Research On Geological Characteristics And Adjustment Plan Of ZH16 Fault Block

The ZH16 fault block is a medium-porous,medium-low-permeability fault-block reservoir.At present,during the development process,there are problems that the water cut rises faster and the oil displacement effect deteriorates.Measures need to be adjusted on the basis of geological re-understanding to improve the development effect.Based on the systematic study of the geological characteristics of the ZH16 fault block,this paper clarifies the remaining oil distribution and formulates development adjustment plans to provide technical support for mine production.Based on the analysis of the geological characteristics of the ZH16 fault block and the existing problems in development,the paper uses seismic data to determine the internal characteristics of the structure,and clarifies the distribution of reservoir sand bodies through stratigraphic correlation and sedimentary microfacies research to provide a geological basis for reservoir development;Dynamic analysis,clarify the characteristics of water-flooded layers and remaining oil distribution rules in fault blocks,refine the remaining oil potential;rely on fine water injection,optimize the design of reservoir adjustment schemes,and improve the degree of water driving and recovery.The research results show that the lower part of the target interval Es₃³ is divided into 11small layers and 11 single layers;the Es₃^4-1 member is divided into 4 oil groups,of which theⅠoil group is divided into 7 small layers and the second oil group is divided into 4 TheⅢoil group is divided into 7 small layers,and theⅣoil group is divided into 9 small layers and 12single sand layers;the main production interval of Es₃^4-1 MemberⅢoil group has large geological reserves,low recovery degree,and remaining The oil is the most abundant;the first oil group has large geological reserves,although the recovery degree is high,there is still abundant remaining oil,the second oil group and the Es₃³ member have a low degree of development and have a large remaining oil potential;optimized design for hole replenishment,profile control and flooding,Plugging,re-injection,re-production and other development adjustment measures,it is predicted that after the implementation of the measures,the daily oil production will increase from 45t to 88t,the comprehensive water cut will stabilize at 80%,the recoverable reserves will increase from 1.115 million tons to 1.234million tons,and the recovery rate will be improved 2.8%.