Fine Reservoir Description Of Mu 125 Block

Mu 125 block is the main area of Mutou reservoir in Jilin oil field, which is a typical reservoir with"three being low", low abundance, low permeability and low production. Located in Huazijing Step structural belt of Fuxin uplift belt at central depressions in the south of Songliao basin, the block is in the early oil field development stage with short producing time and low recovery percent. Because reservoir had serious heterogeneity and regional casing deformation, water injection wells can not realize separate injection, the contradictions of interlayer and plane was very prominent, and the effect of water flooding development was influenced, injection-production well pattern can not admit the need of block development.In the paper, under the guidance of the theory of petroleum geology, sequence stratigraghy and sedimentology, using the technology of fine structural interpretation in 3D seismic data, subdivision and comparison of reservoir, sedimentary microfacies and reserves accounting comprehensively, the rule of residual oil distribution of Mu 125 block was recognized further with dynamic and static data, and measures of preventing and treating regional casing deformation were made. Secondary development of Mu125 block was conducted, well pattern was adjusted entirely. From drilling course, casing choosing, cementing method to production horizon, later management of water flooding, pressure maintenance of reservoir, measures of preventing casing deformation were all considered. Looking from logging curves of 29 new wells, curve amplitude was matched to the old wells of primary development basically, washed indication was found only in two wells bottom reservoir, which illustrate that residual oil cognition established on the bases of fine reservoir description is a great success, and offer a solution to the oil adjustment and treatment of fine reservoir description, residual oil cognition, and regional casing deformation in other similar oilfield.