地层不稳定，井壁垮塌严重。
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.
主要研究分析了元素硫在地层中沉积的预测模型的建立以及含硫气井的不稳定试井解释方法。
Mainly studied the prediction model of sulfur deposition in the stratum and transient well test of sour gas well.
卵砾石地层是钻探工程中常见的一种典型的不稳定地层。
Gravel strata is a kind of typical instable layer in drilling engineering.
压裂充填工艺是中高渗透油气层和不稳定松软地层的有效增产、防砂措施，又是一种新的完井方法。
Frac and pack technology is both a effective stimulation and sand control treatment, and a new completion method in unstable crumbly formation and high permeability reservoir.
基于可压缩流体不稳定流动理论及地层流体渗流理论，建立了气体钻井过程中井筒瞬态流动的数学模型。
Based on the theory of unsteady flow of compressible fluid and the seepage theory of formation fluid, the mathematical model of the gas transient flow in the wellbore has been established.
细粒运移可由非胶结的或固有不稳定的地层所引起，或者由使用可释放细小颗粒的不配伍处理液所造成。
Fines migration may result from an unconsolidated or inherently unstable formation, or from use of an incompatible treatment fluid that liberates fine particles.
通过分形油藏压力不稳定试井理论的研究，提出了一种使用短期关井压力数据确定地层压力的新方法。
In this paper, a new method is presented to define formation pressure in short-term closed-in pressure, which based on the research about theory of unstable well testing of fractal reservoirs.
本文在无限大均质地层弹性不稳定渗流模型解析解的基础上，建立了与地层耦合的水平井筒压降模型。
A pressure drop model in horizontal well was established on the basis of the analytical solution of an elastic and unsteady seepage flow model in infinite reservoir.
周期性脉冲式注水可以在地层中造成不稳定压力状态，在薄含水层中造成剩余压力。
Cyclic pulse injection may cause the transient pressure regime in the reservoir and remaining pressure in a thin aquifer.
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.
利用不稳定试井原理，结合地层测试已取得的地层参数进行分析，得出预测产能的公式。
Based on the theory of transient well test, combining formation parameters analysis obtained from formation test, the formula of predicting productivity has been found.
工程施工钻孔中，经常遇到不稳定地层。
无水砂卵石是一种典型的力学不稳定地层，对盾构存在较大的不良影响。
Waterless sandy cobble is a typical unstable stratum which is unfavorable to shield construction.
非牛顿流体在地层中的粘度是一个随剪切速率变化而改变的非常数，反映在不稳定压力响应特性上表现出与牛顿流大不相同的特征。
Non-Newtonian fluid viscosity in the formation of a shear rate of change with variable, stress response reflected in the instability shown by different characteristics of Newtonian flow.
天气尺度动力条件和局地层结不稳定结构都表明，此次局地强天气的发生有良好的环境条件。
The dynamic conditions of synoptic scale and local unstable stratification structure show that there are suitable conditions for the occurrence of locally developing convective systems.
实际的地层孔隙压力随时间与距离变化的规律可以使用一维不稳定渗流模型来描述和计算。
This paper uses one dimension unstable seep model to describe and calculate the law of actual pore pressure under various times and locations.
砂卵石是一种典型的力学不稳定地层，盾构在此不利条件下安全穿越铁路困难较大。
Gravel is a typically unstable stratum and its mechanical properties is unfavorable to tunnel face stability.
利用不稳定试井资料不但可求取地层压力等油藏参数，还可应用于探测断层距离或岩性尖灭等。
Pressure transient analysis results may not only be used for the obtaining of reservoir parameters such as formation pressure, but also for the detecting of faults distance or lithological pinch-out.
利用不稳定试井资料不但可求取地层压力等油藏参数，还可应用于探测断层距离或岩性尖灭等。
Pressure transient analysis results may not only be used for the obtaining of reservoir parameters such as formation pressure, but also for the detecting of faults distance or lithological pinch-out.
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