Abstract: Yuanba area in northeast of Sichuan is the key exploration and development area of Southwest Petroleum Branch. It has rich resources of natural gas with tremendous potential for exploration and development, and the principal Changxing gas reservoir contains H₂S and CO₂. Because the area is in the exploration stage, its deliverability and rate-maintenance capability is uncertain, and H₂S content is fluctuating, so it is very difficult to select desulfurization technology during production test of this area. Closely combining present exploration situation in Yuanba, and taking deep analysis of mature desulfurization technology with principle of high suitability and economic feasibility, this article proposed the technique ideas of production test for small and medium-sized desulfurization in small region, and forms a preliminary technology plan, which offers elementary technology clue and basis for deeper exploration and later production of sour gas wells in this area.