定向井气体钻井注气量影响因素分析

Analysis of Influencing Factors of Gas Injection in Directional Gas Drilling

目前定向井气体钻井的发展在国内处于停滞状态,主要原因是由于对不同井段注气量的优选困难。本文通过对不同因素对定向井气体钻井的影响分析研究,得出不同岩屑直径、井斜角、井眼粗糙、岩屑内摩擦系数、迎风面积等对定向井气体钻井最小注气量的影响规律。对实际定向井气体钻井最小注气量的优选起到知道作用。

The development of directional gas drilling is at a standstill in China at present, and the main reason is due to the difficulty of determining the injection volume of gas in different well sections. This paper analyzes the influence of different factors on the directional gas drilling, and proposes the influence rules of different cuttings diameter, well angle, wellbore roughness, internal friction coefficient and wind- ward area on the minimum gas injection volume for the directional gas drilling. It will help to obtain the optimal minimum gas injection volume for actual directional gas drilling.