水平井钻井具备的基本地质条件及工艺

Basic Geological Conditions and Technology for Horizontal Well Drilling

自2004年亚美大陆煤层气有限公司在大宁煤矿成功完成第一口我国煤层气水平井以来,我国已施工水平井60余口,水平井的施工即有成功的,煤层气一般为1×104m3/d～2×104m3/d;失败的例子也履见不鲜。本文结合煤层气开发中需要具备的近22个基本评价参数,总结了水平井钻井在煤层气开发中的适合条件。其目的是为了更好地使水平井钻井成井工艺在煤层气开发中发挥其作用,提高煤层气田的产能。

Since the first horizontal CBM well was successfully drilled by Asian American gas, Inc. in Darting coal mine in China in 2004, China has drilled more than 60 horizontal wells. Some horizontal wells have been drilled successfully, and the gas production varies from 1×10^4m^3/d-2×10^4m^3/d. There are also some examples of failure. The paper describes nearly 22 parameters for basic evaluation in development of CBM. It indicates the adequate conditions for drilling horizontal wells in development of coalbed methane. The purpose of the paper is to play the full role of horizontal well technology in development of CBM, to improve the production capacity of coalbed methane filed.