Geological Characteristics And Development Effect Evaluation Of ShuGuang Oilfield

Shuguang oilfield is 50 years old oilfield,from the start of heavy oil steam stimulation experiment successful at Shu1-3532 Wells of Shu 1-7-5 block in June 1983,in the Shu 1-7-5 block,Du 80 block,Du 84 block gradually expand the scale of thermal recovery of heavy oil steam,at present most reservoir has entered the stage of takanawa time stimulation,production decline,cycle oil steam ratio is low,the validity of short,in order to improve the current mining methods under the use level of mining reservoir potential,the rational allocation of steam injection volume,improve economic efficiency,stimulation of the region development geological characteristics,the current stimulation stage of thermal recovery and steam absorption condition and the change of formation pressure in conducting the research.Reservoir of the single layer thickness is an important factor affecting reservoir development effect,on the basis of reservoir thickness of single layer will dawn area of heavy oil reservoirs are divided into block bottom(top)water reservoir,thick interbed reservoir of oil group,thin interbed reservoir of oil group,thick-thin interbed reservoir and Qianshan bottom water reservoir,the bottom water reservoir,and combining with the characteristics of stratigraphic structure and sedimentary characteristics,reservoir characteristics,reservoir distribution and fluid properties,flow characteristics and reservoir distribution characteristics of oil reservoir has carried on the comprehensive research,selected ordinary heavy oil reservoir in the representative of the typical reservoir as the research object,its throughput production characteristics,throughput,influencing factors and preventive measures in the process of development are studied.Final comprehensive comparison and analysis of existing mining mode of oil production,stable production period and decline rate,recoverable reserves and recovery degree,the present stage calibration recovery rate and other indicators,using the method of exponential decline,cycle production rule method,regressive model three output prediction method,for ordinary heavy oil in du 66 block,such as the start of the 1-7-5 pieces of heavy oil,this phase of the cycle of du 84 block such as production rule,development index change rule,reserves producing condition,reservoir formation pressure change rule,recovery efficiency evaluation index are studied,and the objective of development effect evaluation and forecast development trend.