Production characteristic investigation of the Class I, Class II and Class III hydrate reservoirs developed by the depressurization and thermal stimulation combined method

被引:28
|
作者
Xia, Zhizeng [1 ,2 ]
Hou, Jian [1 ,2 ]
Liu, Yongge [1 ,2 ]
Li, Shuxia [1 ,2 ]
Du, Qingjun [1 ,2 ]
Lu, Nu [1 ,2 ]
机构
[1] China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266580, Shandong, Peoples R China
[2] China Univ Petr, Coll Petr Engn, Qingdao 266580, Shandong, Peoples R China
基金
美国国家科学基金会; 中国国家自然科学基金;
关键词
Production characteristic; Depressurization and thermal stimulation combination; Class I hydrate reservoir; Class II hydrate reservoir; Class III hydrate reservoir; GAS-PRODUCTION; METHANE HYDRATE; WATER STIMULATION; HORIZONTAL WELL; HEAT-TRANSFER; POROUS-MEDIA; ACCUMULATIONS; DISSOCIATION; SIMULATION; SYSTEM;
D O I
10.1016/j.petrol.2017.07.012
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The production characteristics of Class I, Class II and Class III hydrate reservoirs are systematically investigated and compared using the depressurization and thermal stimulation combined method, and the roles of the reservoir and operation parameters in the hydrate reservoir development are discussed. According to different reservoir conditions, three forms of the combined method are selected for study: the wellbore-heating-assisting depressurization method, the hot-water-flooding method and the wellbore heating with depressurization method. Under the conditions in this paper, the results show the following: (1) For the Class I hydrate reservoir, the gas production rate is high in the early period, during which most gas is produced; for the Class II hydrate reservoir, the gas production rate maintains high throughout the entire production period; for the Class III hydrate reservoir, the gas production rate periodically varied. (2) From the production view (gas recovery percent and hydrate dissociation percent), the Class I hydrate reservoir is more favorable for development than the Class II and Class III hydrate reservoirs; from the economic view (energy ratio), the Class I hydrate reservoir is better than the Class II and Class III hydrate reservoirs. (3) In the combined method, thermal stimulation plays an increasingly important role from Class I to Class III hydrate reservoirs, and the effect of depressurization gradually weakens.
引用
收藏
页码:56 / 67
页数:12
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