In order to reduce the development cost and improve the development benefit, the Sulige gas field has formed the “downhole throttling, no heating at the wellhead, no alcohol injection, medium and low pressure gas gathering, liquid metering, inter-well series connection, normal temperature separation, secondary boosting, Centralized processing” unique Sulige ground gathering and transportation system. Multiple wells are connected in series and share a single flowmeter, which leads to the failure of timely and accurate measurement of single-well production. The single-well production is mostly obtained by splitting method, resulting in poor quality of recorded data, which affects the production management, dynamic analysis and development strategies of single wells and gas fields in the later stage. Formulate. With the widespread application of downhole choke technology in Sulige Gas Field, in view of the situation that multiple wells share one flowmeter, this paper proposes a single well production rate of choke well based on the theoretical production principle of choke well and vertical pipe flow method. The calculation method is based on the calculation method of the gas well, and the theoretical gas production of a single well is calculated in real time by using the oil casing pressure data of the gas well, so as to achieve the purpose of production splitting; According to the flow state of the gas well, it can guide the development of subsequent drainage gas production and salvage choke measures. The calculation of the field example shows that the method of calculating the production of choke wells by using the oil casing pressure is feasible, which meets the needs of dynamic analysis and has the value of promotion.