第39参第6期 2017年11月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：1000-7393(2017)06068804
DOI:10.13639/j-odpt.2017.06.005
溢流环空压力峰值确定套管下深方法
霍宏博1.2许杰1-2谢涛1.2李金蔓1幸雪松1.2林海1.2 1.中海石沟（中国)有限公司天津分公司；2.海洋石油高效开发国家重点实验室
Vol. 39 No. 6 Nov.2017
引用格式：霍宏博，许杰，谢涛，李金蔓，幸雪松，林海.溢流环空压力峰值确定套管下深方法[J］.石油钻采工艺，2017，39(6): 688-691
摘要：目前套管下深设计主要考虑关并压力，但实际压井过程中，循环排气时的环空压力峰值高于关井时的环空压力。为保证溢流井控全过程不压漏地层以及减少地层压力不确定性对并控风险的影响，通过计算循环压井将溢流物循环排出并筒过程中环空压力变化，计算出环空压力峰值，建立其随溢流强度变化的图版，并提出根据溢流环空压力峰值对比地层破裂压力确定套管下入深度的方法。结合油图实例计算证明：该方法能够明确套管下深可应对的井涌强度，使地层压力不确定性可控，实现了套管下深精细设计。
关键词：套管下深设计；并控安全；循环排气；井涌强度；环空压力；溢流
中图分类号：TE21
文献标识码：A
Determination of casing setting depth based on peak overflow annulus pressure
HUO Hongbo", XU Jie", XIE Tao"2,LI Jinman,XING Xuesong", LIN Hai'2
1. CNOOC Tianjin Branch Company, Tianjin 300452, Chinar; 2. Srate Key Labonafory of Ofshore Oil Exploitation, Tianjin 300459, Ching
Citation: HUO Hongbo, XU Jie, XIE Tao, LI Jinman, XING Xuesong, LIN Hai. Determination of casing setting depth based on peak overflow annulus pressure [ J] , Oil Drlling & Production Technology, 2017, 39(6): 688-691.
Abstract: At present, shut-in pressure is the main factor that is taken into consideration when the casing setting depth is designed. In the actual process of well killing, however, the peak annulus pressure during the circulating out of the gas is higher than the annulus pressure during well shut-in, To prevent cireculation loss in the whole process of overflow well control and reduce the effect of formation pressure uncertainty on well control risk, the peak annulus pressure was calculated by calculating the change of annulus pressure during the circulating of the overflow materials out of the borehole by means of circulative well killing, and the chart for the variation of peak easeaases e aasss the peak overflow annulus pressure, combined with the formation fracture pressure. It is proved from the case calculation of an oilfield that this method can define the kick strength corresponding to the casing setting depth, and thus the uncertainty of formation pressure is the controllable and the casing setting depth is designed precisely
Key words: design of casing setting depth; well control safety,; circulating out of gas; kick strength, annulus pressure; well shut-in
孙振纯！曾指出中国钻井井控技术是在付出惨重代价并经过长期艰苦探索和不解努力后形成的。预防和控制并喷是一个世界性的难题，各种并喷事故时有发生【2,2010年美国墨西哥湾井喷再次为世
人敲响警钟【3。在国内，楚29井【4]、毛坝1井【5] 胜利油田老区16]等钻井过程中发生溢流压井时都曾有过压漏地层的情况。套管下入深度是钻井设计阶段考虑控制地层漏失的重要因素，已有学者对井身
第一作者：霍宏博（1985-),2013年毕业于西南石油大学海洋沟气工程专业，项士研究生，现主要从事绸油热采、钻井并控等方面的研究
工作，中版工程师。通讯地址：(300459）天津市滨海新区海川路2121号激海石油管理局B座1503。电话；022-66501117。 E-mail; huobb@cnooc.com.cn
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