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国内最深页岩气井在江安完钻
2017-08-22 07:23:12 中国青年网
市州党报互动台
本报讯 (宜宾日报记者 郑兴隆 王黎)8月21日,记者从宜宾市获悉,国内最深页岩气井于8月1日12时许在宜宾江安县金家滩村完钻,深度为6095米,刷新了此前在重庆市大足区雍溪镇创造的6038米国内最深页岩气水平井纪录,并创出川渝地区页岩气井底温度高达145℃、国内自主研发的油基钻井液在井浸泡时间长达3534.96小时两项新纪录,把中国页岩气勘探推向了一个新高度。
此次刷新纪录的泸202井于今年2月24日开钻,设计井深6080米,水平段1500米。
泸202井参考资料几乎为零,水平段面临着地层复杂、密度窗口窄、井底温度高达145℃等多重难题。项目单位川庆钻井液公司科研人员在水平段采用自主研发的油基钻井液钻进头,同时通过150余套实验,优化了相关性能指标,确保该井顺利钻进。
“与其它页岩水平段钻井相比,这口井温度高达145℃,钻井液密度最高达2.39克/立方厘米,加之地层复杂、钻时较慢、周期较长,钻井液的浸泡时间长达3534.96小时而井内没有发生垮塌和掉块,这对于稳控钻井液性能,是不小的考验。”川庆钻井液公司页岩气项目经理部副经理彭碧强介绍,该井的钻成,对后续该区块的页岩气井积累了丰富技术资料,填补了“泸字头”区块空白,将为我国以后的页岩气超深井钻探工作提供技术蓝本。
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