Application study indicates that delicacy reservoir description can point out where the remaining oil distribute. Well-logging is important method in fixed amount evaluating remaining oil. By synthesizing measures, tapping the latent power is efficient approach in raising production of oilfield.

As to production and injection well in different condition,a new method was built for flow connection and production matching , determination of threshold value of permeability dispersion,calculating of starting pressure,handle of untabulated layer and boundary,determination of relative permeability type and dynamic model parameters adjustment. It can be used to evaluate remaining oil saturation and predict distributaries rule of remaining oil with well logging information and other data.

On the basis of synthetically analyzing the routine geology information and development data, the potentiality of the area rich in remaining oil can be estimated quantitatively by the grey clustering analysis.

combining with production performance data, the paper applied dense grid and large-scale reservoir detail simulation technology to research and quantitative evaluate the distribution of remaining oil synthetically.

The methods of geochemical log and core extraction are identical on the evaluation of the distribution of the remaining oil through the comparison between the values of the oil saturation obtained by the above two methods.

The simulation model of oil reservoir is the effective technological means for displaying the three-dimensional evolution rule of reservoir in long-term waterflooding,predicting and estimating the distribution of remaining oil.

The key to increasing accuracy of reservoir description, delimiting distribution of residual oil and enhancing reservoir development is to know the reservoir heterogeneity. Here we introduce a new method of understanding and studying reservoir heterogeneity —— studying methods of flow units. Flow units have not only the same(similar) sedimentation characteristics, but also the same(similar) flow characteristics. The studying methods of flow units are classified into two kinds. One is core analysis method, the...

The key to increasing accuracy of reservoir description, delimiting distribution of residual oil and enhancing reservoir development is to know the reservoir heterogeneity. Here we introduce a new method of understanding and studying reservoir heterogeneity —— studying methods of flow units. Flow units have not only the same(similar) sedimentation characteristics, but also the same(similar) flow characteristics. The studying methods of flow units are classified into two kinds. One is core analysis method, the other is modifying equation of Kozeny Carman method. Steps are give about studying flow units and introduces application of flow units to reservoir evaluation, residual oil distribution, reservoir numerical simulation and permeability interpretation.

High salinity formation water contains large amount of chloride which has large thermal neutron capture cross section. Neutron lifetime log(NLL) is generally believed as a technique for information of remaining oil saturation, which is only adaptable to cased hole drilled through zones with high salinity formation water. In fact, borite is also easily dissolved in water and has a large capture cross section. If it is dissolved in low salinity...

High salinity formation water contains large amount of chloride which has large thermal neutron capture cross section. Neutron lifetime log(NLL) is generally believed as a technique for information of remaining oil saturation, which is only adaptable to cased hole drilled through zones with high salinity formation water. In fact, borite is also easily dissolved in water and has a large capture cross section. If it is dissolved in low salinity formation water by means of proper operation and dispensing, NLL can also be applied to obtain remaining oil saturation by its response to the large capture cross section. How to run NLL in low salinity zone and its application results in more than ten wells in mature oil field are given in this paper, mainly focusing on evaluation of pay zone current quality, estimation of remaining oil saturation,features analysis of the produced liquid and determination of zones of interest.

Residual oil distribution in high water containing oilfield is a worldwide difficult problem. Extensive attention has been paid to reservoir evaluation by using reservoir flow unit since the last of 1980s. In this paper, on the basis of sedimentary microfacies analysis, reservoir flow unit is applied to study remaining oil distribution properties in Block Huan26 of Liaohe Oilfield that is in the high water containing period. Cored data show that there is a favorable relationship between residual oil saturation...

Residual oil distribution in high water containing oilfield is a worldwide difficult problem. Extensive attention has been paid to reservoir evaluation by using reservoir flow unit since the last of 1980s. In this paper, on the basis of sedimentary microfacies analysis, reservoir flow unit is applied to study remaining oil distribution properties in Block Huan26 of Liaohe Oilfield that is in the high water containing period. Cored data show that there is a favorable relationship between residual oil saturation and reservoir flow unit, and the equation for calculating remaining oil saturation is established based on flow zone index(FZI). The microfacies is made up of various flow units. The assorted forms of various flow units and the seeping capacity are different among various microfacies. The result shows that flow unit is provided with advantage in describing plane otherness of fluid seeping and in evaluating distribution properties of remaining oil, and that the residual oil is distributed mainly over the central section and the relative high height of the east section of the faulting block. Obvious geological effect has been obtained in Block Huan26.