摘要
西藏当雄县羊易超高温地热井田具备了利用地热能发电的有利条件。该区钻孔井底温度最高达350℃、压力4~11 MPa,水蒸汽喷出井口达80m。针对高温高压对测井,采用井口热储防喷器防止井喷事故。利用高温高压测量仪器分别进行4次测量,即:静态测试、90m3/h蒸汽流量的动态测试、放喷8h后仪器井底静置2h后的静态测试、及再第三次静测之后2h的静态测量。对比4次测试数据发现:井底压力在第一次静态测量时最大,为3.415MPa;放喷8h后井底静止2h的静态观测最小,为3.346MPa。4次测量的井底温度相差不大,但井口温度差别较大,第3次最小,67.091℃,第4次最大,为95.307℃。数据对比表明放喷蒸汽对井内压力和温度存在一定的影响。
The Yangyi ultrahigh temperature geothermal field in the Damxung County,Tibet has been provided with favorable conditions for geothermal power.The maximum borehole bottom temperature can be 350oC as high,with pressure 4~11MPa,the steam blowout height can be 80m high above wellhead.Aimed at high temperature and high pressure impacts on well logging,the wellhead thermal reservoir BOP is used to prevent blowout.Through high temperature and high pressure measuring device carried out 4 measurements namely:static test,90m 3/h steam flow dynamic test,static test after 8 hours blowout and 2 hours device well bottom standing,and then the final static test 2 hours after the third static test.Comparison of the data from the 4 tests has found that the maximum bottom well pressure is from the first static test-3.415MPa;the minimum is from the after 8 hours blowout and 2 hours device well bottom standing static test-3.346MPa.The differences in well bottom temperature 4 measurements are not large;but larger in wellhead temperature test;the minimum is from the third test-67.091℃,maximum is from the fourth test-95.307℃.The comparison of tested data has shown that the steam blowout has certain impact on the well internal pressure and temperature.
作者
吴岑宏
Wu Cenhong(Well Logging Company,Jiangsu Changjiang Geological Survey,Nanjing,Jiangsu 210046)
出处
《中国煤炭地质》
2018年第4期70-73,共4页
Coal Geology of China
关键词
超高温地热
防喷器
PT测试
静态测试
动态测试
ultrahigh temperature geothermal energy
BOP
PT test
static test
dynamic test
