Modeling of Sulfur Deposition Damage in the Presence of Irreducible Water

作者：Hu, J. -H.^*; He, S. -L.; Zhao, J. -Z.; Li, Y. -M.; Deng, Y.

来源：Petroleum Science and Technology, 2011, 29(5): 499-505.

DOI：10.1080/10916461003663008

• deposition
• elemental sulfur
• irreducible water saturation
• non-Darcy flow
• prediction

With the decreasing of pressure and temperature, elemental sulfur may deposit and cause a decline in reservoir permeability. In this work, an elemental sulfur agglomeration mechanism and the effect of irreducible water on agglomeration were analyzed. A prediction model on sulfur deposition in the presence of irreducible water was proposed based on non-Darcy flow. The result shows that sulfur deposition damage mainly occurs near the wellbore, and irreducible water has a direct effect on sulfur particle agglomeration. When reservoir pressure is lower than the saturation pressure of elemental sulfur, precipitated sulfur block pore and decrease permeability, higher saturation degree of irreducible water lead to plug seriously, gas limited production time become shorter when non-Darcy flow is considered and productivity decline velocity become more quickly.

• 出版日期2011
• 单位中国地质大学（北京）; 西南石油大学; 中国石油大学（北京）