The dry coefficient and the gas/oil ratios decrease from east to west,suggesting a westward gas invasion from the east slope.

\ The sensitivity coefficients to the porosity are derived from the initial boundary value problems for the fluid equations in porous media by the Green's Reciprocity Principle.

The investigation includes such procedures as formulating a prior reservoir model, deriving sensitivity coefficients, sampling a posteriori probability density function, and predicting uncertainty of reservoir performance.

Theoretical equations for computing sensitivity coefficients of wellbore pressures to estimate the reservoir parameters in low_permeability reservoirs conditioning to non_Darcy flow data at low velocity were obtained.

The courses were arc measurement been instead of elliptic arc measurement,part\'s manufacturing errors,the non-corrected gauge probe radius and the sensitivity coefficient of the arc of small central angle.

By means of establishing mathematic model for the influence of synthetic accuracy of track of planar four-bar linkage affected by manufacturing error of bar length, the sensitive coefficient of manufacturing error of bar-length was determined and the law of influence on synthetic accuracy of track affected by manufacturing error of bar length was analyzed.