苏里格气田开发选区技术探讨

针对苏里格气田目的层储层横向延伸窄,空间分布不连续,低孔、低渗特点,在储层沉积微相、储层综合预测以及排烃期古构造研究基础上,提出了苏里格气田储层相对富集区块优选依据,并在此基础上,提出了开发苏里格气田的综合选区技术。应用该技术在鄂尔多斯盆地东部的太原组进行区块优选,取得了良好效果,表明该技术适用于鄂尔多斯盆地低孔低渗碎屑岩气田开发。 

Thermal Recovery Effect Evaluation of Multi-thermal Fluid#br#Stimulation in Offshore Heavy Oilfield

Oilfield A is the first pilot test spot of thermal recovery in offshore unconventional heavy oil field. The developmenteffect will directly affect the future development of offshore unconventional heavy oil resources. Based on production performanceof thermal recovery well in Oilfield A,the influence of edge water on the development effect of thermal recovery wellswas analyzed,and we proposed distance from thermal recovery well to edge water to be more than 200～300 m. A comparisonbetween normal and thermal production of the same well,and between the production of thermal recovery well and adjacentnormal production well in the same layer showed that early productivity and the first annual oil production of thermal recoverywells are both 1.5 to 2.0 times as normal production wells. Integrated evaluation method was performed using bottom holetemperature and productivity index data,and we analyzed the valid period of thermal recovery well,which is between 240 to339 days,298 days on average. The values of cycle average capacity,oil production and oil-steam ratio were compared to thepre-drilling design value,and the results showed that without considering sand control technology,drill string problems andreservoir property change,thermal recovery wells have reached the expected results of the first cycle,with the average capacityof 5 m3/d,cycle oil production of 1.80×104 m3;and the incremental oil production of 0.7×104 m3. The thermal recovery effectof multi-thermal fluid stimulation is obvious,and will guide the development of other offshore unconventional heavy oil field.