Study on foam transport mechanism and influencing factors in foam drainage gas recovery of natural gas well

Huang, Bin; Nan, Xiaohan; Fu, Cheng; Zhou, Wanfu; Fu, Siqiang; Zhang, Tingwei

doi:10.1080/01932691.2021.1915160

Cited by 7 publications

(1 citation statement)

References 21 publications

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“…The common drainage gas recovery technologies mainly include three categories: mechanical method, gas dynamics method, and chemical method. − The mechanical method mainly includes the plunger gas lift method using an electric submersible pump or a gas acceleration pump for drainage and gas production . The mechanical method has a relatively large daily displacement, a high degree of automation, and wide application, but the initial investment cost and the later management and maintenance costs are relatively high, and some technologies are restricted by the depth of the well .…”

Section: Introductionmentioning

confidence: 99%

Study on Screening and Evaluation of Foam Drainage Agents for Gas Wells with High Temperature and High Pressure

et al. 2023

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Foam drainage gas recovery technology is a chemical method to solve the serious bottom-hole liquid loading in the middle and late stages of gas well production, and the optimization of foam drainage agents (referred to as FDAs) is the key to the technology. According to the actual reservoir conditions, a high-temperature and high-pressure (HTHP) evaluation device for FDAs was set up in this study. The six key properties of FDAs, such as HTHP resistance, dynamic liquid carrying capacity, oil resistance, and salinity resistance, were evaluated systematically. Taking initial foaming volume, half-life, comprehensive index, and liquid carrying rate as evaluation indexes, the FDA with the best performance was selected and the concentration was optimized. In addition, the experimental results were verified by surface tension measurement and electron microscopy observation. The results showed that the sulfonate compound surfactant (UT-6) had good foamability, excellent foam stability, and better oil resistance at high temperature and high pressure. In addition, UT-6 had stronger liquid carrying capacity at a lower concentration, which could meet the production requirement when the salinity was 80 000 mg/L. Therefore, compared with the other five FDAs, UT-6 was more suitable for HTHP gas wells in block X of the Bohai Bay Basin, whose optimal concentration was 0.25 wt %. Interestingly, the UT-6 solution had the lowest surface tension at the same concentration, with the generated bubbles being closely arranged and uniform in size. Moreover, in the UT-6 foam system, the drainage speed at the plateau boundary was relatively slower with the smallest bubble. It is expected that UT-6 will become a promising candidate for foam drainage gas recovery technology in HTHP gas wells.

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Section: Introductionmentioning

confidence: 99%

Study on Screening and Evaluation of Foam Drainage Agents for Gas Wells with High Temperature and High Pressure

et al. 2023

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Synthesis and Performance Evaluation of Temperature and Salt-Resistant Foam Drainage Agent XY-1

Lai

Zhang

et al. 2022

Arab J Sci Eng

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Research and development of new intelligent foaming and discharging agent system

Zhao,

Fu,

Hou

et al. 2024

Sci Rep

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The application of classic foaming agent faces several issues, including excessive use of defoaming agent, inadequate defoaming, pipeline blockage due to silicone oil precipitation, and high development cost of the foaming agent. To address the aforementioned issues, a novel intelligent foaming agent was created. This resulted in the development of a new intelligent foaming and discharging agent system. The study focused on analyzing key performance indicators of the foaming agent system, including temperature resistance, salt resistance, oil resistance, phase transition temperature point, foaming ability, foam half-life, liquid carrying capacity, and self-defoaming ability. The experimental findings indicate that TS-1 and ESAB exhibit favorable foaming performance and stability under the conditions of 90 °C temperature, 20 × 10 4 mg/L salinity, and 40% condensate oil content after a 1:1 mixture. Additionally, they are capable of undergoing phase transition within the temperature range of 12 to 15.2 °C. The Waring blender stirring method resulted in the foaming agent solution, which had a concentration of 3 g/L, reaching a volume of 487 mL. The foam’s half-life was 20 min, and the liquid carrying rate was 91.7%. After a duration of 20 min, the rate of self-defoaming was 81.6%. The addition of the self-developed synergist facilitated the defoaming process, which was successfully accomplished within a time frame of 10 min. Moreover, the self-defoaming rate achieved a remarkable 100%. The foam drainage agent system may autonomously react to variations in ambient temperature and achieve phase transition behavior through temperature stimulation. This is accomplished by utilizing the natural temperature difference between the bottom hole and the wellhead during foam drainage gas recovery operations. This innovation presents a novel concept for the foam drainage agent used in recovering drainage gas. It simplifies the operation of gas recovery in oil and gas wells, provides solutions for further smartening up oil and gas fields. It holds immense theoretical and practical importance.

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Study on foam transport mechanism and influencing factors in foam drainage gas recovery of natural gas well

Cited by 7 publications

References 21 publications

Study on Screening and Evaluation of Foam Drainage Agents for Gas Wells with High Temperature and High Pressure

Study on Screening and Evaluation of Foam Drainage Agents for Gas Wells with High Temperature and High Pressure

Synthesis and Performance Evaluation of Temperature and Salt-Resistant Foam Drainage Agent XY-1

Research and development of new intelligent foaming and discharging agent system

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