This paper researched the hydrodynamic pressure and its change characteristics in the space by means of the ion concentration of formation water, reduced pressure and its change characteristics in the plane,The result indicates that from north-east to south-west,the hydrodynamic conditions are better and better in Binbei region, the areas near the Binbei railroad are the favorable area for oil and gas to accumulate.

For CVFE grid,reduced pressure gradient is approximated using finite difference and finite element methods simultaneously,and a new upstream weighting approach is proposed based on the signal of flow term,which is more reasonable. The final discrete form of CVFE grid is different from that of PEBI grid and finite difference method.

This paper,aiming at limitation of conventional method of measuring the bottom pressure of oil wells and on the basis of converting pressure through testing liquid level by echo sounder ,considered the dissolubility of gas and compressibility of oil and gas and water,adopted n section pattern and Gilbert and Podio correlation models of matching liquid distrbuting phase in pipe lines,and calculated the bottom pressure of oil wells applying the calculus.

5.Research on gas-water contact. By integrative use of static and dynamic data of gas reservoir, the three methods such as well logging, core and conversion pressure coefficient are used to gas-water contact of the gas reservoir.

By introducing reduced reservoir pressure, the preliminary working system of the oil well can be determined based on the close relationship between the restoring speed of the static liquid surface of the well and its productivity.

The dependences of the capillary pressure on the thickness upon the creation of reduced pressure in a film (capillary pressure isotherms) are also given.

The method consists of integration of the Reynolds equation over the region occupied by the film, using the boundary differential equation for the integral of the reduced pressure.

To determine the thickness of the film it is sufficient to know only the integral of the reduced pressure along the line of a constant gap.

The results are presented of the numerical investigation of the interaction of a supersonic axisymmetrical jet of a nonviscous and nonthermally conductive gas, flowing from a conical nozzle into a space with reduced pressure, with a plane obstacle.

Asymptotic solutions are found to problems of the dynamics of films in communication with a region of reduced pressure.

This paper discusses the calculating method of flowing pressure and average reservoir pressure of gas well. Wellhead pressure is measured by means of changing the production rate of gas well (or changing production system of gas well). Cullender and Smith models are selected to calculate the Bottomhole pressure and Ressell two-rate testing well analyzing method is selected to calculate the average reservoir pressure of gas well. Using this method,the caculation result is more accurate. The relative error of...

This paper discusses the calculating method of flowing pressure and average reservoir pressure of gas well. Wellhead pressure is measured by means of changing the production rate of gas well (or changing production system of gas well). Cullender and Smith models are selected to calculate the Bottomhole pressure and Ressell two-rate testing well analyzing method is selected to calculate the average reservoir pressure of gas well. Using this method,the caculation result is more accurate. The relative error of reduced pressure is less than 2% in the application of the method to gas field.

According to the discrete material balance equation of control volume,a new numerical scheme based on PEBI grid and CVFE grid is provided,where absolute permeability is in tensor form. Because of PEBI grid's orthogonalization,its discrete equation is similar with that of finite difference method. The mobility coefficient and interface permeability can be calculated as same as finite difference method. For CVFE grid,reduced pressure gradient is approximated using finite difference and finite element methods...

According to the discrete material balance equation of control volume,a new numerical scheme based on PEBI grid and CVFE grid is provided,where absolute permeability is in tensor form. Because of PEBI grid's orthogonalization,its discrete equation is similar with that of finite difference method. The mobility coefficient and interface permeability can be calculated as same as finite difference method. For CVFE grid,reduced pressure gradient is approximated using finite difference and finite element methods simultaneously,and a new upstream weighting approach is proposed based on the signal of flow term,which is more reasonable. The final discrete form of CVFE grid is different from that of PEBI grid and finite difference method. Numerical model tests show that the method proposed by this paper is as accurate as nine point finite difference when permeability tensor is in diagonal form, and it can simulate more complicated cases when permeability is in full tensor form. Its application prospect is more extensive in fine detailed reservoir simulation.

In well completing test for gas wells of Feixianguan Group with high sulphur content,the well test interpretation can't be conducted until the pressure data are calculated with gas column calculating formula because the distance between the pressure testing point and the central part of the formation is too big.Based on the quality,momentum,and energy conservation laws and the state equation,considering the momentum loss of gas column flowing and the complicated thermal conduction mechanism in the bore hole...

In well completing test for gas wells of Feixianguan Group with high sulphur content,the well test interpretation can't be conducted until the pressure data are calculated with gas column calculating formula because the distance between the pressure testing point and the central part of the formation is too big.Based on the quality,momentum,and energy conservation laws and the state equation,considering the momentum loss of gas column flowing and the complicated thermal conduction mechanism in the bore hole and formation,the pressure and temperature calculating method is derived for single phase gas flow in different positions of the bore hole.Taking Well Po 2 as an example,with MDT technology,the calculated pressures are verified and analyzed.The results indicate that applying the pressure calculating method provided by the paper,the accuracy of the pressure data can be reached completely.With MDT pressure data,the reservoir parameters,such as formation pressure,etc.,can be determined directly and reliable before well completing test.The method can be alao used for production performance monitoring of Feixianguan soar gas reservoir to control elemental sulphur depositing in bottom hole and bore hole.So,the method is very useful.