井筒积液对储层伤害及产能的影响  

Effect of Liquid Loading on Reservoir and Productivity

作　　者：田巍[1] 杜利[1] 王明[1] 韩加芳 朱维耀[3] 

机构地区：[1]中国石化中原油田分公司,河南濮阳457001 [2]台玻集团天津玻璃有限公司,天津301609 [3]北京科技大学,北京100083

出　　处：《特种油气藏》2016年第2期124-127,157,共4页Special Oil & Gas Reservoirs

基　　金：国家重点基础研究发展计划("973"计划)"页岩气多场耦合非线性渗流理论研究"(2013CB228002)

摘　　要：为了定量研究井筒积液对低渗透致密气藏储层伤害程度,设计了井筒积液伤害实验评价物理模拟方法,利用某气田真实岩心开展了实验研究,并分析了井筒积液对产量的影响程度。结果表明:岩心在反向注入一定体积的工作液后,造成渗透率不同程度的降低,初期渗透率伤害率和最终渗透率伤害率分别为44.79%和28.69%;正向通气后渗透率仍不能恢复到注液前的状态,渗透率低的岩心受到伤害较严重;在较低的含水饱和度变化区间上,渗透率变化率下降的幅度较大;井筒积液污染储层造成产能下降幅度达到31%。井筒积液的影响不可忽视,油气田生产现场应该制订合理的开关井生产制度,这对于油气田的持续高效开发具有重要的现实意义。A laboratory physical simulation experiment is designed to quantitatively evaluate the damage of liquid loading on low-permeability tight gas reservoir. The natural core samples in a certain gasfield are used to carry out the reservoir damage experiment and analyze the effect of liquid loading on production. Result illustrates that the permeability of core samples decreases in various degree after reverse injection for a certain volume of experimental fluid. The average initial and final permeability damage ratios are 44. 79% and 28. 69% respectively. The permeability could still recover to the initial value after forward ventilation and the core samples with relatively low permeability are relatively seriously damaged. The permeability gradient greatly decreases in a relatively lower water saturation interval. The productivity is decreased by 31% due to reservoir damage results from liquid loading. It is of great necessity to take liquid loading into account and develop a reasonable field open-shut production system,which is favorable to achieve sustainable and efficient development.

关 键 词：井筒积液 渗透率伤害率 渗透率可恢复率 含水饱和度 产能 低渗致密砂岩气藏 吐哈盆地 

分 类 号：TE37[石油与天然气工程—油气田开发工程]