An ideal well-test interpretation solution should be comprehensive enough to incor­porate the important mechanisms, and sufficiently simple to allow estimation of the controlling properties and parameters through inversion. This has been possible in the case of hydrate-capped gas reservoir [49]. Similar solutions for more prevalent GH accumulations, i. e., those that are within the hydrate stability zone and coexist with formation water, have yet to be developed. It is known whether such a complex and nonlinear problem can be simplified sufficiently to yield analytical solutions. Further complexities make the application of such solutions (even if they are pos­sible) problematic. Thus, the strong nonlinearity of the hydrate problem renders the principle of superposition (upon which a large part of well-testing techniques are founded) inapplicable. Additionally, the concept of radius of influence may be inap­plicable to GH reservoirs [127].

5.2.1 Practical Challenges

Actual well-test data from GH deposits are scarce. It is expected that our ability to interpret these tests will improve as we acquire more well-test data of longer duration [127].