The energy consumption of oilfield fuel oil heating furnaces is high, and the sulfur dioxide, nitrogen oxides and soot in the flue gas emitted seriously exceed the standard, causing serious environmental pollution. So it is urgent to replace the oilfield heating furnace. The technology principle, energy consumption calculation, equipment characteristics and feasibility of replacing oil field fuel oil heating furnace of air source heat pump and sewage source heat pump are studied, and the benefits of two heat pump technologies replacing oil field fuel oil heating furnace are analyzed. Through research, it is concluded that the air source heat pump and sewage source heat pump technology are effective ways to replace oil in the oil field heating furnace; by using air source heat pump and sewage source heat pump to replace the fuel oil heating furnace, the operating costs can be reduced by 30% and 45% respectively, and the carbon emissions can be reduced by 60% and 75% respectively. By replacing the fuel oil of the heating furnace, not only can you obtain considerable economic benefits, but you can also effectively reduce the emissions of sulfur dioxide, nitrogen oxides, and smoke.

In view of the weak research on the characteristics of geotemperature⁃pressure system in the northern part of Dongpu Depression, based on the measurements of ground temperature and pressure, the characteristics of geotemperature field, geopressure field and temperature⁃pressure system in the northern part of Dongpu depression are analyzed by T⁃P system theory. Combined with the structure distribution pattern, their effects on hydrocarbon distribution have been analyzed. The study demonstrates that the temperature gradient in north part of Dongpu depression is high, the sag zone has the characteristics of deep buried and high geotemperature, which is beneficial to the maturity of source rocks and the formation of hydrocarbon in the sag zone. The deep overpressure could be as the important motivating force for hydrocarbon migration. In vertical, the T⁃P system includes static pressure geothermal⁃geopressure system and overpressure complex geothermal⁃geopressure system. The lateral T⁃P system can be divided into 5 subareas, namely, HTHP, NTHP, HTNP, NTNP and LTNP, and the low⁃energy NTNP is the place where petroleum mainly accumulates. Different from other hydrocarbon rich depressions in the Bohai bay bain, due to the development of gypsum⁃salt cap rock, a large amount of hydrocarbon has accumulated in the high⁃energy NTHP.

 

The design for export pipeline of high viscous crude oil was optimized based on the engineering project. The simulation and economic comparison of continuous transportation in the single pipeline, continuous transportation of oil and water respectively in two pipelines and batch transportation of oil and water in a same pipeline was performed. According to the analysis results, the batch transportation of oil and water in a same pipeline was the optimal scheme and the optimal diameter was determined. The results can be concluded that gas consumption increased with the rising of transmission temperature and power consumption decreased with rising of transmission temperature by analyzing the influence of the transmission temperature on the energy consumption of pipeline. The operation cost of water blending system rised first and reduced later with rising of transmission temperature,and reached the lowest point when the transmission temperature was between 50 ~ 55 ℃.

The influence of water temperature and water blending ratio on the energy consumption was calculated and analyzed based on the instance of cyclic watered oil gathering.The results can be concluded that gas consumption increased while power consumption decreased with rising of water temperature through calculation in water blending system. The operation cost of water blending system rised first and reduced later with rising of water temperature, and reached the lowest point when the water temperature was between 65~70 ℃.