pore pressure

A desirable groundwater table can be obtained via a solenoid valve and a feed-back pore pressure transducer.

Rock drillability of rock samples was studied by means of experiment under zero pore pressure and simulated down hole conditions.

Acceleration, lateral displacement, vertical settlement as well as excess pore pressure were measured during the shaking event.

The pore pressure is one of the basic data during the whole process of oil exploration and production.

However, for strong over consolidated clay, the pore pressure is always negative.

the permeability increased exponentially as the pore pressure increased under different temperatures.

Research shows that the shear strength increases with the dissipation of the pore pressure and increasing of the effective stress.

When the pore pressure is relatively low, the positive-charged polyglycol is mainly used to ensure the muds having good performance.

and a dynamic pore pressure sensor is arranged at the equal height with the rigid ball in the model box.

Reservoir rock is affected simultaneously by external stress (external pressure) and internal stress (internal pressure and pore pressure).

The pressure corresponding to the plateau is taken as an estimate of the pore pressure.

The pore pressure gradually increases as the input motion amplitude becomes larger and the shaking duration becomes longer.

Consequently, pore pressure should be taken into account in the modelling of mechanical behaviour of saturated porous chalk.

Study on whether pore pressure reaches confining pressure under isotropic and anisotropic consolidation.

Formation pore pressure method research is what geologic worker and engineer care about for adjust well water flooded of sandstone oilfield.

The fractures will close with dissipation of the excess pore pressure; however, a residual fracture is developed.

Under the calefactive and isothermal conditions, the seepage flux increased nonlinearly as the pore pressure increased.

Secondly, giving the method for determining the rock mechanical parameters, crustal stress and pore pressure.

The calculated values of pore pressure taking nonlinear seepage behavior into account are closer to the measured ones.

the formula of critical pore pressure of anisotropic consolidated saturated clay under cyclic loading is deduced.

This paper studies the permeability limits and pore pressure conditions of gas reservoirs with slippage effect.

The variation law of pore pressure and strength in the crust layer in the process of liquefaction were studied.

The factor of safety is calculated with the aid of stress fields and the pore pressure field obtained from the finite element analysis.

The effects of interrupting time at different pore pressure developing stages are also evaluated.

Formation drillability is related to formation compact degree and pore fracture degree, so NDR can reflect formation pore pressure state.

pore pressure decreased soon, which reduced settlement after construction caused by secondary consolidation.

Besides, the undrained shear strength was increased slightly due to the negative pore pressure.

The pore pressure estimates must be based on the most suitable methods with respect to the actual well conditions.

Abnormally low pore pressure might occur in areas where fluids have been drained, such as a depleted hydrocarbon reservoir.

In the meantime, the pore pressure also increased with the increase of confining pressure.

Rock pore pressure and fracture pore pressure will fall in oil recovery process. The rock mass shrinks.

Pore pressure buildup was found to affect shear wave velocity in the soil and weaken soil stiffness.

The slow transport of water and water vapor then leads to elevated pore pressure levels.

There are seven variables in the governing equations to comprise the matrix of pore pressure, fluid saturation and displacement.

Based on the rock mechanics experimental data and relevant logging data, the pore pressure profile prediction model was established.

Prediction accuracy of formation pore pressure .

The study results show that the pore pressure and axial strain took on a fluctuant increasing process under cyclic shear loading.

There are two ways for pore pressure dissipation during earth body consolidation in finite elements.

To establish the effect of pore pressure, scientists would need detailed statistics about it from before the earthquake.

When the pore pressure is relatively high, the formate is used as a weighting agent to maintain a low-solid mud system.

In addition to being measured by well tests, pore pressure is measured by formation testers.

The paper presents an effective way to predict formation pore pressure at wellsite-normalized drilling rate.

A new probabilistic model is proposed to evaluate the development of pore pressure in saturated sands under random seismic loading.

A Simple Pore Pressure Estimation Method for A Disequilibrium Compaction Shale Using Sonic Velocity

Experimental study of piezoresistive silicon pore pressure transducers

Model Used for Pre-drilling Prediction of Formation Pore Pressure Based on Seismic Attribute

Techniques for Calculating and Controlling Formation Pore Pressure and Pore Fluid Velocity under Tight Well Pattern Condition

In-situ answering pore pressure under wave and its application to stability analysis of silty seabed

Accurate prediction of formation pore pressure and its application

An In-situ Model Test Study of Excess Pore Pressure due to Pile Driving

Pore Pressure Characteristic Test and Analysis of Soft Clay Foundation During Surcharge Preloading

Numerical Simulation of Hydrofracturing in Anisotropic Pore Pressure Fields

Simplified procedure for evaluation of residual pore pressure response in layered seabed under wave loading

Standard Test Method for Elastic Moduli of Undrained Intact Rock Core Specimens in Triaxial Compression Without Pore Pressure Measurement

Response characteristics of pore pressure in saturated soft clay to the metro vibration loading

Studying on Calculating Method of the Formation Pore Pressure for Carbonate Rock Profile

A pore pressure equation for anisotropic clay and its application

Study Pore Pressure Dissipation and Permeability Coefficient in the Laboratory Test

Application of Spontaneous Potential in Interpretation of Pore Pressure

Post-earthquake ground movements correlated to pore-pressure transients

Method for Improving Precision of Formation Pore Pressure Prediction with Seismic Data

Examination and Adjustment of Formation Pore Pressure through Fluid Logging

Study on squeezing effect against soil and pore pressure by pile pushing in saturated soft clay foundation

Shear Instability of Saturated Soil Considering the Gradients of Strain and Pore Pressure

Logging data are used to interpret the pore pressure of reservoir;

Prediction Technique of Formation Pore Pressure in Drilling and Workover

Logging Interpretation of Reservoir Pore Pressure

Discussions on the traditional pore pressure evaluation methods by using well logging

Stable Condition of Sidewall Considering Damage and Pore Pressure

On Relation Between Rock Drillability and Formation Pore Pressure from Log Data

The Pore Pressure's Numerical Analysis for Saturated Soft Clay Under Cyclic Loading

Wave-induced Pore Pressure in Sandy Seabed near Vertical Breakwater of Rubble Mound

A summary of research on residual strain and pore pressure of soils under earthquake loads

Pore-pressure theory and experimental research for non-saturated clay

The Mechanism of Seabed Instability Induced by Wave and the Discussion about Pore Pressure

Excess pore pressure induced in piling in saturated structural soft soils

In-situ monitoring and assessment techniques for pore pressure of seabed soil

Some Problems on the Deformation and Pore Pressure of Soft Clay under Impact Loading

A new integrated pore pressure evaluation method for shale-sand formations

Dividing Horizons of Soil and Types of Soil by Pore-Pressure Static Sounding

Estimation of pore pressure of saturated compact sand soil in non - linear state

Mechanical behavior of sands subjected to cyclic pore pressure

Study on Pore Pressure and Liquefaction Behavior of Saturated Silt

New method for predicating pore pressure in development wells

Analysis of field test data on pore pressure in vacuum drainage preloading

Pore Pressure Model of Saturated Soft Clay under Circulating Load

Study on predicting method of formation pore pressure for carbonate rock

Pore pressure characteristic analysis of soft clay during unloading based on lab data and numerical calculation

Undercompaction Causes for Using Seismic Data to Predict Formation Pore Pressure

Technologies for prediction of pore pressure

Technologies for prediction of pore pressure

Study on high pore pressure in clay core wall of earth dam in Xiaolangdi Project

Excess pore pressure around deep mixing column in soft Ariake clay

Effect of Pore Pressure on Entire Deformational Characteristics of Rock Specimen

Seismic Pore-pressure Prediction Using Reflection Tomography and 4-C Seismic Data

Study on Coefficient of Pore Pressure of Saturation Soil

Numerical analysis on pore pressure of clay under shock load

Variation of pore pressure and liquefaction of soil in metro

Prediction of Formation Pore Pressure in Wild Cat Wells

Pore pressure evaluation method based on regression support vector machines

A review of pore-pressure prediction by seismic techniques

The Effects of Pore Pressure Alterations on the In-situ Stress

A discussion about the methods for predicting pore pressure

New Data Processing Methods to Reduce Errors of Pore-Pressure Prediction Based on Well Logging Data

Soil lines of equal pore pressure

The Primary Analysis of Formation Pore Pressure in No. 1 Block of Middle Zhunger Basin