Predictive Method and its Application of Pressure Drop in Horizontal Wellbore Completion String with Sliding Sleeves

doi:10.3969/j.issn.1006-6535.2024.02.019

Abstract

Abstract: To address the challenge of predicting inflow dynamics in horizontal completion string with sliding sleeves,oil-water single-phase flow tests were conducted inside the wellbore of completion string with sliding sleeves under different mainstream and inflow conditions using a self-developed physical simulation device for production wellbore flow.Calculation formulas for hydraulic friction coefficients and pressure drop equations in the wellbore with sliding sleeve completion string were established.The relationship between wellbore pressure drop distribution and inflow dynamics was studied, and the methods were applied in Panyu Oilfield.The results indicate that for completion string with sliding sleeves,the additional resistance generated by sliding sleeve openings and inflow from perforations is significantly greater than the resistance from the sliding sleeve openings alone,accounting for approximately 10% to 70% of the total pressure drop.Under laminar flow conditions,both sliding sleeve openings and inflow from perforations hinder the mainstream flow in the wellbore.Under hydraulic flow conditions, sliding sleeve openings hinder the flow, while inflow from perforations reduces resistance.The established expressions for hydraulic friction coefficients and pressure drop equations have an error of less than 1.00%,which can effectively characterize the additional resistance caused by factors such as sliding sleeve openings and inflow from perforations.The research findings can be utilized to predict inflow performance of well and provide guidance for adjusting the opening of sliding sleeves in completion string.

Key words: completion string with sliding sleeves, inflow performance, wellbore pressure, pressure drop equation, Panyu Oilfield.

CLC Number:

TE21

Zeng Quanshu, Hao Xining, Sui Tianyang, Xu Liangbin, Wang Zhiming, Gao Wenlong. Predictive Method and its Application of Pressure Drop in Horizontal Wellbore Completion String with Sliding Sleeves[J]. Special Oil & Gas Reservoirs, 2024, 31(2): 159-165.

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