摘要
利用单井吞吐注气技术,解决衰竭式开发低渗气藏反凝析污染问题。以安岳气藏岳101井为研究对象,运用数值模拟方法,以吞吐注气前后开采效果为评价标准,优选该井吞吐注气最优参数。研究表明:注入气体对油相"抽提"作用及"气驱油"效应是解除低渗凝析气藏反凝析污染的重要机理;以最优参数注气,可使天然气采出程度增加2.794%,凝析油采出程度增加0.468%。研究成果对高效开发此类凝析气藏有重要的借鉴意义。
Single well gas puff and huff can effectively remove the retrograde condensation pollution around the well in the process of depletion development in low-permeability condensate gas reservoir. Taking Well Yue101 in Anyue gas reservoir as an example, the numerical simulation is applied to analyze the productivity before and after puff and huff,and then to chose the optimal parameters thereof. The results suggest that the oil'lifting'by injected gas and'gas-drive oil'effects are major mechanisms to relieve the retrograde condensation pollution in low-permeability condensate gas reservoir; gas injection with the optimal parameters impels the natural gas and condensate oil recoveries to rise by 2. 794% and 0. 468% respectively. The results can guide effectively the development of similar low-permeability condensate gas reservoirs.
出处
《特种油气藏》
CAS
CSCD
北大核心
2013年第6期84-88,145,共5页
Special Oil & Gas Reservoirs
基金
高校博士点基金项目“高温高压多组分凝析气非平衡相态理论模型研究”(20115121110002)
关键词
低渗凝析气藏
相态恢复
干气吞吐
参数优化
数值模拟
安岳气田
low-permeability condensate gas reservoir
phase recovery
gas puff and huff
parameters optimization
numerical simulation
