顺北碳酸盐岩裂缝性气藏安全钻井关键技术  

Key Technologies for the Safe Drilling of Fractured Carbonate Gas Reservoirs in the Shunbei Oil and Gas Field

作　　者：王建云[1] 杨晓波 王鹏[1] 范红康[3] WANG Jianyun;YANG Xiaobo;WANG Peng;FAN Hongkang(Engineering Technology Management Department,Sinopec Northwest Oilfield Company,Urumqi,Xinjiang,830000,China;Asset Management Centre,Sinopec Northwest Oilfield Company,Urumqi,Xinjiang,830000,China;Sinopec Research Institute of Petroleum Engineering,Beijing,100101,China)

机构地区：[1]中国石化西北油田分公司工程技术管理部,新疆乌鲁木齐830000 [2]中国石化西北油田分公司资产管理中心,新疆乌鲁木齐830000 [3]中国石化石油工程技术研究院,北京100101

出　　处：《石油钻探技术》2020年第3期8-15,共8页Petroleum Drilling Techniques

基　　金：中国石化科技攻关项目“特深层油气钻井工程关键技术与工具”(编号:P17049-3);“顺北油气田一区优快钻井技术研究”(编号:P18021-1)部分研究内容。

摘　　要：为了解决顺北油气田碳酸盐岩裂缝性气藏钻井过程中溢流和漏失同存的问题,保证钻井安全,分析了其溢流和漏失同存的原因,制定了首先暂堵裂缝阻止气体侵入井筒、然后在气体侵入井筒的情况下控制气体侵入量和上窜速度以保证钻井安全的技术思路,并将裂缝性气藏暂堵技术、控压钻井技术和高温气滞塞技术进行集成,形成了顺北碳酸盐岩裂缝性气藏安全钻井关键技术。应用该关键技术时,先用裂缝性气藏暂堵技术阻止气体进入井筒;发现气体侵入井底时,用控压钻井技术控制气体侵入量;气体侵入井筒的情况下,用高温气滞塞技术降低气体上窜速度,保障钻井安全。顺北油气田在应用碳酸盐岩裂缝性气藏安全钻井关键技术后,解决了溢流和漏失同存的难题,提高了钻井速度,保证了钻井安全。In order to solve the problems created by the coexistence of overflow and circulation lost during drilling through fractured carbonate gas reservoirs in the Shunbei Oil and Gas Field and to ensure drilling safety,a technical solution was worked out by means of analyzing the causes of the coexistence of overflow and lost circulation in fractured carbonate gas reservoirs.According to this solution,the first thing to do is to temporarily block fractures that prevent gas invasion into the wellbore,and in the case of gas influx,it is necessary to control the amount of gas influx and the speed of gas channeling to ensure drilling safety.Based on this,tje key technologies for the safe drilling of fractured carbonate gas reservoirs involves integrating temporary blocking technology for fractured reservoirs,using MPD and implementing high temperature gas-block plugging.First,the temporary blocking technology for fractured gas reservoirs should be used to prevent gas from entering the wellbore.In case of gas influx occurs in the bottom hole,MPD should be used to control the influx amount,while high temperature gas-block plugging should be adopted to reduce the speed of gas channeling if the gas is found in the wellbore.After the application of such key technologies in the fractured carbonate gas reservoir in the Shunbei Oil and Gas Field,the coexistence of overflow and circulation lost was solved and drilling speed was increased and the drilling safety ensured.

关 键 词：碳酸盐岩油气藏 裂缝性气藏 溢流 漏失 暂堵 高温气滞塞 控压钻井 顺北油气田 

分 类 号：TE283[石油与天然气工程—油气井工程]