核磁共振测井在砂砾岩稠油油藏评价中的应用

胜利油区的宁海-王庄油田储层岩性复杂,油质稠,常规测井资料在产液性质、产层性质评价及储层参数计算等方面存在困难.核磁共振测井在该油田的有效储层划分、流体识别、孔隙结构研究等方面发挥了重要作用.但由于稠油粘度大,含氢指数低,也造成核磁共振测井的孔隙度、渗透率偏低.因此,在6口砂砾岩稠油井的核磁共振测井资料分析的基础上,提出了稠油校正方法,经稠油校正后,计算的储层参数更加准确,满足了砂砾岩稠油油藏精细评价的要求.

Evaluating Sand-gravel Heavy Oil Reservoirs by NMR Logging and It's Application

In Ninghai-Wangzhuang oilfield, it is difficult to identify fluid types, evaluate formation properties and calculate reservoir parameters by use of conventional logging data due to its complex lithology and heavy oil. NMR logging has been playing an important role in the effective reservoir division, fluid identification and pore configuration research in the oilfield. However, the values of porosity and permeability derived from NMR logging are lower than the real values because the heavy oil has lower hydrogen index and higher viscosity. So, proposed is a correction method for these data based on NMR logging data from 6 sand-gravel heavy oil wells. The estimated reservoir parameters from this method become more accurate, which meets the demand for such reservoir evaluation.