Residual Oil Distribution And Adjustment Scheme Optimization

Main research contents for the formation, structure, sedimentary microfacies, sand body distribution characteristics and oil and gas distribution rule and water flooding development effect analysis and evaluation, residual oil distribution, the injection production wells scheme design.A large number of geological survey work was carried out during the study period, including: formation division and correlation and- lithology, fossils as the basis, make full use of seismic, drilling, logging and core analysis data, in order to stabilize the sign layer(layer) as the control, the cycle correlation, hierarchical control system of comparative method to ensure all levels of sedimentary cycles correspond to each other, determine the formation, sandstone group, low layer, compared to improve the accuracy. In standard well as the center, the establishment of lithology and electric sign layer and the auxiliary marker bed, then calibration, tracking and contrast, from point to line, from line to the surface, to establish the block of standard stratigraphic section, fine stratigraphic correlation of all wells in the district; structural interpretation- select multi standard well accurate horizon calibration, by combination of well and seismic data, the structure is confirmed, complete S1, D3 II, D3 I, D2 II, D2 1, D1 is on the top of the structure figure 6.At the same time, a lot of statistical work is carried out, including: combining core data and logging data, the main oil sand body sedimentary microfacies research, determine the micro phase type. The relationship between the standard of log facies and its sedimentary microfacies. Preparation of sedimentary facies section and sedimentary microfacies plan. The sedimentary features and the distribution of sand bodies of different microfacies are described in detail.Reservoir lithology, physical property, connectivity, inter layer heterogeneity of layer, research. The distribution of reservoir in the profile and the plane is defined, and the reservoir is evaluated by the small layer.. The distribution map of the oil layer, sandstone and small plane is completed in the sub layer, and the exploitation stage is divided into the development stage and the mining characteristic of different stages is analyzed.. According to the industry standard on waterflooding effectiveness evaluation for three types of level and pointed out that at present, the main problem is the injection production system is not perfect; the oil well effective analysis, tracer, sedimentary phase in different stage of water cut oil-water movement regularities. The results show that the distribution of the remaining oil in the middle and low water period is mainly controlled by the sedimentary facies, and the main water cut stage is mainly controlled by injection production wells..Based on the calculation results, according to the structure, reservoir, and the distribution of remaining oil, the two and Eastern three stages of the comprehensive adjustment and adjustment are provided...