Liu Chu Oilfield Reservoir Delicate Description Research And Application

Liu chu oilfield enters into high water level of extraction, height scattered distribution of remaining oil, except by the sandbodies permeability heterogeneity influence outside, the sandbodies fold buy relations and planar interconnection forms of remaining oil distribution mode and effect is also very important. In order to accurately describe residual oil distribution, this paper research levels unit has past compound sand body into the single sand body, make fine single sand body description and permeability heterogeneity describe the organic union, for oilfield later production dynamic analysis and various adjust measures to provide geologic foundation. In this study, the emphasis is on the basis of previous research achievements, on reservoir sedimentary theory as guidance, single sand body tracking contrast model for technical means, by identifying the vertical sedimentary intermittent surface, determine the single times according to sedimentary units, plane well logging curves forms, prosodic feature and sand body the transversal change trend, should determine the between sandbodies connecting relation and plane combination characteristic, realize the single sand body fine anatomy, accurate description sand body spatial distribution and vertical fold buy relationship. Through to leave chu oilfield part main compound sand body, we found that:plane, bedding face accumulates distribution continuous compound sand body, through identified in times single channel sand body microfacies belt figure fibers, close, can identify which internal phy-sical becomes poor belt; Hang up, through a single times sedimentary intermittent surface property characteristics analysis, time between sandbodies were not connected, weakly connected or strong even full-bodied. Anyhow, sheet sand body fine anatomic results in a certain extent, not only make the sandbodies heterogeneity formation mechanism research deeper, and improved in some degree of connecting relation between sandbodies cognition degree, as the analysis of oil Wells by effect direction has certain directive significance.Due to the compound sand body innovative realized in many times sedimentary sand body identification and tracking with graph microfacies socio-semiotic close, fine describe the single sand body surface exhibition cloth scale, lateral migration characteristics and spatial connection relation, make the sandbodies oil-water distribution characteristics and residual oil distribution mode study further. Tentatively summed up leave chu oilfield compound sand body of remaining oil distribution mode:one is the sandbodies phy-sical becomes poor belt, the worse with water injection development of effective degree is poorer, for residual oil enrichment; Second is the oil Wells between sand body appear not connected and weak body, even for not water flooding or water flooding effect for the remaining oil enrichment; bad, Three is affected by oil-water gravitional separating, thick sand body top for residual oil enrichment.Based on this understanding, the remaining oil distribution of high water-cut stage remaining oil redevelopment has important guiding role. According to the compound sand body exist different of remaining oil distribution pattern, targeted to take corresponding measures, such as tapping phy-sical becomes poor zone in the remaining oil, can implement high-dose depth adjustable flooding, improve planar water flooding and improve the worse with water flooding effect; For injection-production crosswell sandbody connecting status difference to form the remaining, with single sand body for implementation object, fine argumentation injection-production patterns don't adjust, increase water flooding direction, improve water drive control degree. Anyhow different types of remaining oil, take different treatment countermeasure, effectively improve the oilfield of remaining oil redevelopment effect.