海塔油田铜钵庙组凝灰质储集层流体性质识别

Identification of fluid property of Tongbomiao Formation tuffaceous reservoir in Haita Oilfield

海塔油田铜钵庙组油藏储集层岩性复杂,流体性质识别难度大。通过研究储集层四性关系及测井响应特征,分析凝灰质组分蚀变机理,提出电阻率归一化校正方法,建立了凝灰质储集层砂岩和砂砾岩的油水层识别图版,较常规图版精度提高了11百分点。利用校正后的油水层识别图版,有效指导了储集层有效厚度划分、油水关系确定和潜力层挖潜。文中研究成果对类似油田凝灰质砂岩、砂砾岩储集层流体性质的识别,具有一定的参考价值和借鉴意义。

It is difficult to identify reservoir fluid property because of the complicated reservoir lithology of Tongbomiao Formation oil layer in Haita Oilfield.Through studying the relationship of reservoir physical property and logging response characteristics,this paper analyzes the alteration mechanism of tuffaceous components,proposes the correction methods of resistivity normalization and establishes the oil-water layer identification chart of sandstone and glutenite reservoir.Compared with the conventional chart,the precision improves by 11％.Using the corrected oil-water layer identification chart,the reservoir effective thickness is divided effectively,the oil-water relationship is made sure and the potential layer is tapped.At the same time,the research results have a certain value and reference significance for the fluid property identification and application of tuffaceous sandstone and glutenite reservoir in similar oilfield.