Surface Data Recorders Modernize Underutilized Techniques. Impulse testing has been around for some time and analytical theory is well documented. Modern electronic surface data acquisition equipment has made impulse testing practical and economic in the Western Canada Sedimentary Basin. Issues advancing usage include under-balanced perforating, coiled tubing frac’s, by-passed pay, ultimate recovery in low deliverability systems, flaring, confidentiality, and general exploitation. Order-of-magnitude reservoir flow characteristics (kh, s, q, p*) can be estimated using both conventional and modern analytical techniques. This example #welltest was from a high permeability (k) gas (#LNG) well.