在石油钻井工程中，影响井壁稳定性的因素较多。
Many factors can influence stability of well wall in the area of petroleum drilling engineering.
提高取心率与保持井壁稳定性是对油页岩充分评价的关键性技术。
Increased core rate and to maintain borehole stability obtained is crucial to fully evaluate the oil shale.
最后选择适当的强度准则，形成气体钻井井壁稳定性分析模型系统。
Then by selecting appropriate strength criteria, the borehole stability analysis model for gas drilling can be set up.
泥页岩井壁失稳的化学与力学耦合作用是井壁稳定性研究中较为关注的问题。
Shale stability coupling with mechanics and chemistry is a focus of attention in the field of borehole wall stability study.
生产过程中的井壁稳定性和地层出砂问题是剩余油开采过程中的主要难题之一。
Wellface stability and formation sand production in the process of production is one of tough problems in remaining oil production.
结果表明：苏里格气田上古地层气井井壁稳定性较好，可进行储层段的裸眼完井。
The results show that gas well sidewall stability of ancient strata in Sulige gas Field is good and open hole completion is feasible in gas reservoir section.
此外，野猫井的井壁稳定性一般凭经验判断，所以复杂地层的井壁失稳事故在所难免。
In addition, the stability of wildcat well is generally determined by experience, so the disaster at complex formations is unable to avoid.
钻遇地层复杂，井壁稳定性差，井漏、井涌、井塌、缩径、卡钻等井下复杂情况频发；
Drilled formations are complex with unstable wall. Lost circulation, well kick, borehole collapse, diameter shrinkage, sticking and other complex situations often occur.
同时给出了利用地震层速度预测地应力的BP神经网络模型，以在钻前预测井壁稳定性。
Meanwhile, the predicting method of stress is proposed based on BP's neural network by using the seismic interval velocity, in order to predict borehole wall stability.
在影响水平井完井方式选择的因素当中，水平井的井壁稳定性是其中最重要的因素之一。
The stability of horizontal well is one of most important factors which affect the choice of completion.
井壁热应力对于井壁稳定性、水力压裂、水泥环胶结强度、热采套管的损害等都有影响。
The wellbore stability, fracturing, cementing strength, and casing failure during thermal recovery are affected by thermal stress.
利用该关系式建立了出砂判别模式和井壁稳定性分析模式，在实践中取得了较高的符合率。
The relation formula is used to develop the sand production test model and wall stability analytical model.
所得结果不仅可用于煤矿立井井壁稳定性分析，对深立井井壁结构的优化设计同时具有重要的参考价值。
The research result is not only used to the stability analyzes of shaft in mine, but also used as the reference of the optimization design of shaft construction in rock part of deep shaft.
泥页岩比表面积与泥页岩水化特性、力学性质以及渗水性密切相关，是评价泥页岩井壁稳定性的关键参数。
The specific surface area is closely related to shale waterize property, property of mechanics and weeping property. It is a key factor for evaluating borehole stability of mud shale.
给出了考虑水化作用和滤饼质量后预测井壁稳定性的方法，同时将该方法应用于现场，取得了较好的预测效果。
The method to predict wellbore stability is provided considering hydration and filtrate cake quality. In addition, this method was applied in field with better prediction results.
井壁失稳一直是困扰油气井工程的难题，泥页岩渗透特性的定量测定是评价泥页岩井壁稳定性的重要指标之一。
The problem of wellbore instability has been puzzling drilling operations all the time, and to quantify the permeability of shales is an important index to estimate shale-borehole's instability.
依据井壁围岩是否达到临界塑性状态而不是弹性极限状态来判断井壁稳定性是气体钻井井壁稳定分析模型的特殊之处。
The peculiarity of this wellbore stability model is to determine whether the wellbore rock is in the critical plastic state rather than elastic limit state.
用逐步回归法对影响井壁稳定性的因素进行了分析，通过逐步筛选因子从诸多因素中找出了对井壁坍塌有重要影响的因素。
Influence factors of hole stability are analysed by means of step regression analysis method, and they can be sorted by step sizing factor.
计算结果同时证明，如果在川西深层采用定向井钻井，其井壁稳定性将不会因为井斜角、相对方位角的变化而变差，且地层破裂压力会随井斜角和相对方位角的增加而大幅提高。
It also figures out that the wellbore stability of directional well in the West of Sichuan Basin will be much better than the straight hole with the increasing of the deviation and relative azimuth.
通过理论分析的方法，深入研究了漂浮下沉阶段钻井井壁的竖向稳定性问题，证明了漂浮下沉阶段井壁的稳定平衡性。
Theoretical analysis is used to analyze shaft drilling lining's vertical stability problem in floating and dropping phases, its stable equilibrium is proved.
该参数计算的准确与否直接影响到井壁力学稳定性评价的准确性。
Whether the parameter is accurately calculated or not directly affects the evaluation precision of borehole mechanics stability.
本文以弹性理论与岩石力学为基础，对分支井的连接井段井壁力学稳定性进行分析和研究。
Based on elastic theory and rock mechanics, the mechanical stability of wellbore of multilateral junctions is analyzed and researched.
实验表明，硫化氢与处理剂反应产物确实起到了“胶结物”的作用，可以明显强化井壁岩体稳定性。
Results show that, the reaction products of hydrogen sulfide and agent actually plays a role of cementing, which can significantly enhance wellbore stability.
同时研究了不同参数对裂缝扩张和井壁稳定的影响，为正确认识裂缝井眼的稳定性提供了科学依据。
At the same time, we studied that the different parameters how to affect the crack extending and wellbore stability. Thus this paper offered the scientific foundation for correct under...
同时研究了不同参数对裂缝扩张和井壁稳定的影响，为正确认识裂缝井眼的稳定性提供了科学依据。
At the same time, we studied that the different parameters how to affect the crack extending and wellbore stability. Thus this paper offered the scientific foundation for correct under...
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