Advances in field testing of the effective absolute permeability of gas hydrate reservoirs

Natural gas hydrates have been widely treated as a potential energy. The effective absolute permeability of gas hydrate reservoirs is a crucial parameter reflecting the productivity, and it needs to be tested in the field. Advances in field testing of the effective absolute permeability of gas hydrate reservoirs in the world were reviewed. In addition, field-testing methods including wireline formation test and nuclear magnetic resonance logging were introduced, and challenges in on-site testing were addressed. Finally, suggestions were given to develop new field testing methods for future studies.