番禺30-1气田修井储层保护工艺优选

Optimization of Reservoir Protection Technology for Workover in Panyu 30-1 Gas Field

随着番禺30-1气田生产进入中后期,面临油藏压力降低、水侵、水淹、管柱腐蚀等问题,影响气井生产,需要进行修井作业,而压力亏空气井修井存在修井液大量漏失的风险,易造成储层伤害,导致气井复产困难等问题。通过研究修井储层保护技术,结合番禺30-1气田特点,推荐使用膨胀桥塞临时封隔储层工艺,避免修井液接触地层,最大限度地保护储层,并制定临时封隔储层作业程序,为番禺30-1气田修井作业提供指导和借鉴。

With the production of Panyu 30-1 gas field entering the middle and later stage,problems such as reservoir pressure reduction,water invasion,water flooding and string corrosion,etc.,affect the production of gas wells,so it is necessary to carry out workover.However,there is a risk of loss of workover fluid in pressure deficit gas well,which is easy to cause reservoir damage and leads to difficulties in gas well recovery.Based on the study of reservoir protection technology in workover,combined with the characteristics of Panyu 30-1 gas field,the temporary reservoir isolation technology is recommended to avoid workover fluid contacting the formation and protect the reservoir to the maximum extent.The operation procedure of temporary reservoir isolation is formulated to provide guidance and reference for workover in Panyu 30-1 gas field.