一个砂泥岩薄互层地区的储层预测方法及效果

A method and its effects for thin-interbedded reservoir prediction

吉林油田地质调查处, 松原 131200

Research Institute, Division of Gcological Survey, Jilin Oilficld, Songyuan 131200

如何进行低渗透薄互层的储层预测, 目前还是个难题。本文摸索出了一套在低渗透薄互层地区可行的储层标定方法, 建立了砂岩集中段与高分辨率地震相位的对应关系。在波阻抗反演剖面上将F油层划分成四个砂岩集中段。利用GEOQUEST工作站, 分段进行了砂体和物性预测。还利用模式识别技术及已知井资料建立含油模式, 进行含油面积预测。经上述工作, 预测含油面积×××平方千米, 地质储量××××万吨。在预测含油面积范围内钻探7口井, 均获工业油流。

It is still a tough problem how to predict the low-permeability thin-interbedded reservoir. This paper presents a practical reservior calibration method for low permeability thin-interbedded areas.The method can be used to determine the relationship of sand sections and high-resolution seismic phases. Four sand sections can be recognized for F oil-bearing formation of impedance section. This is done segment by segment on GeoQuest workstation. Oil-bearing patterns are constructed using patern recognition techniques which are supervised by drilling and logging data and further predict oil-bearing area. An area of thousands of square kilometer and a geological reserve of hundreds of million tons have been predicted.Seven wells have been drilled in the predicted area, all of which flow oil of commercial interest.