| The East Block of Dongpu Depression Wenliu Oilfield Wen 25 belonging to the deposition of heterogeneous land oil and gas block, reservoir heterogeneity, after twenty years of flooding, exacerbated the degree of reservoir heterogeneity and fluid non-all quality level of the reservoir show a strong non-homogeneous and anisotropic, scattered distribution of remaining oil, post-tap the potential difficulty. Thesis research is the high water cut fields of technical problems need to be resolved. Complex fault block on terrestrial reservoir description, quantitative characterizati- on of the distribution of remaining oil to study the development of heterogeneous reservoir water flooding the late distribution of remaining oil and tapping the potential method. The main results are:1. By flattening and hole level simulation techniques, DISCOVER reservoir correlation technology, 126 wells of the study area were calibrated about sequence, parasequence, sand sets,and time units by a single sand body divided, at the same time the muddy content, median grain size, porosity, permeability, initial oil saturation and other parameters were predicted.2. Focus on a different scale (sand group, time units) the probability of sedimentary facies, in combination with the actual situation in the major reservoirs in the region is subdivided into underwater distributary channel, distributary channel, the underwater distributary channel flank, underwater natural barrier and other underwater splay microfacies 5.3. For the purpose of the study area the reservoir layer and the infiltration of macro and mi- cro physical parameters change in the law of the development process are described, analysis, development of the area with water injection, variable reservoir property significantly positive trend. The average porosity of which increase 0-4%, an average increase of 30% penetration rate. Reservoir clay content, silt content decreased.4. GOCAD three-dimensional modeling software was used for the purpose sand layer 9 groups of the study area to establish a fault, structure and properties of reservoir parameters (porosity, permeability, initial oil saturation, reservoir shale content) model.5. Using a variety of methods of mass density from the qualitative to the quantitative simulation of fine grid residual oil distribution. Pointed out the impact of residual oil remaining oil distribution area and the main factors, the distribution of residual oil that are four types: (1) imperfections caused by the flooding pattern in the remaining oil-rich region; (2) interlayer homogeneous layer caused by the relative difference remaining oil; (3) structural high position and influence of local hydrodynamic retention fault zone; (4) heterogeneity within the reservoir layer caused by the hydrodynamic retention area. 6. Wen 25 East blocks for development of reservoir geology features in the remaining oil, based on the idea of tapping the potential and measures proposed: (1) detailed structural study, late in the development of additional storage to achieve Rolling Extension. Of the large displc- ement dual-target directional technology in the near-fault high position to deploy a total of 12 adjustment well, put into effect. (2) for the heterogeneity of the proposed reservoir development of old well turn injection, tube sealing, repair and other technology to restore damaged areas and optimizing the well injection patterns to improve the degree of water flooding control and use; old wells drilled through the side and in the water area separate injection wells to enhance the deployment of work to improve two, three producing extent; for the next 1-5 S2 layer of thick oil into the water main line along the high permeability zone water channeling, the small thickness of water flooding , the problem of low displacement efficiency, the application layer of the deep injection well profile control technologies to expand the waterflood sweep volume, tap the top of the remaining oil potential in thick oil. |
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