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.
如何控制陆相地层横向不稳定性，是盆地分析的难点。
The difficulty for analysing basin sedimentation is how to control the horizontal variation of continental strata.
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.
驱油试验时，对其发泡能力、稳定性与地层水的配伍性及耐油性进行了评价。
Its foaming capacity, stability, compatibility with formation water and oil resistance are evaluated in oil displacement test.
再加上地下采矿所在的地层存在着原始的地应力，对采矿过程系统的稳定性有着直接的和巨大的影响。
In addition, the stratum where underground mining exits virgin stress, which affects the stability of mining system directly and greatly during mining.
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.
同时，根据该区的地质构造、地层结构、地面建筑等有关参数资料，分析和计算了斜风井巷道的稳定性和安全性。
Moreover the stability and safety of the inclined shaft tunnels are analyzed and calculated based on the parameters of geological structures, stratigraphic configuration and ground buildings.
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.
有必要通过现场取样获得浅部地层的地质资料，对深水钻井井口力学稳定性进行分析。
It is necessary for deepwater drilling to analyse the geological data in shallow formation and mechanical stability of wellhead.
采煤塌陷区隧洞围岩稳定性，既受隧洞自身开挖的影响，又受洞下采煤引起地层移动的影响，是一个极其复杂的问题。
The stability of tunnel in mining-coal induced subsidence area is a complicated problem because of the influence of tunnel excavation and strata displacement induced by mining.
露天采矿工程中的高边坡稳定性受到很多因素的干扰与控制，其中包括地形条件，气象、水文条件，地层岩性条件，地质构造条件等。
In open pit mining project the stability of high slope is affected and controlled by many factors, such as topography, meteorology, hydrology, stratum lithology and geological structure conditions.
本文重点对极软岩中的典型代表昔格达地层路堑边坡稳定性进行研究。
This paper is focused on the studying of excavation slope stability of Xigeda strata, a typical model of dead soft rock.
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.
压力计记录装置的精度及稳定性直接关系到地层测试的成功与否。
Precision and stability of gauge recording apparatus has relation with being successful or not of the well testing.
最后，探讨了盾构隧道结构和周边地层的加固方案，以保证结构稳定性。
Finally, the reinforcing method of the shield tunnel structure and the surrounding stratum is given to guarantee the structure stability.
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.
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.
米兰柯维奇旋回在地质历史时期具有相对的稳定性，其在地层中的记录可以作为一座精确的“沉积物钟”和辅助的测龄工具。
The Milankovitch cycle, whose records in strata can be considered both as an accurate "sediment clock" and as an auxiliary dating tool, is relatively stable in the geologic history.
通过该方案在实测中的验证表明，该方案具有较强的适应性和稳定性，解决了传统算法中同一地层下综合移动角差别较大的问题。
The practical measures show that this scheme has stronger adaptability and stability and this algorithm can solve the problem of larger deviation of synthetic angle of draw calculated by t…
当坡高、坡型、地层条件相同时，路堑边坡的稳定性较削坡的稳定性差。
With same stratum, slope height, slope type, the cutting slope is inferior to the sharpen slope in stability.
根据滑坡发生的频率周期．依据高程及地层岩性对该地区斜坡稳定性进行了分区。
According to the frequency of landslide, its altitude ab0ve seaulevel and the naturepropety of rock stratum, the stabilities of slope areas are classified.
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.
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.
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