龙凤山凝析气藏气井合理配产研究

Reasonable production of wells in Longfengshan Condensate Gas Field

龙凤山凝析气藏为一受岩性物性控制的特低渗凝析气藏,储层属特低孔、特低渗储层;孔喉结构复杂,属中孔、微-细喉道。地露压差小,凝析油含量高,极易发生反凝析伤害及井筒积液。如何科学、合理的确定单井合理产量,既满足天然气开发需求,又有效防止井筒积液显得十分重要。本文综合运用无阻流量、采气指数法、临界携液流量法和数值模拟法确定单井合理产量。通过优化气井配产,延长气井稳产期,提高单井开发效益。

Long Fengshan condensate gas reservoir is a controlled by the lithology and property of low permeability condensate gas reservoir, the reservoir has low porosity, low permeability reservoir. Pore structure is complex, belongs to the hole and micro - fine throat, the difference between Formation pressure and dew pressure is small, the content of condensate oil is high, reverse condensate damage and wellbore fluid easily happened. How to determinate of single well production scientific and reasonable, meeting the demand of natural gas development and preventing wellbore fluid effectively are very important. This article use open flow potential ,productivity index method, the critical flow rate method and the numerical simulation method to determine the reasonable single well production. By optimizing the gas well proration and prolong the gas well production plateau, improve the efficiency of the single well development.