筛管完井水平井酸洗管柱改进与应用

Improvement and application of acid-cleaning strings in screen completion horizontal wells

伊西锋 高斯 田启忠

YI Xifeng GAO Si TIAN Qizhong

胜利油田公司采油工艺研究院，山东东营　257000 胜利油田公司油气集输总厂，山东东营　257000

Oil Production Technology Research Institute, Shengli Oil.eld Company, Dongying 257000, China Oil and Gas Gathering &

筛管完井水平井酸洗是解除裸眼段钻井液污染的有效措施，酸洗效果的优劣对油井的产能有着直接的影响。胜利油田前期的酸洗管柱存在着洗井阀关闭不严、洗井封隔器密封效果差、无泄流通道等问题，直接导致了水平井的酸洗效果差。对水平井酸洗管柱进行了针对性的改进，完善了洗井阀的密封结构，设计了带泄流通道的洗井封隔器，改善了酸洗的效果，有效地提高了筛管完井水平井的产能。

Acid-cleaning technology of screen completion horizontal well is an effective measurement for cleaning the drilling fluid pollution in bore hole, and the acid-cleaning effect directly affects the well productivity. The early stage of acid-cleaning strings in Shengli oilfield has some deficiencies such as incompletely sealed well-washing valve, poor sealing effect of well washing packer and no drainage channels. Such problems directly caused poor acid-cleaning effect on horizontal wells. The acid-cleaning strings were specific modified and the sealing structure of washing valve was improved in this paper. And then well-cleaning packer equipped with flow path was developed. The new technology improves acid-cleaning performance and effectively enhances well productivity of screen completion horizontal wells.