Late Reservoir Description. Development Research And Development Adjustment

To solving the relative problems of reservoir description and development plan regulation in the maturing field, taking Gaoyang 30 fault-block oil reservoir as an example, with the residual oil distribution as center, this thesis makes an extensive study about the stochastic prediction modeling for the river facies sand-body, reservoir simulating and the regulation methods of improving water-flood efficiency adopting the methods of the combination of geology, log, seism and reservoir development research, reservoir static prediction and performance analysis, reservoir performance research and reservoir simulation. Though the study, the thesis establishes the study program and the method system from stochastic modeling to reservoir development plan regulation, which has great significance on the theoretical research and practical application of reservoir description and development regulation in the maturing field.Genesis of reservoir is the geologic setting of influencing the residual oil distribution. So, under the guidance of modem sedimentology, by means of the theory and method of high definition stratigraphie geology, this thesis discerns the single sand-body and determining the horizontal continuity of sand body in the river facies, establishes the primary model under the condition of high density wells, analyses the elements and mechanism of affecting the residual oil distribution in sandstone reservoir according to the geologic origin and development condition.Secondly, on the basis of establishing reservoir model, the thesis chooses the method of the combination of seismic inversion and stochastic modeling, which is a valid method for rebuilding the reservoir model, establishes the huge model of the reservoir and three-dimensional reservoir prediction model which provides a reliable qualitative geologic model for reservoir simulation. At the same time, according to the result of reservoir modeling, This thesis builds the reservoir parameter model by use of the upscaling, and through the study of reservoir simulation, the thesis describes the residual oil distribution qualitatively and quantitatively, and predicts the development efficiency for different development regulating plans, which provides scientific ground for flood pattern modification and flood development regulation.Finally, through analyzing the development characteristic of Gaoyang 30 fault-black oil reservoir, the thesis evaluates the production performance of this reservoir, and comes to the understanding of high water cut being an important water-flood development stage for Gaoyang 30 fault-black oil reservoir. Therefore, it is very important to improve the efficiency of water-flood development for medium-high water cut reservoir. The thesis gives 4 suggestions on development of Gaoyang 30 fault-black oil reservoir, which are enhanced water-flood development, performing water injection profile control and water shutoff in the deep location, cyclic flooding test, and reservoir performance monitoring. These conclusions above are very important and significant to reservoir development plan regulation next.