| More and more oilfield by waterflooding become old and high morbidity. The water enter underground always go by large pore paths in heterogeneous reservoivs. Rednces the swept volume of waterflooding, the residual oil underground is frgmented, adjust is diffcult increasingly. Now, thin oil and high ponr-point oil production will decline100-200thound tons per year. The "Twelfth five-year" project is change thin oil and thickened oil production ratio. This development mode can not ensure the sustainable and need to change in urgent. Deep profile controlling and flooding has become a very effective technical measures to control water and stable production. Polymer gel has good injection, penetration and application. It has been widely used in profile controlling and flooding. Polymer gel and swellable particles are widely used currently. Currently widely used particle in polymer gel and oil displacement system. Polymer gel is a low concentration of polymer oil displacement agent, crosslinking agent, reaction of polymer and crosslinking agent viscosity gets bigger, modulus of elasticity, strong sticky liquid, effective thickening, profile control. Body of granule gel system has the characteristics of encounter oil water absorption expansion without inflation, inflation after the particle has certain elasticity, under pressure from a certain displacement can be moved in the pore throat, through the accumulation of Bridges, achieve plugging high permeable zone, change flow direction and adjust the injection profile, and are widely used in high permeability, has a large concreted complete water channeling is serious or the existence of cracks formation. Movable gel particle/body composed of composite gel system have adjustable gelling time and strength, simple construction process, to the formation characteristics of strong adaptability, it retains the good common viscoelastic polymer gel, and the advantages of strong adhesion force, and learned the particle plugging agent type high strength characteristics, suitable for high permeability sandstone formation of injection profile adjustment and fissured formation water flooded, water governance.Ensure that liaohe oilfield thousand ton scale production, adjust the structure of oil production, exploring the way greatly improve water drive recovery efficiency has become the fundamental direction of the oilfield stable development.Deep displacement technology for secondary development one of the leading technology, is to increase the single well production and improve recovery factor is an important means. During the12th five-year, liaohe oilfield planning to carry out the field test,500well group implement each year100well group, deep displacement formula system research workload is big, long research period. Common research therefore need to carry out the deep displacement, different understanding of deep oil displacement system, the scope of application of based on block reservoir geological characteristics choose the appropriate type oil displacement system, shorten the formula system development cycle, to speed up the implementation process. According to different reservoir type, formed from the deep displacement types, system development, the influence factors analysis, effect evaluation and field test tracking scheme design, monitoring and adjustment of form a complete set of technology, and establish the quality control and test block with chemical oil displacement agent formula basic oil displacement system performance test methods.This report is aimed at different blocks of profile modification and oil displacement analysis of the current situation of oil displacement and deep displacement, general research for different flooding block reservoir geological characteristics, development status quo, formation temperature, and fluid properties and using conditions and features of various oil displacement systems, identified as closure, adjustable, displacement, the integration of the idea for the personalized design of profile modification and oil displacement. Clear study target, making the research route and work plan, application of existing experimental equipment and method, the evaluation of oil displacement system technology, the universality of the formulation study, completed block B oil displacement system of personalized design, set up quality inspection and test block with chemical oil displacement agent formula basic oil displacement system performance test methods. According to the research plan calls for completed all the research content, the desired goal. Deep displacement technology can effectively ease the B block waterflood later reservoir development contradictions at present, further improve the waterflood development effect. Through the comprehensive and systematic study, to further improve oil displacement form a complete set of evaluation technology, provide technical support for the oil displacement research in the future. Also for the other to enter "twin period" waterflooding reservoir slow decline, stability and improve the single well production to provide technical support and technical reserves. |
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