压裂液用绒囊暂堵剂实验研究

由于绒囊暂堵剂在钻完修井及煤层气勘探开发中的暂堵作用得到应用,本文针对绒囊暂堵剂在压裂暂堵方面进行研究;通过对绒毛剂、成膜剂、成核剂的筛选,选定0.3%的绒毛剂A、浓度超过0.1%成膜剂及0.3%成核剂6为优选的绒囊暂堵剂浓度及材料;并对绒囊暂堵剂与压裂液及压裂液添加剂配伍进行及破胶性评价,绒囊暂堵剂与压裂液及添加剂配伍并不影响压裂液冻胶的破胶性;通过细管摩阻实验发现绒囊暂堵剂比清水有更高的摩阻压差。

Experimental Study on the Wool Bursa Temporary Plugging Agent Used in Fracturing Fluid

Due to application of the temporary plugging effect of the wool bursa temporary plugging agent into drilling, completion and work-over of wells and exploration and development of CMB, performance of the wool bursa fracturing temporary plugging agent for the temporary plugging was studied. By screening villi agent, film former and nucleating agent, the villi agent A with density of 0.3%, the film former with density over 0.1% and the nucleating agent 6 were selected as preferred materials for preparing the wool bursa temporary plugging agent. The compatibility of the wool bursa temporary plugging agent with the fracturing fluid and the fracturing fluid additives was evaluated based on its gel breaking performance. As a result, the gel breaking performance of the gel fracturing fluid is not affected by whether the wool bursa temporary plugging agent is combined with the fracturing fluid and additives. A narrow tube friction experiment has proved that the wool bursa temporary plugging agent has higher friction pressure difference than water.