In mid-late of oil field development, the most typical characteristics of reservoir is the vast nonuniform difference between the longitudinal and transverse,
With water injection and the modern way of oil displacement (thermal drive, chemistry drive, gas drive, etc.) have strong erosion to reservoir, increase the formation of reservoir’s heterogeneity, not only sand and water production in early well development affecting oil displacement efficiency, but also cause frequent accidents in the drilling process, drilling fluid performance is difficult to control and the cementing quality are also important reasons for that.
Good wellbore environment is the foundation of improving the cementing quality , settle inorganic solidified plugging agent near wellbore for the main purpose of implementing blocking layer, mainly highly permeable layer closure strips, improving near wellbore reservoir zone physical heterogeneity; secondly strengthening low pressure reservoirs, improve the bearing capacity.
-Only reduce the high penetration of the water layer strip, no blocking effect to the low permeability layer.
-After plugging, the cement residue on the wall helps cement slurry bond, help to improve the two cementing interface bond.
-After blocking temperature resistance reach more than 300 degrees.
-Solidification process will not be affected by the formation water mineralization degree.
-Formations resistance to pressure can be increased more than 10Mpa.
-No harm to the reservoir.
-Construction technology is simple
-An oilfield gas storage operation plugging old well, depleted oil and gas reservoirs due to low reservoir pressure (pressure coefficient 0.2), serious block job failed. Use this technology to block 38 wells. The pressure ability reached 15Mpa. It has high quality cement.
-An oilfield plug the drift sand layer, because the internal layer is water- rich, squeeze slurry escaped, we applied this technology to 15 wells, the pressure test all qualified.
-Adjustment of an oilfield drilling wells, because of the impact of high-pressure water-bearing stratum, after applying various measures to control water slurry performance with no effect, they test the technology in three wells. The cementing quality is good.