Volatile organic compounds (VOCs) have been widely concerned as an important precursor of haze. The petrochemical industry not only has many VOC emission sources, but also produces a large amount of VOCs. Although some scholars have analyzed the emission sources of VOCs in the oilfield industry, there still exists the gap in quantitative accounting the emission of organic volatiles from oilfield sewage pools. Moreover, such studies lack certain standardization, accuracy and validity in China. At present, most of the sewage pools in oilfield stations are open-ended. A large amount of VOCs are released into the surrounding environment during the storage of oily wastewater, which has caused serious environmental pollution. In this work, considering six significant influencing factors, a fast VOC emission accounting method from sewage pool in oilfield has been established. To the best of our knowledge, this is the first time to conduct VOC emission quantitative accounting study based on multi-field coupling numerical simulation technology, method of experimental design, and statistical analysis of the response surface methodology. Through comparing the results of numerical simulation with COMSOL, laboratory experiment, and the published literature, the results show that the error is in the range of reasonable, which can satisfy the rapid accounting of VOC emissions from sewage pool in oilfield.