METHOD FOR PREPARING OIL AND GAS WELLS WITH HORIZONTAL COMPLETION FOR OPERATION Russian patent published in 2021 - IPC E21B23/08 E21B43/26 

FIELD: oil and gas industry.

SUBSTANCE: claimed method of preparation of oil and gas wells with horizontal completion for operation. The method includes directional drilling of wells with horizontal ends. Running a production string in a horizontal well completion. Anchoring the production casing using casing packers or cementing to form a cement stone. Conducting the first stage of hydraulic fracturing (HF) using a high-pressure HF pump, conducting field geophysical studies of the horizontal well completion in the production string by tripping operations of geophysical equipment. Running a multistage hydraulic fracturing assembly with a packer plug and cumulative perforating systems, performing subsequent HF stages. The first stage of hydraulic fracturing (HF) is carried out immediately after fixing the production string in the horizontal end of the well using a hydraulic coupling installed at the end of the production string and a high-pressure HF pump. The template is hydrotransported to the end of the well and the template is lifted, then the assembly with geophysical instruments is lowered by hydrotransportation until the end of the well using a HF pump. On the rise, field geophysical surveys are carried out, after which the subsequent stages of HF are carried out.

EFFECT: simplification and acceleration of operations for preparing oil and gas wells for operation, increase in productivity of the equipment used and reducing the time required.

1 cl, 5 dwg