CAJ | 학술논문

渤海油田多高渗储层，修井过程中易发生修井液大量漏失，修井液进入地层后若与储层配伍性差，修井液中的聚合物难于降解，常常引起储层伤害，导致修井后产量降低。因此，要求修井液应具备强的封堵能力和易降解特性。考虑修井作业时间对降解速度的要求，从热降解和生物酶降解角度出发，研制出了双降解修井液体系。评价结果表明，该体系封堵能力强，热降解性和生物降解性好，具有较好的储层保护效果。
발해유전다고삼저층，수정과정중역발생수정액대량루실，수정액진입지층후약여저층배오성차，수정액중적취합물난우강해，상상인기저층상해，도치수정후산량강저。인차，요구수정액응구비강적봉도능력화역강해특성。고필수정작업시간대강해속도적요구，종열강해화생물매강해각도출발，연제출료쌍강해수정액체계。평개결과표명，해체계봉도능력강，열강해성화생물강해성호，구유교호적저층보호효과。
Most of Bohai oilfield reservoirs are high permeability ,and leakage often occurs in the process of workover .If the compatibility of workover fluid flowing into layer with reservoir is poor , and polymer in workover fluid is hard to degrade ,which will cause reservoir damage and reduce the output after workover .Therefore workover fluid is required with high seal capability and easy degrad‐ability .Considering the requirement of degradation rate from workover time ,and starting with ther‐mal‐degrade and bio‐enzyme degrade ,dual‐degrade workover fluid system was developed in this pa‐per .The indoor evaluate results indicate that this workover fluid system has strong seal capability , good thermal‐degradation and bio‐enzyme degradation ,and the reservoir protection effect is also bet‐ter .