中原油田探井保护油气层钻井液的评价及改进

探井钻井液性能是油气层保护技术一个重要部分，对油田的勘探开发起着举足轻重的作用。对水敏性地层要减少钻井液对油气层的伤害，必须控制钻井液的滤失量和低密度固相含量，匹配的降滤失剂一定要加足，同时必须控制好钻井液密度，保持平衡钻井。加强对探井钻井液的监测对保护油气层效果显著。

EVALUATION AND IMPROVEMENT OF DRILLING FLUID USED FOR RESERVOIR PROTECTION IN EXPLORATORY WELLS IN ZHONGYUAN OILFIELD,

Drilling fluid performance in exploratory wells is one important part in reservoir protection,it also plays an extreme role in oilfield development.For the water sensitive formation,in order to reduce the damage to reservoir,the filtration and low-density solids concentration have to be controlled,enough compatible filtrate reducer must be added.Meanwhile,the drilling fluid density must be controlled to have a balanced drilling.In addition,monitoring drilling fluid performance in exploratory wells will get positive results for reservoir protection.