Branch horizontal well recovery method based on slippage coefficients

Abstract

The invention discloses a branch horizontal well recovery method based on slippage coefficients. The branch horizontal well recovery method specifically comprises the following steps that first, a theoretical value of shale gas output of a branch horizontal well is calculated; and second, production of actual daily output of the branch horizontal well is conducted according to the theoretical value, a graph of the actual daily output of the branch horizontal well and time is drawn, the actual daily output of the branch horizontal well is adjusted to a stop jump point from occurring until no jump point occurs when the jump point occurs on the graph, and the branch horizontal well is scrapped when accumulated water output is equal to critical water output. According to the branch horizontal well recovery method based on the slippage coefficients, adjustment is conducted after the jump point is generated, carrying of production water in the branch horizontal well through the shale gas in time is facilitated, the damage that an air-water mixture returns to the well bottom is reduced, gathering of the production water at the well bottom is reduced, and thus the maintenance charge is reduced, efficiency is high, and maintenance cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of shale gas exploitation operations, and relates to a method for exploiting branched horizontal wells based on slippage coefficient. Background technique [0002] In shale gas development, drilling branch wells on the basis of horizontal wells can increase the length of the target layer, increase the oil drainage area, and increase oil and gas production. The technology is developing rapidly and has entered the stage of large-scale application. At present, branched horizontal well technology is an effective means of exploiting shale gas reservoirs. In the exploitation of shale gas wells, in order to obtain the maximum cumulative production, generally, one method is to control the pressure at the bottom of the horizontal well of the gas well, and the other method is to control the wellhead flow rate of the gas well to be constant. [0003] However, the existing shale gas branched horizontal well production...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a branched horizontal well mining method based on the slippage coefficient, which solves the existing shale gas branched horizontal well development problem that the formation water at the bottom of the horizontal well blocks the shale gas with the prolongation of the production time. Gas flow passages, a problem that reduces the development life of gas wells

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