Research On Production Series Adjustment And Multi-Layer Equilibrium Displacement In H148 Block

The low perm turbidity sandstone oil reservoir always has many layers and extends long distance in the vertical direction,after these reservoirs develop for a long time,the displacement efficiency of the reservoir decreases and the decline rate of the oil well production rate accelerates due to interlayer interference and weak multi-layer equilibrium displacement.The layer combination system before is not suitable for the development at present any longer.The paper carry out research on production series adjustment and multi-layer equilibrium displacement based on S3Z2-5 sand sets of the low perm turbidity sandstone oil reservoir in H148 block aimed at solving the interlayer interference and weak multi-layer equilibrium displacement.At first,based on the of the H148 block,we evaluate the effect of water injection at present and point out the major problem during the development.Second,optimize economic limits and technical limits by using reservoir engineering method and numerical simulation method,and then get the results of the limits for reserve abundance,reservoir thickness,permeability range,distance and distribution between two layers,also,the range of the degree of reserve recovery and pressure holding level between two layers.Then get four main evaluating indicators for series adjustment based on three dimensional numerical simulation model of H148 block,multiple correlation analysis principle and analytic hierarchy process.And at the same time get result of weight analysis,establish the series adjustment system.by using the achievements we get,we establish the plan for series adjustment in H148 block,compared with the plan before wo get fine development.at last,by using the radial drilling technology,optimize the length of radial drilling hole for getting fine development.Based on all the study,series adjustment and radial drilling technology can improve the effect of exploration in H148 block.In summary,the paper establishes one effective way to solve the interlayer interference and weak multi-layer equilibrium displacement,and will have important value for guiding the kind of the reservoir.