Research on Application Design of Deep Profile Control and Flooding Technology in Well Block A

The front facies deposition in T oilfield is the main one, and the development target layer is oil layer I, which belongs to medium porosity and medium permeability oilfield. Narrow strip and branch distributary channel sand bodies are developed in Block A. After the main sand body oil layer is flooded, the water content rises rapidly. At present, the comprehensive water content has reached 84.8%, while the recovery rate is only 20.3%. The contradiction between inefficient and ineffective water injection cycle is prominent. Innovatively implement LHW nano-micron microsphere deep profile control and flooding in the narrow strip development block with serious water flooding in the main sand body reservoir in the north of T oilfield, re-quantize the remaining oil distribution according to the numerical simulation results, design multiple slugs and multiple rounds of injection, optimize the swabbing parameters, and take timely measures to lead the effect [1, 2]. The remaining oil in this block is scattered, the control degree of water drive is 82.8% (the ratio of two-way and multidirectional connection is 53.4%), and the effective thickness ratio of water absorption is 92.2%. The effect of conventional water injection adjustment is not obvious. Therefore, the deep profile control and flooding work is carried out to improve the water utilization rate of injection and improve the development effect of the block.