After several months of reviewing leases by Tacoma Energy, HEP Energy and EQX for lands from Hwy. 1 just south of Caddo Lake eastward to the river and extending somewhat into Bossier Parish I am relatively sure that the target is the Annona Chalk. The client upon whose behalf the listed land companies are taking or have taken leases also acquired a couple of state leases in the Soda Lake area through New Holdings LLC. That and the recent permitting of two wells by Petro-Chem Operating Company lead me to believe that the first wells will be drilled soon. The Mills & Co 6 #1 is a vertical well. The Chevron USA Inc 7H Should be the first horizontal attempt at economic production. Although it is possible that Petro-Chem is behind the prospect with some investor assistance, it may be that they are fronting for a larger energy company that would prefer to remain unknown until the initial wells deliver enough science to validate the play and help define the extent of the productive fairway.
Without the section-township-range it is impossible to know if there is a producing well but this contact from a company other than those taking the original leases could be part of division order review in preparation for disbursing royalty payments. The Anadarko Haynesville wells are "wet gas". Predominately gas production with some condensate and natural gas liquids. Ask the landman if he/she knows your net mineral interest. That will help you know if it is worth engaging an O&G attorney. If the interest is small you may want to cooperate and let the landman do the work to prove up your ownership interest. Just make sure that they perform all the work to get you in pay if royalties are due.
It helps me know that there is no producing well as none have been drilled that far north at this time. Ask the landman if he/she is leasing for Anadarko, the s-t-r of your mineral interest and your net ownership interest. Without that information it is impossible to offer any further suggestions.