论文详情

南海流花超大位移井井壁稳定性分析

石油钻采工艺

2006年 28卷第1期

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Title

BOREHOLE STABILITY ANALYSIS FOR MEGA-EXTENDED-REACH WELLS AT LIUHUA OIL FIELD IN SOUTH CHINA SEA

作者

蔚宝华邓金根高德利

Authors

Yu Baohua Deng Jin’gen Gao Deli

单位

中国石油大学, 北京 102249

Organization

China University of Petroleum, Beijing 102249

摘要

大位移井钻井的主要技术难点之一是如何保持井壁稳定,井壁稳定与否是关系到一口井成败的关键。利用流花油田已钻井的测井数据,采用EATON法分析了流花油田孔隙压力,得出该油田的孔隙压力为1.02~1.04g/cm3;利用声发射凯塞尔效应法对取自流花11-1油田的岩心进行了地应力测定;应用已钻井测井资料并结合录井岩性剖面对流花11-1油田地层强度进行了计算分析。在此基础上定量分析了该油田在超大位移井钻井过程中泥页岩地层和灰岩储层的井壁稳定性,并得出了地层破裂压力、坍塌压力随井斜角和方位角的风险分布规律以及安全钻井液密度窗口。现场应用取得了较好的效果,为超大位移井的井壁稳定性控制提供了科学依据。

Abstract

Borehole stability is one of the most important factors for successful drilling of extend-reach well.Based on the comprehensive analysis of logging data,geological information and laboratory tests results,this paper studied the pore pressure,in-situ stresses and rock strength of Liuhua 11-1 oil field,analyzed the borehole stability during the drilling of shale and limestone payzones for extended-reach wells,and calculated the safe mud density window for the extended-reach wells.Field application showed excellent results,which provide a quantitative base for the drilling design of extended-reach wells in the field.

关键词：

大位移井; 泥岩; 灰岩; 井壁稳定性; 安全钻井液密度;

Keywords:

extended-reach well; claystone; limestone; wellbore stability; safe mud density window;

基金项目

DOI

10.3969/j.issn.1000-7393.2006.01.001