河道砂体刻画技术在彩南油田头屯河组中的应用

Channel sand identification in Toutunhe Formation,Cainan Oilfield

受地震分辨率的影响,常常成为优质储集体的河道砂体准确刻画难度较大。为此以准噶尔盆地彩南油田头屯河组曲流河河道为例,在层序地层格架约束下,依据钻、录、测等井资料,结合河道砂体地震响应特征,采用GeoEast软件的多属性综合分析、分频解释、地层切片、三维立体雕刻等技术精细刻画砂体,实现对彩南油田头屯河组河道砂体的识别与精细刻画。实际钻井结果表明,在彩南油田侏罗系头屯河组应用本文提出的河道砂体识别与精细刻画技术取得了成功,钻遇河道成功率达90%。

Channel sand bodis are usually high-quality hydrcarbon reservoirs.However,it is difficult to accurately describe them due to low resolution of seismic data.To overcome this problem,we use interpretation tools provided by GeoEast System to characterize Toutunhe Formation in Cainan Oilfield,Junggar Basin.Under a sequence-stratigraphy-constrained framework,sedimentary system development characteristics are analyzed with a joint use of logging,drilling,and seismic data.Channel sands are characterized with a few interpretation approaches such as multi-attribute analysis,frequency-dependant interpretation,strata slice,and 3 D visualization.The drilling results show that our channel sand characterization has made great achievements,and the successful drilling rate is up to 90%.