Study of production of Class Ⅱ hydrate reservoir by hot water flooding

XIA Zhizeng; WANG Xuewu; SHI Fengxia; GUO Jin

doi:10.16562/j.cnki.0256-1492.2018102603

2020 Vol. 40, No. 2

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Article navigation > Marine Geology & Quaternary Geology > 2020 > 40(2): 158-164

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XIA Zhizeng, WANG Xuewu, SHI Fengxia, GUO Jin. Study of production of Class Ⅱ hydrate reservoir by hot water flooding[J]. Marine Geology & Quaternary Geology, 2020, 40(2): 158-164. doi: 10.16562/j.cnki.0256-1492.2018102603

Citation:

XIA Zhizeng, WANG Xuewu, SHI Fengxia, GUO Jin. Study of production of Class Ⅱ hydrate reservoir by hot water flooding[J]. Marine Geology & Quaternary Geology, 2020, 40(2): 158-164. doi: 10.16562/j.cnki.0256-1492.2018102603

Study of production of Class Ⅱ hydrate reservoir by hot water flooding

China University of Petroleum, College of Shengli, Dongying 257061, China

Received Date: 26 October 2018

Revised Date: 14 March 2019

Publish Date: 25 April 2020

Abstract

Abstract

As a kind of new energy source, natural gas hydrates are widely distributed in both permafrost and deep ocean sediments. Among different types of hydrate reservoirs, the Class Ⅱ hydrate reservoir is the most prevalent production target. In order to study the behavior of the Class Ⅱ hydrate reservoir in production, this paper investigated the hydrate reservoir production using the hot water flooding method according to the parameters reported in literatures. The results are compared with those by the depressurization method. The results show: 1) when the Class Ⅱ hydrate reservoir is developed by hot water flooding, the gas production rate increases rapidly in the early stage, and then declines until it reaches a relatively stable level. The gas dissociation rate varies similarly to the gas production rate. The cumulative produced gas and dissociated gas increase rapidly at first, and then increase linearly. Both the gas recovery percent and hydrate dissociation percent remain on high levels (＞60%). 2) the hot water flooding method is suitable for the Class Ⅱ hydrate reservoir development. Compared with the depressurization method, the hot water flooding method can achieve higher gas recovery percent and hydrate dissociation percent. But the gas-water ratio is higher, indicating a larger amount of water production.
- Class Ⅱ hydrate reservoir /
- hot water flooding /
- production characteristics /
- comparison

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References

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