the north and north-west of Khartoum, while the fourth is on the Red Sea coast.
The main aim of the trip is to reduce the size of the target and to discover phosphate occurences.
Regency chairman Andrew Bell told investors: "This is our most extensive field visit in Sudan to date.
"We were pleased with the results of our earlier trip to the Red Sea in July, and this trip will follow-up on aspects of that effort and focus on a second area of prospectivity in our licenses, in this instance for phosphates, at Jebel Abyad.
"The results of these two visits will in aggregate determine where the company will direct future exploration efforts and where we may consider an initial drill campaign in 2014."
The team will working alongside geologists from the Sudanese Ministry of Minerals. An independent consultant with phosphate discovery experience will be an integral member of the team.
Shares edged up 0.84% to 0.60p.