摘要
探讨了高原气藏钻井过程中酸性气侵入量的计算问题,建立了酸性气侵入量与各影响因素的关系方程。通过实例计算,结果表明,硫化氢和二氧化碳侵入量随钻速提高而增大,随泵排量增大而减少,随井眼尺寸增大而增多;酸性气的地层分压越大,侵入量越大;地层温度越高,侵入量越少;地层岩石孔隙度越大,侵入量越大。现场应用时应根据实际地层参数和钻井参数来计算酸性气侵入量。
The calculation of acidic gas invasion rate in plateau gas reservoir drilling was discussed,a correlation equation for calculating the invasion rate and its influential factors was derived.Through case calculation result indicates that H2S and CO2 invasion rates increase with the increase of penetrate rate and decrease with the increase of pump discharge,and raise with the increase of wellbore size;the higher the formation fractional pressure was,the higher the higher the invasion rate would be;the higher the formation temperature was the less the invasion rate was;the higher the rock porosity was,he higher the higher the invasion rate would be.In field application,acidic gas invasion rate should be calculated according to actual formation parameters.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2010年第6期171-172,共2页
Journal of Oil and Gas Technology
关键词
气藏
酸性气体
侵入量
钻井液污染
评价
gas reservoir
acidic gas
invasion rate
damage of drilling fluid
evaluation
