This dataset is a market activity representing the consumption market of the region. The dataset includes transport, freight from the plant gate to the consumer end, where transport services are calculated based on the transportation situation of the product in the region. This dataset represents the product's bill of materials from cradle to gate. The dataset contains the offshore production of natural gas from thickened oil fields and low-permeability thickened oil fields. In China, thickened oil accounts for 10% and unthickened oil accounts for 90% of the natural gas production. This dataset can represent China's average production mix. thickened oil reservoirs refer to those where, under reservoir conditions, the viscosity of the stored petroleum is greater than 50 mPas. The petroleum in thickened oil reservoirs has high viscosity and poor fluidity, making it difficult to exploit. Low-permeability oil fields refer to those with low permeability, low abundance, and low productivity per well. The net calorific value of petroleum is 43.4 MJ/kg, and the average calorific value of natural gas is 36 MJ/Sm3.