无固相弱凝胶钻井完井液在南堡油田的应用  

The Application of Solids-free Weak Gel Drill-in Fluid in Block Nanpu

作　　者：张立民[1,2] 赵亚宁[2] 卢淑芹[2] 秦博[2] 

机构地区：[1]西南石油大学机电工程学院 [2]中国石油冀东油田钻采工艺研究院

出　　处：《钻井液与完井液》2010年第2期81-83,共3页Drilling Fluid & Completion Fluid

基　　金：国家科技重大专项滩海油气田高效开发技术(2008ZX-05015-002)资助

摘　　要：南堡油田勘探开发以滩海开发为主,为了更好地发现和保护油气层,并满足滩海安全环保要求,研究应用了无固相弱凝胶钻井完井液。该钻井完井液携岩效果好、抑制性强、能自降解、不需混油、无荧光,既能满足地质录井要求,又具有良好的油层保护效果,与其配套的破胶、酸洗等无固相完井液技术配合应用,较好地解决了南堡油田储层保护和安全环保的问题。经南堡油田21口井的应用,岩心回收率大于93%,渗透率恢复值大于95%,初期平均日产油大于80t,是相邻区块同层井的2.7倍,实现了南堡滩海良好勘探开发。A solids-free weak gel drill-in fluid was developed for use in Block Nanpu in an effort to protect the reservoir from being damaged and to protect the environment of the beach. This drill-in fluid has the advantages of good carrying capacity,strong inhibitive capacity,self-degradation,fluorescence-free,and good performance in reservoir protection. No oil is needed for this fluid,thus is suitable for use in beach area. The application of this drill-in fluid in 21 wells in Block Nanpu shows that core length recovery averages to 93%,and core permeability recovery 95%. Initial average daily oil production rate is 80 t,2.7 times that of offset wells in adjacent blocks.

关 键 词：钻井完井液 防止地层损害 无固相弱凝胶 环境保护 

分 类 号：TE254.3[石油与天然气工程—油气井工程]