摘要
海拉尔盆地呼和湖凹陷煤层薄,煤阶低,以褐煤为主,给取芯工作带来很大难度,常规绳索取芯技术已不符合该地区煤层气参数井钻进要求,因此根据呼和湖凹陷地质特征,优选适宜的绳索取芯钻具结构及技术措施。
Coal in Huhe lake depression of Hailaer Basin is mainly low rank lignite occurred in thin coal seams, which brings about great difficulties in coring. The conventional wire line technique can not meet the requirements for drilling CBM parameter well within this region. Therefore, the structure of wire line coting tool and the adequate technical measures have been selected in accordance with the geolog ical characteristics of Huhe lake depression.
出处
《中国煤层气》
2012年第5期20-23,共4页
China Coalbed Methane
关键词
低煤阶
褐煤
绳索取芯
Low rank coal
lignite
wire-line coring
