第38参第4期 2016年7月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：1000-7393(2016)04-0415-07
DOI: 10.13639/j.odpt.2016.04.002
基于钻前风险预测的井身结构优化方法
胜亚椭管志川张国辉‘叶浪，刘书杰，冯植稽
1.中国石沟大学（华东)石油工程学院；2.中国石油勘深开发研完院工程所；3.中海油研究总院
Vol. 38 No. 4 July 2016
引用格式：胜亚赖，管志川，张国辉，叶浪，对书杰，马检楷，基于钻前风险预测的并身结构优化方法【J」，石油钻采工艺 2016,38（4):415-421.
摘要：考虑钻并工程风险、基于钻前风险预测的井身结构设计是钻井施工安全顺利进行的保证。钻井工程风险在实钻过程中的主要表现是：并漏、并喷、井辑、卡钻以及井下工具失效等问题。首先基于邻并资料求取了待钻目标井含可信度的地层压力剖面，再利用钻并风险评价方法对待钻日标井并身结构设计方案进行评价，在钻前预测出可能发生的工程风险，并基于预测结果优化井身结构设计方案，规避钻井风险的发生。新方法为合理规避工程风险、调整施工方案、安全快速钻并提供了科学的依据，可以有效降低钻并工程风险发生的概率和频度，缩短建并周期，对于安全、高效钻并具有重要意义。
关键词：并身结构优化；钻井风险；可信度；压力不确定性
中图分类号：TE21
文献标识码：A
Borehole structure optimization based on pre-drill risk assessment SHENG Yanan', GUAN Zhichuan', ZHANG Guohuif, YE Lang , LIU Shujie', FENG Hengzhi 1. College of Perolerm Engineering, China University of Perolerm, Qingdao, Shandong 266580, Chinr 2. Engineering Jastitarte, Research Institufe of Petroleum Exploration and Developmen, Bejing 100083, China;
3. CNOOC Research Irstitufe, Bejing 100010, Chind
Citation: SHENG Yanan, GUAN Zhichuan, ZHANG Guohui, YE Lang, LIU Shujie, FENG Hengzhi. Borehole structure optimiza tion based on pre-drill risk assessment [ J J . Oil Drilling & Production Technology, 2016, 38(4): 415-421.
Abstract: Borehole structure design based on pre-drill risk assessment and considering risks related to drilling operation is the pre-condition for safe and smooth drilling operation. Major risks related to drilling operation include lost circulation, blowout, sidewall col-lapsing, sticking and failure of drilling tools ete. In the study, data from neighboring wells was used to calculate the profile of formation pressure with credibility in the target well, then the borehole structure design for the target well was assessed by using the drilling risk assessment to predict engineering risks before the start of drilling, finally, the prediction results were used to optimize borehole structurc design to prevent such drilling risks. The newly-developed technique provides a scientifie basis for lowering probability and frequency of drlling engineering risks, and shortening time required to drill a well, which is of great significance for safe and high-efficient drilling
Key words: borehole structure optimization; drilling risk; credibility, pressure uncertainty
随着油气勘探向深井复杂地层发展，对于钻井技术的要求越来越高1。深井复杂地层由于油层埋藏深、岩体环境复杂等原因，钻井过程中频繁出现
各种并下复杂与事故，钻并工程风险问题成为了制约深井复杂地层钻井技术实施的瓶颈【2-4]。井身结构设计是钻并工程设计最重要的内容之一，是避免
基金项目：国家科技重大专项深题“西部山前复套地层安全快遗钻并技术"（编号：2011ZX05021-001)；中海石油（中国)有限公司
科研项目“海外BD高温高压高含疏气田水平并钻完并关键技术研究"（端号：YXKY-2015-ZY-12)
第一作者：胜亚格(1989-)，中国石油大学（华东)油气井工程在续博士生，主要从事钻并工程风险评价，并身结构优化设计和油气并井下
信息控制等方面的研究工作。通试地址：(266580)山东省青岛市黄岛区长江西路66号，中国石沟大学（华东）石油工程学院。电话; 18765269210。E-mail; shengyanan_upc@163.com