This dataset represents the cradle-to-gate inventory of the product. It includes multi-technology comprising of water flooding and steam injection, where the proportions for petroleum production in China are 80% water flooding and 20% steam injection. This dataset can represent the average production mix in China. Water flooding technology: As an essential method to increase oil field recovery, water flooding enhances the formation pressure and pushes petroleum towards the wellhead by injecting water or other fluids into the oil strata. Steam injection technology: This technology is primarily used in the development of thickened oil reservoirs. By injecting high-temperature steam into the oil strata, the viscosity of petroleum is reduced, improving its flowability and thus facilitating extraction. thickened oil reservoirs refer to reservoirs where the viscosity of the stored petroleum is greater than 50 mPas under reservoir conditions. The petroleum in thickened oil reservoirs has high viscosity and poor fluidity, making it difficult to exploit. The net calorific value of petroleum is 43.4 MJ/kg, and the average calorific value of natural gas is 36 MJ/Sm3.