Analysis Of The Influencing On The Extension Limit Of A Horizontal Wells With Ultra-Long Horizontal Sections

Fang Shi; Qingshan Xiong; Shuaishuai Wang; Hao Geng; Ke Wang; Yu Liu

doi:10.6180/jase.202311_26(11).0013

Analysis Of The Influencing On The Extension Limit Of A Horizontal Wells With Ultra-Long Horizontal Sections

Fang Shi This email address is being protected from spambots. You need JavaScript enabled to view it.¹, Qingshan Xiong¹, Shuaishuai Wang², Hao Geng¹, Ke Wang¹, and Yu Liu¹

¹School of petroleum engineering, Yangtze University, Wuhan 430100, China
²College of Safety and Ocean Engineering, China University of Petroleum, Beijing 100082, China

Received: September 13, 2022
Accepted: January 13, 2023
Publication Date: March 15, 2023

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202311_26(11).0013

ABSTRACT

Compared to conventional vertical wells, horizontal wells with Ultra-Long horizontal sections greatly increase the oil drainage area and can significantly increase oil and gas production from individual wells. In order to analyze the limit of horizontal well extension, an extension limit model was developed, which takes into account formation, rated pump pressure, rated pressure and string buckling, and is used to predict the limit of horizontal well extension under different constraints. The results show that increasing the inside and outside diameter of drill pipe can effectively reduce pressure loss and facilitate the extension of the horizontal section while keeping the hole size unchanged. As the cuttings density, cuttings diameter, mud density, mud performance, pump rates, and ROP increase, the limit extension length of the horizontal section gradually decreases. As the WOB, RPM, friction factor increase, the torque gradually increases and the limit extension length of the horizontal section gradually decreases. Selecting the right combination of drilling tools can reduce the torque, which is beneficial for mechanical extension. This study is instructive for the limit of horizontal well extension with ultra-long horizontal sections in the field.

Keywords: Ultra-long horizontal well; Horizontal well; Extension limit; Pressure losses; Pipe-string buckling

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