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Citation: Xiong Yu, Mo Jun, Li Peisi, Jiang Jun, Zhang Liehui. Analysis and Evaluation of Bound Water Drying Reaction and Drying Effect in Tight Reservoir[J]. Chemistry, ;2018, 81(7): 646-652. shu

Analysis and Evaluation of Bound Water Drying Reaction and Drying Effect in Tight Reservoir

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500

Received Date: 22 September 2017
Accepted Date: 3 May 2018

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By injecting drying agent into tight reservoir and drying formation water can reduce water saturation and raise gas seepage capacity of reservoir. On the basis of drying principle of tight gas reservoir, the principle drying experiment of selected drying agent showed that the actual water consumption of drying agent is larger than theoretical water consumption. According to analysis, the actual drying effect is also affected by the thermal effect of chemical reaction. Based on thermochemical theory, this paper studies the thermal effect of reaction between drying agent and water, and the affection of thermal effect for drying tight gas reservoir. Considering the fact that the formation is often under different temperature and pressure, the variation of thermal effect with the temperature and pressure of system is also studied. The results showed that the reaction between selected drying agent and water release about 5.28 kJ/g of heat, it accelerates the reaction speed and also makes the water molecules into vapor phase so as to improve the drying efficiency. The heat of chemical reaction of drying agent is increased with temperature and pressure. The change of temperature and pressure has little influence on the water consumption of heat evaporation.
- Tight gas reservoir,
- Drying agent,
- Thermal effect,
- Quantity of heat
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