超细水泥在子洲气田分段封堵技术中的现场应用

Field application of superfine cement in Zizhou gasfield plugging technology

气井永久性封堵一般采用G级水泥,但G级水泥由于颗粒径较大,一般只适用于渗透率较高的储层,而对低孔低渗储层其封堵效果较差。根据相关试验性研究数据,利用超细水泥可有效侵入致密砂岩的特点,开展子洲气田气井永久性封堵作业,从而达到有效封堵储层的目的。

The permanent plugging of gas wells usually adopts G grade cement,but G grade cement particle size is bigger,it is only suitable for reservoirs with high permeability,for low porosity and low permeability reservoir,the plugging effect is poor.According to the experimental data,the characteristics of superfine cement can be applied to the compact sandstone,using the superfine cement＇s characteristics of effective intrusion in tight sandstone,carried out permanent plugging wells in Zizhou gasfield,so as to achieve the purpose of effectively plugging the reservoir.