Study On Geological Recharacterization And Developent Adjustment Plan Of Block Lu46

Lu46 fault block is a key development adjustment block under the cooperative development project Department of North China Oilfield Company.In the early stage,this block belongs to the area of No.3 oil production plant.There are 14 old wells over 20 years of exploitation in this area,At present,there are totally 11 oil production wells,four of which are opened,with daily liquid production of 17.5t,daily oil production of 2.8t and comprehensive water cut of 84%.The technical orientation of old oilfield development and adjustment is to reconstruct underground cognition system,reconstruct well pattern structure and reorganize surface technological process.Due to the complex faulat and structure system,sharping oil-water problems and non-uniform oil-bearing layer position of lu-46 fault block,the stratigraphic correlation and division are carried out again,and the boundary and breakpoint position of strata in the whole area are determined;the oil formation refinement study guided by sedimentary facies is carried out to study the sand body distribution characteristics;the reservoir distribution understanding and reserve recalculation are carried out;and the reservoir area is deepened Through three-dimensional geological modeling and other methods,we have a new understanding of the underground situation of Lu 46 fault block.According to the re calculation of the reserves of Lu 46 fault block,the study area still has a huge development and adjustment prospect.It is expected that the research area can become the main production block of the cooperative development project department after development.Due to the low degree of development in the study area,through the production analysis and economic benefit calculation before and after infill well location of adjacent fault blocks,the development adjustment of Lu 46 fault block has played an empirical analogy role.Through the calculation of well spacing,new production capacity and the ratio of oil and water wells,the well location plan for development adjustment is completed: 38 new wells are planned to be drilled in block Lu 46,in which seven old wells are used,31 oil wells and 14 water wells are expected;through the study of development strata,perforation thickness,in-situ stress direction and pressure level in the study area,the well location adjustment plan is completed according to the experience analogy and calculation of adjacent fault blocks,the parameters such as water injection rate and pressure are determined.