Reservoir Geological Modeling And Evaluation On Exploitation Effect In The Middle Triassic Reservoir Of YT2 Area, Tahe Oilfield

The middle Triassic Reservoir of YT2 Area of Tahe Oilfield as subsequent capacity building well area in the rolling development of Tahe Oilfield, whose commission time is shorter, its geology condition needs further in-depth understanding, and there needs in-depth awareness about features of both reservoir structure and reservoir distribution before the development plan is adjusted.This paper starts from research of the basic geology, with the quantitative methods of reservoir description, based on the dimensional geological modeling, integrated with the data of dynamic development, and made analysis of the reservoir producing characteristic including oil field production performance analysis and effect analysis of water injection response.The study used Petrel software to establish the static reservoir model, which contains the fault, construction, small layer stratigraphic framework model. In the process of the modeling about fault model, established three-dimensional fault model of the well area mainly based on interpretation of seismic fault zone. Based on the fault model, the study integrated with three-dimensional seismic interpretation, used Kriging interpolating technology to make the structural model. As to reservoir property modeling, this paper, based on and small layer of sedimentary facies distribution, used deterministic modeling to establish sedimentary facies model. And then rested on results of a single well log interpretation, based on a variety of reservoir parameters and the comprehensive level of heterogeneity distribution to set the direction of the value of different calculation methods, proposed the development of horizontal well reservoir model plane unit mesh, used phase-control modeling technology to establish porosity three-dimensional model, and then permeability and water saturation model were established by using cokriging technique. At the same time, the optimization for property model has been made and the reserve volume has been calculated to improve the accuracy of reservoir description and provide the basis for numerical reservoir simulation latter. In view of research of development effectiveness, this paper studied geological factors which influenced development effectiveness heterogeneity and interbed firstly. Heterogeneity mainly performs in a hypertonic section and a relatively low permeable section vertically, and hypertonic segment which is focused on middle and lower, has a certain correspondence to the rhythm of the reservoir. Then analyzed the current problems in the development and production fell well area or low-yield wells factors combined production performance data. Thesis evaluated on the formation energy, and analyzed the water content variation and the well area of well reasonable productivity of the vertical well and well reasonable productivity of the horizontal wells, analyzed the impact factors of horizontal wells reasonable productivity, calculated reasonable well pattern, well distance, and the development potential is also analyzed.