Development of Volcanic Gas Reservoirs

With the fast development of the natural gas industry, volcanic gas reservoirs have been paid an increasing attention. Many deep gas wells in volcanic reservoirs have special characteristics, such as high temperature, high pressure and high level of CO2 with strong corrosion effect, which brings great challenge to the safety of the tubing. Therefore, the mechanical analysis of tubing in deep gas wells in volcanic reservoirs is helpful to design the strings, optimize operation parameters and predict service life. In this paper, based on the buckling analysis, a mechanical model of tubing is established and solved by stepwise iterative algorithm. Physical properties of tubular strings and fluid are taken into consideration in new model, as well as the pitting corrosion of CO2. A program also developed for practical purposes. The results can be applied for the safety assessment and life prediction of the tubing in deep gas wells in volcanic reservoirs.

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Nonlinear percolation mechanisms in different storage-percolation modes in volcanic gas reservoirs

Petroleum Exploration and Development ◽

10.1016/s1876-3804(13)60045-2 ◽

2013 ◽

Vol 40 (3) ◽

pp. 372-377 ◽

Cited By ~ 5

Author(s):

Jiaxin DONG ◽

Min TONG ◽

Bo RAN ◽

Ning LI

Keyword(s):

Gas Reservoirs ◽

Volcanic Gas

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Forecast of fractured horizontal well productivity in dual permeability layers in volcanic gas reservoirs

Petroleum Exploration and Development ◽

10.1016/s1876-3804(14)60076-8 ◽

2014 ◽

Vol 41 (5) ◽

pp. 642-647 ◽

Cited By ~ 1

Author(s):

Zhiping WANG ◽

Bo RAN ◽

Min TONG ◽

Chunming WANG ◽

Qingfeng YUE

Keyword(s):

Horizontal Well ◽

Gas Reservoirs ◽

Volcanic Gas ◽

Well Productivity ◽

Fractured Horizontal Well

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The Effect of Stress-Sensitivity on Gas well Production in Volcanic Gas Reservoirs

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.962-965.636 ◽

2014 ◽

Vol 962-965 ◽

pp. 636-641

Author(s):

Tian Qing ◽

Peng Cheng Liu ◽

Zong Yao Qi

Keyword(s):

Volcanic Rocks ◽

Development Program ◽

Prediction Method ◽

Stress Sensitivity ◽

Gas Production ◽

Gas Reservoirs ◽

Volcanic Gas ◽

Exponential Relationship ◽

Gas Well ◽

Well Productivity

During the volcanic gas reservoirs development, stress-sensitivity will result in permeability decline with formation pressure drop, lowering gas production and affecting the whole gas reservoirs development program. On the basis of the stress-sensitivity experiments on volcanic rocks, the characteristic of stress-sensitivity in volcanic reservoirs is analyzed. On this basis, this paper studies the prediction method of gas well productivity in volcanic gas reservoirs with stress-sensitivity, and establishes the mathematical model of constant pressure production in volcanic gas reservoirs. The results show that the permeability of volcanic rocks has an exponential relationship with effective stress. The stronger the stress-sensitivity is, the more the gas well productivity losses under the same conditions. And the reservoir stress-sensitivity will increase the degree of gas well unsteady production decline.

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