INVESMENT
ANALYSIS
Underneath the Chinese capital about 300 wells have been drilled about 3 kilometers deep, from which water heated to 70°C is pumped out. The planet's energy extracted from such depths is used for central heating of high-rise buildings and for maintaining the desired temperature in greenhouses.To cool rooms in summer our company uses horizontal heat exchangers installed not too deep in the soil, capable of cooling water in the system to 18-15°C. Exploration and development of hydrocarbons shows that sedimentary basins are rich not only in hydrocarbon resources, but also in medium-temperature and low-temperature geothermal resources.The latest assessment of geothermal resources of major oil and gas bearing basins shows that in the most resource-rich basins, the Bohai Bay Basin and the Sunliao Basin, the total geothermal resources in Daqing, Liaohe and Huabei fields are up to 11,012×1018 J, and the recoverable geothermal resources are up to 424×1018 J, equivalent to 3757×108 tons and 145×108 tons of standard coal respectively Calculation of geothermal resources is based on the volumetric method and calculation formulas : where, A- block area, m2; d- average block thickness, m; Φ- average reservoir porosity, %; tr- reservoir temperature, °C; tj- normal temperature zone temperature, °C; - reservoir rock density, kg/m3; Cc- specific heat capacity of reservoir rock, J/(kg-°C); - reservoir water density, kg/m3; Cw- specific heat of reservoir water, J/(kg-°C). It is well known that oil fields are both major producers and consumers of energy, and large amounts of gas, oil and coal are consumed annually for heating living quarters, thermal utilization of heavy oil, collection and transportation of oil, etc. Many technological activities consume large amounts of heat during oil production; for example, crude oil dewatering and transportation require heating, and especially heavy oil with higher viscosity needs to be heated to reduce its viscosity before being transported through the pipeline.According to statistics, the annual energy consumption of oil field furnaces and boilers is at least 1.0×106 tons of crude oil and 30×108 m3 of gas. Consumption of gas and oil increases not only operational costs, but also the living costs of workers, for example, who maintain complex installations and systems.The exploitation and utilization of the available geothermal resources of oil fields can not only replace oil, gas, coal and other fossil fuels, but can also provide a new way to diversify the oil field economy and future development. In addition, the annual volume of water extracted from the field exceeds 7×108 m3, water which contains rich medium temperature and low temperature geothermal energy already ready for use. According to the calculation of heat energy extraction at 10 degrees Celsius (heat pump), the available heat energy is equivalent to about 1.3×106 tons of standard coal, and also equivalent to an oil field with annual oil production of 0.9×106 tons; which is quite a significant amount of heat