Multi-objective optimization method for current limiting strength of horizontal well inflow control device (ICD)

Abstract

The invention provides a multi-objective optimization method for current limiting strength of a horizontal well inflow control device (ICD). The multi-objective optimization method includes building ahorizontal well ICD completion flow coupling model; taking the horizontal well yield and water breakthrough time variable coefficient as the objective function, setting constraint conditions and building an ICD current limiting strength multi-objective optimization model; solving the multi-objective optimization model through an NSGA-II algorithm to obtain the optimal solution set of the multi-objective optimization method; ranking according to the the distance from all solutions in the optimal solution set to the ideal optimal solution and the ideal inferior solution through the Topsis method, thereby acquiring the optimal solution of the current limiting strength of the horizontal well ICD .

Description

technical field [0001] The present disclosure relates to the technical field of drilling and completion, and in particular to a multi-objective optimization method for flow limitation strength of a horizontal well inflow control device. Background technique [0002] In recent years, with the development and maturity of drilling and completion technology, horizontal wells have been widely used in various reservoirs and achieved good development results. Due to the long travel distance of the horizontal well in the reservoir, the heterogeneity of the reservoir physical properties in the horizontal section, the difference in the water avoidance height and the heel-toe effect of the horizontal wellbore flow, etc., the production pressure difference and water breakthrough time of the wellbore are different, so It leads to premature breakthrough of bottom water and local large-scale sand production, which seriously affects the productivity of horizontal wells and the comprehensive...

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Problems solved by technology

[0003] At present, the ICD current limiting intensity design methods used at home and abroad mainly focus on the single-objective optimization of increasing the productivity of horizontal wells. The objective function often selects the recovery rate or the net present value, and the optimized results often only obtain higher production, while Neglecting the need to control water and sand in horizontal wells

At the same time, there is no design method for the ICD current limiting strength of horizontal wells that takes into account both sand control and water control requirements.

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