Optimization of Injection and Production Parameters for Sour Gas Storages: A Case Study

Chen, Zhiming; Li, Xinwei; Zhao, Xiaoliang; Chen, C.; Zhu, Likai; Zhang, Fengyuan; Mu, Lingyu; Zhou, Xincong

doi:10.4043/26686-ms

Cited by 2 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The gases are usually sweetened using different methods. Amine extraction is one of the most commonly used methods in the petroleum industries (Bennion et al 1999;Chen 2016). The separation process results in the production of a waste stream composing of acid gases (CO 2 and H 2 S) and requires a huge capital and operation cost which has raised a cause of concern, given that the companies must ensure their waste is eco-friendly before disposal (Bennion et al 1999).…”

Section: Introductionmentioning

confidence: 99%

Study of the impact of injection parameters on the performance of miscible sour gas injection for enhanced oil recovery

Kaita

Ogolo

et al. 2019

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

Sour gas reservoirs have faced critics for environmental concerns and hazards, necessitating a novel outlook to how the produced sour gases could be either utilized or carefully disposed. Over the years of research and practice, several methods of sour gas processing and utilization have been developed, from the solid storage of sulfur to reinjecting the sour gas into producing or depleted light oil reservoir for miscible flooding enhanced oil recovery. This paper seeks to investigate the impact of injection parameters on the performance of sour gas injection for enhance oil recovery. In designing a miscible gas flooding project, empirical correlations are used and the key parameter which impacts the phase behavior is identified to be the minimum miscibility pressure (MMP). A compositional simulator was utilized in this research work to study the effect of injection parameters such as minimum miscibility pressure, acid gas concentration, injection pressure and injection rate on the performance of miscible sour gas injection for enhanced oil recovery. The findings showed that methane concentration had a significant impact on the MMP of the process. Additionally, an increase in acid gas concentration decreases the MMP of the process as a result of an increase in gas viscosity, consequently extending the plateau period resulting in late gas breakthrough and increased overall recovery of the process.

show abstract

Section: Introductionmentioning

confidence: 99%

Study of the impact of injection parameters on the performance of miscible sour gas injection for enhanced oil recovery

Kaita

Ogolo

et al. 2019

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

show abstract

Simulation study of hydrogen sulfide removal in underground gas storage converted from the multilayered sour gas field

Yang,

Li,

Wang

et al. 2023

Int J Coal Sci Technol

View full text Add to dashboard Cite

A simulation study was carried out to investigate the temporal evolution of H2S in the Huangcaoxia underground gas storage (UGS), which is converted from a depleted sulfur-containing gas field. Based on the rock and fluid properties of the Huangcaoxia gas field, a multilayered model was built. The upper layer Jia-2 contains a high concentration of H2S (27.2 g/m3), and the lower layer Jia-1 contains a low concentration of H2S (14.0 mg/m3). There is also a low-permeability interlayer between Jia-1 and Jia-2. The multi-component fluid characterizations for Jia-1 and Jia-2 were implemented separately using the Peng-Robinson equation of state in order to perform the compositional simulation. The H2S concentration gradually increased in a single cycle and peaked at the end of the production season. The peak H2S concentration in each cycle showed a decreasing trend when the recovery factor (RF) of the gas field was lower than 70%. When the RF was above 70%, the peak H2S concentration increased first and then decreased. A higher reservoir RF, a higher maximum working pressure, and a higher working gas ratio will lead to a higher H2S removal efficiency. Similar to developing multi-layered petroleum fields, the operation of multilayered gas storage can also be divided into multi-layer commingled operation and independent operation for different layers. When the two layers are combined to build the storage, the sweet gas produced from Jia-1 can spontaneously mix with the sour gas produced from Jia-2 within the wellbore, which can significantly reduce the overall H2S concentration in the wellstream. When the working gas volume is set constant, the allocation ratio between the two layers has little effect on the H2S removal. After nine cycles, the produced gas’s H2S concentration can be lowered to 20 mg/m3. Our study recommends combining the Jia-2 and Jia-1 layers to build the Huangcaoxia underground gas storage. This plan can quickly reduce the H2S concentration of the produced gas to 20 mg/m3, thus meeting the gas export standards as well as the HSE (Health, Safety, and Environment) requirements in the field. This study helps the engineers understand the H2S removal for sulfur-containing UGS as well as provides technical guidelines for converting other multilayered sour gas fields into underground storage sites.

show abstract

Optimization of Injection and Production Parameters for Sour Gas Storages: A Case Study

Cited by 2 publications

References 13 publications

Study of the impact of injection parameters on the performance of miscible sour gas injection for enhanced oil recovery

Study of the impact of injection parameters on the performance of miscible sour gas injection for enhanced oil recovery

Simulation study of hydrogen sulfide removal in underground gas storage converted from the multilayered sour gas field

Contact Info

Product

Resources

About