Study On The Main Controlling Factors Of Decline In Increment And Stock In Different Types Of Reserviors In Jiangsu Oilfield

This topic based on the current oilfield development changed from mainly rely on investment to expand increment to rely more on the present situation of the stock and optimize increment,using the stock of incremental data platform,classification statistics stock of incremental production and main development index,According to the characteristics of different types of reservoirs,the main control factors of the decrease of incremental stock are evaluated through the field statistical method.On the basis of this,several factors of decreasing model are studied,and the incremental decline model of different types of reservoirs is established.At the same time,The research of different types of reservoir control reduction technology is carried out,and the main measures to reduce the control decline are put forward,and the theoretical basis for optimal increment,for oilfield development planning,flexible production deployment and provide a basis to determine the indicators of development.Five main achievements are as follows:1 The system of stock and increment data has been established and perfected.This paper studies the increment of different planning stages,the increment of different oil-bearing strata and the increment of different adjustment purposes in the old area,and establishes the initial decline model.2 Using the grey correlation method,the main control factors of the increment of the new area and the old area were studied respectively.The main factors affecting the incremental decline rate of the new district are the formation pressure,the average effective thickness of the oil layer,the number of injection-production Wells,the initial water content and the average permeability.The main factors that influence the decline rate of the old area are formation pressure,initial moisture content,well network density,average effective thickness of oil layer and average permeability.3 By analyzing the decline rate of the old area in different periods,we get the main factors that affect the stock decline.The main factors are the completion degree of injection and production well pattern,the number of well opening,the increase rate of water cut and the growth rate of liquid production.4 By analyzing the decreasing rule of different types of reservoirs,a decreasing model of multiple factors of different types of oil reservoirs is established.5 By studying and grasping the development rules of different types of reservoirs,the influencing factors were analyzed,and the main technical countermeasures were put forward.