波动压力是影响井眼稳定的主要因素。
Surge pressure is a major factor which affects borehole stability.
泥页岩井眼稳定是由力学与化学两方面因素共同作用的结果。
Shale stability is influenced by both mechanics and chemistry factors mutually.
用有限元方法进行应力分析及设计保持井眼稳定的泥浆密度。
Porous fluid pressure are also presented by using permeable mechanics method. Finite element model and stress analysis program are developed.
对于极端高压地层，即使不流动，也可能存在井眼稳定性问题。
An extremely high-pressure formation, even if not flowing, may have wellbore stability problems.
现场应用结果表明，该井井眼稳定，井径扩大率很小，有效地解决了井眼失稳问题。
The wellbore is effectively protected from sloughing with small enlargement rate because of applying these techniques.
应用井眼稳定力学理论和H - B非线性准则，建立了井眼围岩力学滑移破坏方程。
The mechanics theory of the borehole stability and H-B's nonlinear criterion are used to establish the equations for slip failure of the rock mechanics around borehole.
而随钻井眼稳定性评价，由于其实时性，能够及时反映井眼情况，从而，得到越来越多的重视。
More and more importance is attracted to the wellbore stability evaluation while drilling, because it can reveal the wellbore status real-time.
并将建立的模型应用于某地区的岩石力学参数及井眼稳定性评价中，现场应用取得了很好的效果。
The model is applied in evaluation of rock mechanics and wellbore stability in some areas, and it wins a good effect.
西江24—3—A14大位移井的摩阻与扭矩、井眼稳定性及井眼清洁是钻井成功与否的关键因素。
Wellbore stability, hole cleaning, toque and drag are key factors in extended reach well drilling of Xijiang 24 - 3 - A14.
进而通过对椭圆形井眼周围岩石应力分布的分析，对不同岩性的地层确定了不同的井眼稳定性条件。
By analyzing the rock stress state around the elliptic borehole, the stability conditions are established for different types of formation.
通过对松南地区储层岩性进行分析，总结了该地区储层损害机理，提出了井眼稳定与减少油气层损害的对策。
Based on analyzing reservoir lithology of Songnan area, the reservoir damage mechanisms are summarized and counter measures are taken to reduce reservoir damages.
岩石力学参数是随钻井眼稳定性评价的基础参数，所以，建立岩石力学参数随钻评价模型，成为此项工作的核心。
And rock mechanical parameters are essential to the wellbore stability evaluation, so developing the model of rock mechanical parameters evaluation while drilling becomes core of the work.
现在井眼已经稳定。
对大部分井眼而言，该曲线的初始稳定部分都是直线，在测量的限度以内。
The initial stable portion of this plot for most wellbores is a straight line, within the limits of the measurements.
由于井眼的不稳定和落入井眼的工具而造成的损失时间，会导致钻井费用更高以及生产的延迟。
Lost time due to wellbore instability and tools lost in a borehole leads to higher drilling expenditures and delayed production.
使该井在施工期间，井壁稳定、起下钻井眼畅通，全井事故、复杂时效均为零。
Thus, stable hole, smooth drilling and tripping operations and zero outage time have been obtained in the construction period.
井眼基本破坏形式是由于不稳定性造成的井眼岩石崩落坍塌和剪切带。
The basic failure mode of borehole is borehole avalanche and shear zone caused by bore instability.
通过优选建立了等效地层电导率变误差迭代搜索方法，提高了井眼环境校正的精度和稳定性。
A technique of variable-error iterative searching solution for equivalent formation conductivity is developed. The accuracy and stability of borehole correction are improved.
文中利用能量法，研究了等曲率井眼中钻柱的稳定性问题。
In this paper, the problem about stability of the drill stem in the borehole with iso-curvature is studied by use of energy method.
由于预期可能遇到井眼不稳定问题，致使作业者计划采用高度依赖随钻测井(LWD)数据的地层评价技术。
The anticipation of possible wellbore instability issues led an operator to employ a formation evaluation program that relied heavily upon logging-while-drilling (LWD) data.
为了保证分支井钻井和完井作业的顺利进行，必须在施工过程中确保井眼的稳定。
For the successful operations of drilling and completion of the branch wells. it is necessary to maintain borehole stability in construction process.
利用能量法推导出斜井眼中具有初弯曲管柱稳定的轴向临界压力计算公式，讨论了初弯曲对轴向临界压力的影响。
By the use of energy method, the formula of axial critical buckling force for a pipe with initial deflection in inclined curved Wells is derived.
本文着重论述了井下闭 环可变径稳定器的结构、工作原理及其控制井眼轨迹的方法。
The structure and principle of operation of the stabilizer, and method for controlling borehole trajectory with the close_loop adjustable stabilizer at downhole are described in detail.
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...
钻成大位移井必须依靠井眼轨迹控制技术，研制的井下闭环可变径稳定器是实现该项技术的关键。
It is necessary to depend on the control technology of borehole trajectory to drill the extended-reach well successfully. A closed-loop adjustable stabilizer at downhole is developed.
钻成大位移井必须依靠井眼轨迹控制技术，研制的井下闭环可变径稳定器是实现该项技术的关键。
It is necessary to depend on the control technology of borehole trajectory to drill the extended-reach well successfully. A closed-loop adjustable stabilizer at downhole is developed.
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