基于油井产能的油层分类及应用  

Stratigraphic Classification and Its Application Based on Well Producibility

作　　者：覃建华[1,2] 伊军峰[2] 董海海[2] 吴绍强[3] 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [3]中石油西部钻探工程有限公司新疆试油公司,新疆克拉玛依834000

出　　处：《石油天然气学报》2013年第5期98-103,2,共6页Journal of Oil and Gas Technology

摘　　要：不同于以孔、渗或孔隙结构特征等为参数的储层静态分类,介绍了一种依据油井产能进行油层分类的方法。首先要分析影响油层产能的敏感地质因素,根据在准噶尔盆地、塔里木盆地等十多个油藏的经验:同一油藏内,有效厚度、含油饱和度或孔渗是控制产能的主要因素,即使对典型的裂缝性油藏而言,仍可发现有效厚度对产能的贡献。组合筛选出的敏感地质参数采用试凑法建立油层分类模型,对不同油藏而言建模参数可以有差异,这个过程是建立在油井产液剖面资料或生产资料基础上的。统计表明,基于产能分类的油层具有明确的地质意义,同一油藏内部沉积或构造差异是油层分类的地质基础。一类油层有更高的采液能力,通常也有更高的采油速度,在相同开发阶段采出程度更高。一类油层的最佳调整时机是在开发中前期,中后期往往因为采出程度高,含水高而具有较高风险;二类油层在开发各阶段都是调整及加密的主要对象,尤其是中高含水阶段;很多已开发的三类油层不具备经济开发的能力,水平井开发是一个方向。It was different from static reservoir classification by using porosity or permeability of pore structure as parameters,a classification method was introduced based on well productivity.First the sensitive geologic factors influencing the productivity were analyzed.The experiences from more than 10 oilfields in Junggar Basin and Tarim Basin indicated that the effective thickness,oil saturation,porosity and permeability were the main factors to control productivity in the same reservoir.Even if it was in the typical fractured reservoir,it could still be found the contribution of effective reservoir thickness to the productivity.The selected combination of geologic parameters were used to establish a reservoir classification model with cut and trial method,the modeling parameters could be varied for different reservoirs.The process was based on the data of well sections and production.Statistics show that the classification based on reservoir productivity has clear geological significance and deposition or structural difference in the same reservoir is the geological base of reservoir classification.Class A reservoir has higher fluid producing capacity,usually it also has a higher rate of oil production and a higher recovery percent at the same stage of development.The optimal adjustment time of Class A reservoir is at the late development stage,because it has high risk of the high water cut at high recovery degree stage;Class B reservoirs are the main objects of adjustment and infilling at each stage of development,especially at high watercut stage;many developed Class C reservoirs have no economic development ability,but horizontal well is an effective way of oil development.

关 键 词：油层分类 油井产能 有效厚度 含油饱和度 注水开发 开发调整 

分 类 号：P618.13[天文地球—矿床学]