中低孔渗油藏长距离干扰试井研究

Low permeability reservoir of long-distance interference well test research

惠州油田21-1区块油气储层属于中低孔渗油藏,为获取该区域相距2km两口井的连通情况,利用惠州21-1-18井常规DST一开和二开作为测试信号,在老区21-1-17d井中下入高精度存储式压力计并关井较长时间,通过压力计数值读取的结果观测21-1-17d井不能接收到压力脉冲信号。干扰试井一般应用于500m距离进行测试,该次进行2km长距离干扰试井较为罕见,且使用高精度压力计去获取中低性能孔渗油藏数据,更是干扰试井中极不常见方法。此次研究证实了在2km距离的中低性能孔渗油藏,连通性无,不能有效捕捉到压力脉冲信号,为长距离干扰试井测试提供了一定研究依据。

Huizhou oilfield21-1block oil and gas reservoir layer belongs to low porosity and permeability reservoirs,in order to obtain the region distance of2km in two wells connectivity by Huizhou21-1-18wells of conventional DST opening and opening as a test signal,in old21-1-17d wells in the middle and lower in high precision storage pressure gauge and shut in for a long time,through the pressure meter read numerical observations21-1-17d wells can not be received pressure pulse signal.Interference test is generally used in500meters away from the test,the time were2km long distance interference test is relatively rare and using high precision pressure meter to obtain low performance of porosity and permeability of reservoir data,is even more disturbed in well testing is extremely common method.This study confirmed that the low permeability reservoir with2km distance,which has no effect on the pressure pulse signal,can effectively capture the pressure pulse signal,which provides a certain research basis for long distance interference test.