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气体钻井遇地层出水时的充气钻井技术

来源:天然气工业 日期:2011-11-01 浏览量:
【英文篇名】 Aerated drilling used during gas drilling when encountering the formation water invasion
 
【作者】 卓云; 胡显智; 郑霞; 周永建; 孟米; 徐鸣祥;
【英文作者】 Zhuo Yun1; Hu Xianzhi1; Zheng Xia1; Zhou Yongjian1; Meng Mi2; Xu Mingxiang3(1. Chuandong Drilling Company; Chuanqing Drilling Engineering Co.; Ltd.; CNPC; Chongqing 400021; China; 2. Chuangqing Drilling Engineering Co.; Chengdu; Sichuan 610500; 3. ChinaUniversity of Petroleum-Beijing; Beijing 100083; China);
【作者单位】 川庆钻探工程有限公司川东钻探公司; 川庆钻探工程有限公司; 中国石油大学;
【中文关键词】 四川盆地东部; 气体钻井; 地层出水; 充气钻井; 井壁稳定; 气液比; 钻速; 井漏;
【英文关键词】 east; Sichuan Basin; gas drilling; formation water production; aerated drilling; wellbore stability; gas-liquid ratio; ROP; lost circulation;
【摘要】 气体钻井在我国油气田勘探开发中具有广阔的应用前景,但是川东地区多个构造实施气体钻井过程中,存在地层出水现象,严重影响了气体钻井的顺利进行,不得不改用充气钻井。充气钻井技术难点主要表现在:①井壁稳定性差,易引起垮塌卡钻;②地层出水可能与井漏同存,气液比值难以确定;③环空液柱压力降低,带砂效果差,易导致沉砂卡钻;④浅层天然气易引起井下燃爆。通过分析上述难点,结合充气钻井现场实践经验,有针对性地提出了充气钻井过程的主要技术措施:①钻井液维护处理技术;②井漏处理技术;③参数设计技术等。在川东地区3口井的现场应用效果表明:推行所提出的充气钻井技术措施,能有效避免井漏、提高机械钻速、缩短钻井周期,为川东地区遇地层出水情况下的气体钻井积累了经验。
【英文摘要】 Gas drilling has a promising prospect in hydrocarbon exploration and development in China. However, during its application in many eastern Sichuan structures, the water production out of the formations has badly affected the smooth operation of gas drilling, and in such a case, aerated drilling has to be used. This paper first presents many difficulties in aerated drilling: (1) poor wellbore stability often leads to sloughing or sticking, (2) the possible co-existence of lost circulation and water invasion ...
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