John H. Martin Associates Ltd.

JHMA is a UK-based E&P subsurface consultancy active in the international upstream oil and gas industry since 1996 We provide services including: Advisory and expert roles for oil-and gas-field unitisation and equity redetermination Support for oil- and gas-field appraisal and development, subsurface asset acquisition and divestment Technical project management for subsurface studies; peer review and technical audit Reservoir development geoscience evaluation Reporting/technical writing and editorial services Training courses and workshops: in-house and public versions. Although a small ‘niche’ company, we have had stable, consistent and continuing activity over 25 years since incorporation.