Numerical simulation of gas hydrate exploitation in the Shenhu Sea area by injecting methanol inhibitor

ZHANG Yongtian; CHEN Chen; MA Yingrui; LI Xitong; ZHONG Xiuping; NIE Shuaishuai; XU Jinjie and TU Guigang; ${author.authorNameEn}

doi:10.12143/j.ztgc.2023.05.015

2023 Vol. 50, No. 5

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Article navigation > DRILLING ENGINEERING > 2023 > 50(5): 101-108

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ZHANG Yongtian, CHEN Chen, MA Yingrui, LI Xitong, ZHONG Xiuping, NIE Shuaishuai, XU Jinjie and TU Guigang, . 2023. Numerical simulation of gas hydrate exploitation in the Shenhu Sea area by injecting methanol inhibitor. DRILLING ENGINEERING, 50(5): 101-108. doi: 10.12143/j.ztgc.2023.05.015

Citation:

ZHANG Yongtian, CHEN Chen, MA Yingrui, LI Xitong, ZHONG Xiuping, NIE Shuaishuai, XU Jinjie and TU Guigang, . 2023. Numerical simulation of gas hydrate exploitation in the Shenhu Sea area by injecting methanol inhibitor. DRILLING ENGINEERING, 50(5): 101-108. doi: 10.12143/j.ztgc.2023.05.015

Numerical simulation of gas hydrate exploitation in the Shenhu Sea area by injecting methanol inhibitor

1.College of Construction Engineering, Jilin University, Changchun Jilin 130026, China;
2.Key Laboratory of Drilling and Exploitation Technology in Complex Conditions of Ministry of Natural Resources, Changchun Jilin 130026, China;
3.Offshore Oil Production Plant, SINOPEC Shengli Oilfield Company, Dongying Shandong 257237, China

Received Date: 30 December 2022

Revised Date: 06 May 2023

Abstract

Abstract

The gas hydrate reserve is abundant in the Shenhu Sea area， which provides a large amount of energy reserve for our country， and the problem of the shortage of energy can be solved effectively by means of efficient exploitation. Inhibitor injection method is one of the main methods to extract gas hydrate. Methanol is an excellent inhibitor with good inhibition and low viscosity. In this paper， a three-dimension， three-phase and four-component numerical model for gas hydrate exploitation in the sea area was established according to the actual geological parameters. The dynamic characteristics of hydrate exploitation in hydrothermal methanol solution were studied by means of numerical simulation using the horizontal well layout method with production wells on both sides and the injection well in the middle. The extraction effects of single depressurization method and hot water injection method were compared with that of the methanol inhibitor injection and the results show that the later can increase the reservoir temperature and promote the decomposition of hydrate， which improves the shortcomings of the former two methods. It has higher initial gas production rate， higher initial gas-water ratio and higher hydrate decomposition effect， which is a competitive exploitation method.
- gas hydrate /
- extraction methods /
- numerical simulation /
- inhibitor method /
- Shenhu Sea area

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References

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