Comprehensive Scheme Of Numerical Simulation And Water Injection Adjustment In The Eastern Part Of Luo Pang Yuan Block

The Luo Pang yuan block is a typical ultra-low permeability lithologic reservoir.Since the start of development in 2010,the production contradiction of the target oil layer Chang 4+5 has gradually emerged.Some production wells have a decline in production,an increase in water content,and even violent flooding.It is necessary to determine the remaining oil-rich areas and re-adjust the water injection scheme.This paper focuses on the research in the eastern part of the Luo Pang yuan block.Firstly,this paper analyzes the geological conditions of the area,and uses the marking layer as the benchmark to classify the logging curves of all oil and water wells(divided into 4+5₁₁,4+5₁₂,4+5₂₁,4+5₂₂₁,4+5₂₂₂),using the reservoir physical method to correct the initial water saturation of the reservoir,and establishing the geological model of the eastern reservoir of Luo pang yuan.Secondly,based on the geological model,a numerical model was established and the history was fitted.The remaining oil was mainly distributed in the well area 1,the well area 2,and the well area 3.Then,for the convenience of research,a typical well area was selected in the area,and the geological model and numerical model of the typical well area were established.The variation characteristics and production dynamics of the production curve in the area were analyzed.Based on the typical well model numerical model,the water injection method,water injection pressure,injection-production ratio and water injection period are optimized.The necessity of encryption?or filling?is verified and the recovery factor of the reservoir was calibrated.Finally,the remaining oil distribution area is combined with the optimized water injection scheme to obtain the water injection adjustment scheme in the eastern part of the Luo pang yuan block:periodic filling of all oil wells in the well area 1,well area 2,and well area where the remaining oil distribution is concentrated?Note?Picking ratio1.0,inject 2 stop 1),the area of the well network is not perfect?encryption?.This paper has a guiding role in the remaining oil tapping potential and water injection scheme adjustment of similar reservoirs.