钻井液组分对泥饼抗剪强度的影响

王剑波; 莫军; 熊跃; 马超; 王中武; 顾军

doi:10.3969/j.issn.1001-5620.2015.03.018

钻井液组分对泥饼抗剪强度的影响

doi: 10.3969/j.issn.1001-5620.2015.03.018

1.
中国石化西南油气分公司, 成都
2. 中国石化西南石油工程有限公司固井分公司, 四川德阳
3. 中国地质大学资源学院, 武汉

基金项目: 国家自然科学基金项目"钻井液/水泥浆不变条件下固井二界面泥饼固化机理与界面交联机制"(51174180)

详细信息

作者简介:
王剑波,高级工程师,1983年毕业于西南石油学院钻井工程专业,主要从事油气田钻完井技术研究。地址:四川省阆中市较场路12号元坝气田开发建设项目部1210号;邮政编码637400;电话18583379766;E-mail:1752781202@qq.com。

中图分类号: TE256.3
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出版历程
- 收稿日期: 2015-01-14
- 刊出日期: 2015-05-31

Effect of Composition of Drilling Fluid on Filter Cake Shear Strength

PetroChina Southwest Oil & Gas field Company, Langzhong, Sichuan 637400, China

摘要

摘要: 钻井液组分直接影响井内泥饼的成分和性质,并最终影响隔层界面处泥饼的力学性能。为研究钻井液不同组分对泥饼抗剪强度的影响机理,综合运用土的重塑和直剪实验,分别测量膨润土重塑土、膨润土-铁矿粉重塑土、膨润土-石英砂粉重塑土的抗剪强度指标,研究钻井液泥饼中的黏土矿物、加重材料和钻屑3 类固相物质对界面泥饼的抗剪强度影响。结果表明,在一定含水率和压实程度下,随着泥饼中铁矿粉含量的增大,泥饼的内摩擦角和黏聚力均线性减小;当泥饼中石英砂粉质量分数低于10% 时,泥饼的内摩擦角和黏聚力均线性减小;而当泥饼中石英砂粉质量分数高于10% 时, 泥饼的内摩擦角、黏聚力变化不大;一定范围内, 泥饼中膨润土含量增加有利于提高泥饼黏聚力。
- 隔层界面 /
- 抗剪强度 /
- 泥饼 /
- 直剪实验
Abstract: Drilling fluid composition directly affects the composition and property of filter cakes, which in turn affect the mechanical performance of the filter cakes at interlayer interface. Shear strengths of several clay samples, such as pure bentonite, bentonitehematite manipulated clay, and bentonite-quartz powder manipulated clay were measured to study the effect of three solids (clay, weighting agent and drill cutting) on the shear strength of filter cakes at the interlayer interface. The study showed that, at certain water content and compaction condition, the angle of internal friction and cohesive strength of filter cake linearly decreased with an increase of hematite content in filter cake. When mass ratio of quartz powder in filter cake was less than 10%, same result as hematite was obtained. When mass ratio of quartz powder in filter cake exceeded 10%, the angle of internal friction and cohesive strength of filter cake remained almost constant. Cohesive strength of filter cake increased with an increase of bentonite content in filter cake at a certain range.
- Interlayer interface /
- Shear strength /
- Filter cake /
- Direct shearing test

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