H油田隔夹层测井识别方法研究

Research on recognition of barrier/interbed via logging in H Oilfield

1. 长安大学地质工程与测绘工程学院，陕西西安710061;2. 中国石油天然气勘探开发公司海外研究中心，北京100083

College of Geology Engineering and Geomatics of Chang'an University, Xi'an 710054, China

陆相储层隔夹层是流体在储层中流动的重要影响因素之一,也是储层精细表征的重要内容。认识和表征储层隔夹层特征,对中、后期油田剩余油分布的研究以及制订油田开发调整方案有重要的意义。以H油田VIVIAN层砂岩油藏为例,探讨了储层隔夹层的识别方法。首先通过岩心和测井资料分析讨论了H油田VIVIAN层的隔夹层性质和测井曲线特征,VIVIAN层的隔夹层主要为岩性和物性隔夹层;然后对这2种隔夹层的识别分别提出SHI曲线法、孔隙度-渗透率交会图法、经验统计法和含油饱和度法,并建立了隔夹层的识别标准。实际应用表明,提出的隔夹层识别方法和标准可以有效地划分H油田VIVIAN层砂岩油藏的隔夹层,识别结果与岩心和开发资料吻合较好。

Barrier/interbed of land facies reservoir is one of the important impact factors during fluid flowing in reservoir and is the important content in detailed description of reservoir. So the cognition of barrier/interbed is significant to study the remaining oil distribution and to adjust the development plan in the later period of oilfield. Taking the sandstone reservoir of VIVIAN oilfield as an example, the recognition method of barrier/interbed is researched. The barrier/interbed properties and logging curve characteristic are discussed. The core and the logging data analysis show that the lithol-ogic and physical barrier/interbed mainly exists in VIVIAN formation. Some methods are proposed during barrier/interbed recognition, such as the SHI curve method, the porosity-permeability X-plot chart method, the experimental statistical method, and the oil saturation method. In addition, the barrier/interbed recognition criteria are also proposed. The actual application shows that the newly proposed methods and criteria can effectively classify the barrier/interbed of sandstone reservoir of VIVIAN formation in H oilfield and the recognition result by these new methods is in good accordance with the core and development data.