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Home > Archive>Volume 50, Issue 5, 2023 >101-108. DOI:10.12143/j.ztgc.2023.05.015
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Numerical simulation of gas hydrate exploitation in the Shenhu Sea area by injecting methanol inhibitor
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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

Clc Number:

P634;TE53

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    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.

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History
  • Received:December 30,2022
  • Revised:May 06,2023
  • Adopted:May 11,2023
  • Online: November 02,2023
  • Published: September 10,2023
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