宝浪油田宝北Ⅰ+Ⅱ油组低于饱和压力开发特征

Development characters of strata series Ⅰ and Ⅱ of Baobei block in Baolang Oilfield below saturation pressure

宝浪油田宝北Ⅰ+Ⅱ油组自投入注水开发以来,整个开发过程始终贯穿油水并重的开发指导思想。但由于其低孔低渗的储层性质,注水外溢以及裂缝等因素的影响,尽管增注工作的力度不断加大,但潜力层受效差,地层压力仍呈下降趋势。饱和压力是注水开发油田地层压力水平的一个重要临界点,当地层压力低于饱和压力时,相关开发特征的研究对油藏后续开发决策至为关键。结合宝北Ⅰ+Ⅱ油组的开发现状,通过PVT实验、油藏工程分析、数值模拟技术,从静态和开发动态两方面对相关参数和相关指标分别进行了计算和分析,获得了一些重要的结论,也为同类油藏的相关研究提供了一些基本方法。

After the strata seriesⅠand Ⅱof Baobei block in Baolang Oilfield are put into development by waterflooding,the guildeline of both oil and water runs through the whole development process.Although stimulation work increase constantly,the water injection effect is still poor to potential layer and the formation pressure is going on a downward trend due to influencing factors,such as low permeability and porosity,reactive water injection,fracture,and so on.Saturation pressure is an important critical point of formation pressure level of waterflooding oilfield.When the formation pressure level is below the saturation pressure,the study of related development characters is very crucial to the subsequence development decision.the relevant parameters and indexes of static and dynamic development were calculated and analyzed according to PVT experiment,reservior engineering analysis,and numerical simulation technology.Some important conclusions were obtained.These conclusions also provide some basic methods for related research of similar reservoirs..