基于J函数建模的M油藏水淹层测井评价

滨里海盆地M油藏属于稠油油藏，目的层埋深较浅，储层较为疏松。油田开发主要以热采为主，水窜容易造成油藏水淹，且新井初期含水率较高，为此开展水淹层测井评价对于制定科学合理开发调整方案，提高油田开发效率具有重要的意义。通过J函数建模求取原始含油饱和度来评价水淹层，基于M油藏取芯井的岩心资料，结合粒度分析、铸体薄片、扫描电镜、物性分析及压汞实验等方法，通过毛管压力曲线对目的层J函数进行建模，计算原始含油饱和度，对比原始含油饱和度与目前含油饱和度评价水淹层。结合生产测试结论，证明J函数方法在水淹层评价方面效果较好，这种方法对于构造油藏水淹层评价具有重要的参考意义。

Logging evaluation of water flooded layer in M reservoir based on J function modeling

M reservoir in Pre-Caspian Basin belongs to heavy oil reservoir. The target reservoir is shallow and loose. In the development, it is mainly based on thermal recovery, which is easy to cause reservoir water flooding. Therefore, it is of great significance to carry out logging evaluation of water flooded layer for formulating scientific and reasonable development adjustment plan and improving oilfield development efficiency. The goal of this study is to obtain the original oil saturation by J function modeling to evaluate the water flooded layer. Based on the core data of M reservoir core well, the method of particle size analysis, casting thin section, SEM, physical property analysis and mercury injection test, etc.the J function of the target layer is modeled by mercury injection data, the original oil saturation was calculated, and the original oil saturation was compared with the present one, and the water flooded layer was evaluated.Combined with the conclusion of production test,It is proved that the J function method is effective in evaluating the water-flooded layer. The method is of great significance to evaluate the water-flooded layer.