Western Australia's First Underground Gas Storage Field: Sub-Surface Integrity Issues

2011 ◽  
Author(s):  
Jonathan Serfaty ◽  
Mark Pogson ◽  
Bashirul Haq
Keyword(s):  
Surface Integrity ◽  
Gas Storage ◽  
Underground Gas Storage

A study of subsurface integrity issues for the Mondarra underground gas storage field

2011 ◽  
Vol 51 (1) ◽  
pp. 215
Author(s):  
Jonathan Serfaty ◽  
Mark Pogson ◽  
Bashirul Haq
Keyword(s):  
Surface Integrity ◽  
Gas Storage ◽  
Operating Conditions ◽  
Reciprocating Compressor ◽  
Underground Gas Storage ◽  
Gas Reservoirs ◽  
Variable Permeability ◽  
Well Integrity ◽  
Large Pressure ◽  
Induced Changes

In gas reservoirs, issues related to declining deliverability and injectivity, well integrity and reservoir integrity are often found. These may become more common, however, in fields used for underground gas storage (UGS). This may be due to extreme operating conditions–primarily cyclical phases of production and injection often associated with large pressure and temperature fluctuations within the reservoir and wellbore, in addition to operating with significant pressure depletion. This study identifies specific sub-surface integrity issues that have affected the Mondarra gas storage facility. The Mondarra facility is Western Australia’s only UGS operation, owned and operated by the APA Group: Australia’s largest natural gas infrastructure business. Specific sub-surface integrity issues related to UGS were investigated. Results indicate that the production and injection cycles have decreased deliverability by 4.4% annually since 2007, primarily by plugging pore throats with inorganic precipitates, such as siderite and organic residues from the reciprocating compressor. Reservoir integrity, represented as a reduction in effective connected volume, has been identified as an issue following early re-pressurisation of the field. Detailed production monitoring and reservoir modelling has been used to investigate this risk and determine the likely range of outcomes. The mechanism of this reduced effective connected volume is uncertain; however, suggested reasons include: pressure-induced changes in the conductivity of micro-fractures and transmissibility of faults; compaction of the reservoir; or, water encroachment post depletion. Furthermore, sub-surface modelling has indicated a complex connectivity picture with multiple compartments and variable permeability layers impacting gas storage operations.

Uncertainty failure risk quantitative assessments for underground gas storage near-wellbore area

2021 ◽  
Vol 36 ◽  
pp. 102393
Author(s):  
Shengyue Zhang ◽  
Yifei Yan ◽  
Zhonghui Sheng ◽  
Xiangzhen Yan
Keyword(s):  
Gas Storage ◽  
Underground Gas Storage ◽  
Failure Risk ◽  
Quantitative Assessments

scholarly journals Change of phase state during multi-cycle injection and production process of condensate gas reservoir based underground gas storage

2021 ◽  
Vol 48 (2) ◽  
pp. 395-406
Author(s):  
Yong TANG ◽  
Keji LONG ◽  
Jieming WANG ◽  
Hongcheng XU ◽  
Yong WANG ◽  
...  
Keyword(s):  
Production Process ◽  
Phase State ◽  
Gas Storage ◽  
Underground Gas Storage ◽  
Gas Reservoir

scholarly journals Research on Injection-Production Capability and Seepage Characteristics of Multi-Cycle Operation of Underground Gas Storage in Gas Field—Case Study of the Wen 23 Gas Storage

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3829
Author(s):  
Jie Zhang ◽  
Feifei Fang ◽  
Wei Lin ◽  
Shusheng Gao ◽  
Yalong Li ◽  
...  
Keyword(s):  
Transition Zone ◽  
Pore Volume ◽  
High Speed ◽  
Gas Storage ◽  
Production Flow ◽  
Underground Gas Storage ◽  
Gas Recovery ◽  
Gas Drive ◽  
Gas Fields ◽  
Water Gas

With the increasing energy demands of current modern society, underground gas storage (UGS) in gas fields is the most popular type of UGS used to meet the seasonal variation of gas consumption. However, compared with gas fields, UGS in gas fields has the characteristics of periodic high-speed injection and production of exploitation modes and operation rules, which causes the rules of gas-water seepage and utilization of reserves to be more particular and complicated. In this paper, based on Wen 23 gas storage, the rules of multicycle injection and production flow and the utilization of UGS pore volume were investigated. The experimental results showed that variation in porosity and permeability caused by injection and production pressure changes in Wen 23 gas storage can be neglected. The pore volume of gas storage and the degree of gas recovery increased gradually in the pre-UGS gas zone, which was higher than that of reservoirs. In the initial stage of UGS operation, the pore volume of gas storage and the degree of gas recovery were low in the gas-drive-water gas zone as a result of water invasion during the process of reservoir exploitation. During operation of multicycle high-speed injection and production, the seepage conditions in the gas-drive-water gas zone gradually improved. The higher the reservoir permeability, the greater increases in pore volume and degree of gas recovery. In the gas-water transition zone, gas and water were reciprocated and displaced with the multicycle injection-production of UGS, resulting in the gradual deterioration of pore volume and gas recovery, which remained stable at a low value. The negative effects of reservoir heterogeneity on the effective utilization of UGS occurred in the gas-water transition zone. These findings may contribute to a better understanding of the rules of multicycle injection and production flow and utilization of UGS to optimize the injection-production efficiency of Wen 23 gas storage.

Isolation and investigation of anaerobic microorganisms involved in methanol transformation in an underground gas storage facility

Microbiology ◽  
2011 ◽  
Vol 80 (2) ◽  
pp. 172-179 ◽  
Author(s):  
A. L. Tarasov ◽  
I. A. Borzenkov ◽  
N. A. Chernykh ◽  
S. S. Belyayev
Keyword(s):  
Gas Storage ◽  
Storage Facility ◽  
Underground Gas Storage ◽  
Anaerobic Microorganisms
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