To resolve the problem, based on backpressure test theory and superposition principle, this paper designed a new test method, named Backpressure Isochronal Test.

• 以回压试井理论和渗流叠加原理为基础,提出了"回压等时试井"产能评价方法,该法所需测试时间与"单点法"大致相同,但能较准确地评价低渗气井产能。