喇嘛甸油田萨尔图油层剩余油分布特征

CHAYACTERISTICS OF RBSIDUAI OIL DISTRIBUTIONIN SAERTU RESERVOIR, LAMADIAN OILFIELD

从喇嘛甸油田南块井网加密前后萨尔图油层的变化看出,低弯曲分流河道砂体的窄条带形状分布随着井网的加密变得更为明显,而且对差油层更需要分解成单砂体来认识。通过分层测试、水淹层解释等资料对喇嘛甸油田萨尔图油层剩余油分布状况作了分析,按其影响因素分为注采不完善、油层的变差部位或变差部位遮挡、油水升间油层连通异常、新钻遇的未水淹层四种类型。同时提出了对剩余油挖潜的设想。

ABSTRACT The changes of Saertu reservoir before and after wells infilling in south Lamadian oilfield show that the distribution of narrow belt-like shape in low meandering distributary channel sandstone bodies becomes more apparent along with the infilling wells. More over low and medium permeability pay zones need to be divided more into single sand bodies to be studied. Based on separated layer testing data and watered out interpretation data, the distribution of residual oil of Saertu reservoir in lamadian oilfield is analyzed. Based on its influence, they arc divided into four type areas, e.g., unbalanced injection and production areas, low and medium permeability layers or barriered by shales areas, poor communicated areas between injectors and producers and unwaiered -out areas which newly encountered ones, four types areas, were divided. Finally, tentative ideas to ttap the residual oil are mentioned in this paper.