第39参第3期 2017年5月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：10007393(2017)03028206
DOI:10.13639/j.odpt.2017.03.005
Vol. 39 No. 3 May 2017
考虑延伸极限的大位移水平并最优钻并液排量设计
李鑫高德利
中国石油大学石油工程教育部重点实验宝
引用格式：李鑫，高德利.考虑延伸极限的大位移水平并最优钻井液排量设计[J】.石油钻采工艺，2017,39(3)：282-287 摘要：钻并液排量的大小直接关系到大位移水平并延伸能力的高低，为获得最大的大位移水平并延伸极限，笔者从钻并液
排量的角度出发，提出了排量的优化设计原则，并给出了最优钻并液排量的设计方法。综合利用大位移井的操眼延伸极限原理和水力延伸极限原理，并考虑井眼清洁的需要从而确定钻并液的排量范图，最终以获得最大的水平段延伸极限为目标，确定最优钻并液排量值。应用该方法对1口大位移水平井进行分析可知，其排量允许范围为26.2~42.9L/s，最优排量值为31.8L/s，其对应的最大水平段延伸极限为6251m。进一步研究表明：首先，在任意排量下，基于上述两原理获得的两水平段延伸极限值的最小值可以作为大位移水平井的水平段延伸极限；其次，两水平段延伸极限相等时的值即为最大水平段延伸极限，其所对应的排量值即为最优钻并液排量值；最后，该最优排量值既可以保证大佳移水平并获得最大的并眼延伸极限，文可以满足并眼清洁的需要，并内压力不会超过井壁稳定和钻并泵的最大承载能力。
关键词：大位移水平并；钻并液排量；最优排量；并眼清洁；延伸极限
中图分类号：TE243
文献标识码：A
Optimum drilling fluid displacement designof largedisplacementhorizontal
well considering extension limit
LI Xin, GAO Deli
Key Labonafory of Pefroleum Engineering Edrcation Ministry, China Uriversity of Petroleam (Bejing), Bejing 102249, Chind
Citation: LI Xin, GAO Deli. Optimum drilling fluid displacement design of large displacement horizontal well considering exten-sion limit [ J] . Oil Drlling & Production Technology, 2017, 39(3): 282-287.
Abstract: Drilling fluid displacement has the direct effect on the extension capacity of extended-reach horizontal wells. To maxi-mize the extension limit of extended-reach horizontal wells, the displacement optimization design principle was put forward from the aspect of drilling fluid displacement, and the design method of optimal drilling fluid displacement was proposed. The displacement range of drilling fluid was determined by taking into consideration the demand of hole cleaning. According to open-hole extension limit principle and hydraulic extension limit principle of extended reach well comprehensively, the optimal displacement of drilling fluid was determined with the maximization of horizontal section extension limit as the ultimate target. This method was used to analyze one extended-reach horizontal well. It is shown that the allowed displacement is in the range of 26.2-42.9 L/s, and optimal displacement is 31.8 L/s, corresponding to the maximum horizontal section extension limit of 6 251 m. Based on further studies, several understandings were obtained. First, for any displacement, the minimum extension limit of two horizontal sections which are obtained based on the above mentioned two principles can be taken as the horizontal section extension limit of extended-reach horizontal well. Second, the value in the occasion the extension limit of both horizontal sections is equal is the maximum extension limit of horizontal sections, and its corresponding displacement is the optimal displacement of drilling fluid. And third, at the optimal displacement, the extension limit
第一作者：李鑫（1990-),2014年毕业于中国石沟大学（北京）油气井工程专业，主要从事沟气并力学与控制工程方面的研究工作。通试
地址：(102249)北京市高平区府学路18号。电话：010-89733702。E-mail；lixin0102@126.com
通讯作者：高德利（1958-),1990年毕业于中国石沟大学（北京)，主要从事油气并力学与控制工程方面的研究工作。通讯地址：(102249）
北京市高平区府学路18号。E-mail：gaodeli@cast.org-cn
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