新疆尼勒克地区煤层气井钻井复杂处理技术——以HDCS-2井为例  

Complex processing technology for coalbed methane wells in Nileke area,Xinjiang:Taking Well HDCS-2 as an example

作　　者：王虎 胡永 朱迪斯 WANG Hu;HU Yong;ZHU Disi(Xinjiang Yaxin Coalbed Methane Investment and Development(Group)Co.,Ltd.,Urumqi Xinjiang 830063,China;Oil&Gas Survey,China Geological Survey,Beijing 100083,China;State Key Laboratory of Continental Shale Oil,Beijing 100083,China;The Key Laboratory of Unconventional Petroleum Geology,China Geological Survey,Beijing 100083,China)

机构地区：[1]新疆亚新煤层气投资开发(集团)有限责任公司,新疆乌鲁木齐830063 [2]中国地质调查局油气资源调查中心,北京100083 [3]多资源协同陆相页岩油绿色开采全国重点实验室,北京100083 [4]中国地质调查局非常规油气地质重点实验室,北京100083

出　　处：《钻探工程》2025年第2期20-27,共8页Drilling Engineering

基　　金：中国地质调查局地质调查项目“西部重点盆地油气地质调查与评价”(编号:DD20240044)、“重点参数井钻探及配套技术应用”(编号:DD20242400)。

摘　　要：HDCS-2井是部署在伊犁盆地尼勒克坳陷的一口煤层气参数井+生产试验井,钻井实施过程中通过优化钻井液参数、高黏钻井液洗井、爆炸松扣等技术措施,解决了长裸眼煤系地层坍塌掉块、提下钻具遇阻、埋钻等钻井复杂问题,保障工程顺利完钻并实现地质目的。利用HDCS-2井岩样进行了岩石矿物分析测试和扫描电镜观察并基于测井资料构建了三压力剖面,分析了井壁失稳的机理,提出如下改进措施:采用三开井身结构;采用高切力防塌钻井液体系;掉块时可配制高黏钻井液(滴流)进行洗井;慢速起下钻;优化钻具组合,煤系地层钻进中配置随钻震击器。对该区域深部煤层气钻井工程实施具有重要实践指导意义。HDCS-2 well is a coalbed methane parameter well and production test well deployed in the Nileke Depression of the Ili Basin.Through optimizing drilling fluid parameters,high viscosity drilling fluid flushing,explosive loosening and other technical measures,the drilling complexity problems are solved including block falling,drilling tool obstruction during the tripping,and buried drilling in long open hole of the coal bearing strata,ensuring the completion of the project and the achievement of the geological objectives.Rock mineral analysis testing and scanning electron microscopy observation were conducted using samples from Well HDCS-2,and a three pressure profile was constructed based on logging data to analyze the mechanism of wellbore instability.Improved measures for subsequent projects are suggested as follows:three-section well configuration and a high shear anti collapse drilling fluid system should be adopted,high viscosity drilling fluid(drip)can be configured for well flushing when encounteres falling blocks in the well,slow drilling and tripping,optimizing the drilling tool assembly as well as equip drilling vibration hammer during drilling in coal bearing strata.The study can provide valuable practical guidance for subsequent coalbed methane drilling in the region.

关 键 词：煤层气井 井壁稳定 钻井复杂 钻井液 三压力剖面 

分 类 号：TE28[石油与天然气工程—油气井工程] P634.8[天文地球—地质矿产勘探]