本文關鍵詞： 曲流河 河道 點壩 不確定性反演 儲層構型 明化鎮(zhèn)組下段Ⅱ油組小層　出處：《石油地球物理勘探》2017年03期 　論文類型：期刊論文

【摘要】：由于曲流河儲層構型橫向巖性變化快、儲層空間變化復雜、單砂體厚度小,而海上油田井距大、井網稀疏,因此采用陸上密井網條件下的多井預測方法很難準確表征曲流河儲層構型;地震解釋方法受常規(guī)地震資料及常規(guī)反演資料縱向分辨率的限制,只能識別厚度為10~20m的大套厚層砂體,無法識別薄互層小砂體,也不能滿足曲流河儲層構型分析的精度要求。為此,在曲流河砂體沉積模式的指導下,以不確定性高精度反演數(shù)據為基礎,結合測井數(shù)據分析,采用"垂向分期、橫向定邊、三維定型"的方法對渤海W油田明化鎮(zhèn)組下段Ⅱ油組3小層(N_(2m)~LⅡ-3)的R23砂層組的曲流河砂體構型進行層次分析。根據測井曲線形態(tài)差異和反演地震數(shù)據特征將R23砂層組在垂向上劃分為R23-1和R23-2兩個沉積單元,在R23-1和R23-2兩期復合河道中識別出6條近SN向展布的單一河道,且在單一河道內識別出多個規(guī)模不等的復合點壩,在海上油田稀疏井網條件下精細識別了不同級次曲流河砂體構型邊界,有效提高了復合河道、單河道及點壩體的識別精度。
[Abstract]:Because of the rapid change of lateral lithology of meandering river reservoir, the complex spatial change of reservoir, the small thickness of single sand body, the large well spacing and sparse well pattern in offshore oil field. Therefore, it is difficult to accurately characterize the conformation of meandering river reservoir by using multi-well prediction method under the condition of overland dense well pattern. The seismic interpretation method is limited by the vertical resolution of conventional seismic data and conventional inversion data, so it can only identify large thick sand bodies with thickness of 10 ~ 20m, and can not identify thin interbedded and small sand bodies. Therefore, under the guidance of the sedimentary model of meandering river sand body, based on the uncertainty and high precision inversion data, combined with log data analysis. Adopt "vertical staging, lateral fixing edge." Three-Dimensional stereotyping method for formation 3 of Lower member 鈪，

本文編號：1466749