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靖安油田长4+5、长6油藏部分油井伴生气含量较高。从开采特征角度看,目前地层和生产井底附近脱气现象严重,伴生气产量较高,一般为原始溶解气油比的1～3.5倍;地层压力高的井比地层压力低的井产气量低。从伴生气的组成看,套管气量占总气量的2/3以上;随着含水率的上升,伴生气产量越来越低,当含水率达到70%以后,产气量很少或基本不产气;产气量变化有着明显的阶段性特征。根据测试研究,大路沟二区、白于山区套管气占总伴生气量的1/2～2/3,要充分利用好伴生气资源,就必须要解决伴生气、套管气的回收和利用问题。目前比较成熟的回收利用套管气的工艺技术主要有3种,即定压放气阀回收工艺,对储罐加温、降回压井组取暖工艺和安装燃气发电机工艺。
Jing’an Oilfield Chang 4 +5, Chang 6 oil reservoir associated gas content higher. From the mining characteristics point of view, the current formation and production near the bottom of the well degassing serious associated gas production is higher, usually 1 to 3.5 times the original dissolved gas-oil ratio; wells with higher formation pressure than the formation pressure wells gas production low. From the composition of associated gas, casing gas accounts for more than 2/3 of the total gas flow; with the increase of water cut, accompanying gas production is getting lower and lower, when the water cut reaches 70%, the gas production is little or basically not produced Gas; gas production changes have obvious characteristics of the stage. According to the test and study, the second district of Daluogou and the casing gas in Baiyunshan occupy 1/2 ~ 2/3 of the total accompanying gas. To make full use of associated gas resources, it is necessary to solve the recovery and utilization of associated gas and casing gas problem. At present, there are mainly three kinds of process technologies for recovering and using casing gas, namely, the process of recovering the fixed-pressure blow-off valve, warming the storage tank, lowering the heating process of the kill well and installing the gas generator process.