低密度低滤失气井压井液的体系研制

摘要

Aiming at low-pressure gas bearing reservoir in Jilin and Honggang,reservoir temperature low 50℃, study of low density water external emulsionof well control fluid, take water as external phase and 0# diesel oil as internal phase, filter out emulsifier of good emulsifying power and fluid loss control agent, determine the formula of the well control fluid, and evaluate its performance. The result of experiment indicates that the the well control fluid has low filtration property and good stability, through the core of permeability experiment can reach this conclusion, that well control fluid has tiny damages to gas bearing formation.%针对吉林松原和红岗低压区块,压力系数小于1,储层温度为50℃以内,研究出低密度超低伤害水包油型气井压井液.以水为外相,0#C柴油为内相,选用实验室研制的具有良好乳化能力的乳化剂和降滤失剂,确定了压井液的配方.实验结果表明,此气井压井液具有良好的低滤失性、稳定性.通过对气层岩心的渗透率实验可以得出此压井液对气层伤害极小.