Study On Optimized Design Of Deep Profile Control And Flooding Scheme In Block ? Of Qingxin Oilfield

After more than and 10 years of water injection development,the distribution of underground fluid in the ? block of the new oilfield is becoming more and more complicated.Due to heterogeneous reservoir development,injection fluid priority from the small resistance of high permeability area breakthrough,after repeated erosion to form inefficient circulation channels,increase the reservoir interlayer and intralayer heterogeneity contradiction,mining become more and more difficult.At present the main reservoir of this block has entered high water cut stage,water flooded degree is serious,the most comprehensive water cut oil rate has reached more than 85% new wells also exposed water rising too fast,stable and difficult problem,but the oil recovery rate of only 18.4%,low area still has a large amount of residual oil has not yet spread to to solve the above problem,design a set of suitable for the area of deep profile control scheme.According to the Qing ? block new fields of satellite formation property and actual field test design overall profile control and water shutoff scheme,and developed a new profile control system and a comprehensive evaluation of their performance;using the simulation method of several major factors affecting reservoir value of further flooding effect are analyzed,thus the prediction of the flooding effect,according to the overall effect.For this block reservoir core components and fluid physical properties of early screening for this block displacement system: 2 particle system;4 kinds of gel system,two kinds of particles were asphalt particles and suspended particles;four kinds of gel were JLJ-2,kipor deep profilecontrol gel profile control oil,Tektronix HLX-19 chromium gel.System of cross-linked polymer,by orthogonal combination of 8 kinds of system.Using the method of physical experiment to optimize the system combination,the optimal number of slug and slug injection timing in the optimal system based on Simulation for numerical lay the foundation for the next step back,for the Qing satellite ? new oil reservoir block properties and geological characteristics and statistical results,obtained with the field data to flooding wells the same,should be flooding wells W2-28-19,W2-29-17,W2-30-16,W2-31-15 of the four wells depth profile,and found that the application of this technology,can effectively prevent water channeling and improve the sweep coefficient into the corresponding flooding layer,improve the oil displacement efficiency of oil well,the water absorbing capacity of the reaction,so as to improve the the recovery rate based on the geologic features full understanding on the establishment of three-dimensional geological model and numerical model,and complete the history matching,and combined with the remaining oil distribution of sedimentary facies data.The remaining oil distribution is given and the reference for further profile control is given.Based on the accurate numerical model on the study of flooding agent concentration,plugging rate,flooding radius,flooding time effects of several factors on flooding,provide technical reference for optimizing the flooding process,using the numerical model on the effect of flooding flooding index from oil well group,target or block,the cumulative oil production forecast.Using the principle of technical economics,considering the satellite ? block and flooding into effect,combined with the prediction results of output model,finally from two aspects of technical and economic considerations,are suitable for adjusting Qing best new flooding.