单井热吞吐开采南海神狐海域天然气水合物数值模拟_李刚.pdf

62 2 Vol1 62 No1 2 2011 2 CIESC Journal February 2011 李 刚, 李小森 ( , , 510640) : 2007 5 SH 7 , , , , , , , , , , : ; ; ; : TE : A : 04 8- 1157 (2011) 02- 0458- 11 Numerical simulationfor gas productionfrom hydrate accumulated inShenhu Area, South China Sea, using huff and puff method LI Gang, LI Xiaosen (Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Guangzhou Center f or Gas Hydrate Research, Chinese A cade y of Sciences, Guangzhou 510640, Guangdong, China) Abstract: In this w ork, the gas production potential from hydrates at the SH7 drilling site of the Shenhu Area by means of the huff and puff method using a single horizontal w ell w as estimated1 dimensional numerical model w as established based on currently available data from site measurements1T he hydrate accumulations in Shenhu Area are similar to Class deposits ( involving only a HBL) , and the overburden and underburden layers are assumed to be permeable1T he simulation results indicate that the hydrate dissociated zone expands around the w ell, and the hydrate formation occurs during the injection stage of the huff and puff process1 Reasonable injection and production rates should be adopted to avoid the over pressurization and depressurization during each huff and puff cycle1T hermal stimulation is show n to have an effect over a limited range around the w ell1The gas production rate and gas to w ater produc