Study On Development Rules Of Volume Fracturing Horizontal Wells In Tight Conglomerate Reservoirs In Mahu Area

The Mahu block studied in this paper is located in the northwestern margin of Junggar basin,which is recognized as a hydrocarbon-rich depression area with great potential for development,covering an area of nearly 5000km~2.However,most of the reservoir in the Mahu area is a dense sand conglomerate reservoir,so it is of great significance to understand the development rules correctly and carry out effective development.In this paper,the reservoir characteristics of the Mahu block are investigated,and the regional geological conditions,reservoir physical properties and reservoir space characteristics of the dense conglomerate block are sorted out.Then the production situation and characteristics of the Mahu block are analyzed,and the production rules,main controlling factors of production capacity and fuzzy seepage mechanism in the reservoir production are found.The reservoir is divided into three types according to different factors such as initial production of oil well,and the relationship between production performance data and production engineering parameters is used to analyze the influence of main control factors and fractures on productivity.Then,the production decline law of the three types of reservoirs was analyzed by using the three empirical formulas of Arps,Duong and SEPD,and the characteristics and fitting conditions of the decline rate of the three types of reservoirs in the first,middle and later stages were analyzed,and the applicable decline prediction methods of the three types of reservoirs were selected by using error analysis.For the study of manasseh lake compact conglomerate reservoir fracturing of horizontal well productivity factors,analysis of fracturing horizontal well flow,considering the non darcy flow,formation stress sensitive factors,dynamic phase shunt capacity model of fracturing horizontal well is deduced,finally application model to fit the typical reservoir combined to study the effect of single factor on reservoir productivity,in the end of the lake district piece of compact conglomerate horizontal well development rule has carried on the detailed comprehensive study.