Applied Resarch On Deflagration Fracturing And Acidizing Technology In Low Permeable Reservoir In Oil Field Lufeng

In order to solve the problem of high injection pressure and low acid displacement emerged during the development of Oil field Lufeng,this paper introduced deflagration fracturing and acidizing technology(DFA)to the area.Studied the history and application at home and abroad of this technology,established the deflagration fracturing mechanism model and compiled a set of construction design software according to it.Carried out the deflagration engineering experiments,analysed the resons for the failure of conventional enhancement measures taken in the target zone and demonstrated the technology’s feasiblility from both the aspects of safety and effectiveness.Optimilized a kind of acid named as LF-G2 using four-stage ionized acid and modified silicic acid as its main components.Took well LF13-1-B as example,came up with a complete method of DFA construction design.The method includes the collection of parameters required,the combination of column and the construction designing process.Analyzed the effect of DFA used in well B.The result shows that under the same pressure,the acid displacement is 9.45 times of whitch before the construction,thus the average daily production is 2.5 times of whitch before construction.This paper shows that the DFA is a kind of high efficiency,low cost and low risk technology for low permeability,near bottom water and thin reservoirs in off-shore oil fields.It has a good future application in offshore oil fields in China.It provides a new reference for efficient development of low permeability reservoirs in offshore oilfields in China.The experimental part of this research partially compensates for some of the long time vacancies in this area.