Method for sand control of oil well

Abstract

The invention discloses a method for sand control of an oil well. The method comprises: 1) using a derrick to place sand control strings down in an oil well, making the sand control strings reach 9-11 m above an oil layer; installing a well head device on a wellhead; 2) connecting a pump truck which is used to convey sand-preventive materials with the well head device through surface equipment; 3) making an oil pipe to extrude forward a prepad fluid, so that the prepad fluid and a low-temperature curing accelerator are squeezed to a stratum which needs sand control; 4) making the oil pipe to extrude forward the sand-preventive materials, so that the sand-preventive materials carried by a sand-carrying fluid are squeezed to the stratum which needs sand control; 5) making the oil pipe to extrude forward a displacing fluid, so that the sand-preventive materials are fully squeezed to the stratum, preventing excessive residue of the sand-preventive materials in a shaft; 6) and shutting the well for 2-3 days, so that the sand-preventive materials are solidified in the stratum. The method for sand control of an oil well can make the stratum solidified, prevents collapse and even scrapping of the oil well, and ensures smooth oil exploitation.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, and more specifically relates to an oil well sand control method. Background technique [0002] With the development of society, oil has become more and more closely related to people's production and life. [0003] In the process of oil extraction, it is necessary to drill a well first, and use the oil pipe to extract the oil in the oil well after the drilling is completed. At present, due to the different properties of the strata in different regions, sand slide may occur in the part of the strata in some areas that is in contact with the oil, resulting in a serious deficit and collapse of the stratum, and even the scrapping of the oil well, which seriously affects the normal extraction of oil by the tubing. [0004] To sum up, how to provide a sand control method for oil wells to solidify the formation and ensure the normal progress of oil production when the oil well is found to hav...

AI Technical Summary

Problems solved by technology

At present, due to the different properties of the strata in different regions, sand slide may occur in the part of the stratum in some areas that is in contact with the oil, resulting in a serious deficit and collapse of the stratum, and even the scrapping of the oil well, which seriously affects the normal extraction of oil by the tubing.

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