中原油田卫城81断块沙四段确定性储层建模

THE DEFINITE RESERVOIR CHARACTERIZATION OF THE FOURTH MEMBER OF SHAHEJIE FORMATION OF FAULT BLOCK 81 OF ZHONGYUAN OIL FIELD

中原油田卫城81断块油藏发现于1980年,生产多年后产量下降。采用确定性建模方法进行储层研究包括四个主要环节:①数据准备;②建立井模型和地层格架模型;③三维空间赋值;④图形显示。以卫城81断块沙四段第二准层序组第五准层序(S425)为例对中原油田卫城81断块沙四段进行了确定性储层建模。首先进行地层划分与对比,然后对测井曲线进行数字化和二次解释,接下来将解释结果网格化,最后建立储层地质模型,为下一步开发方案的调整奠定基础。

Fault block 81 reservoir of Zhongyuan oil field was found in 1980. After many years of development, the production declined due to the declining of the stratum energy. The definite modeling approach is adopted to establish the reservoir geologic model. There are four steps to carry out the definite modeling: to prepare the data, to establish the single well model and stratigraphic framework model, to carry out spatial value assignment and to display the geologic map. The definite reservoir characterization of the fifth parasequence of the second parasequence sets of the fourth member of Shahejie formation of Fault block 81(S425) of Zhongyuan oilfield is carried out. First divide and correlate the strata. Then digitalize and reexplain the well logs. Next assign the explanation value of well logs spatially. And the step is to last establish the reservoir model. The research above lays a foundation for the next project setting of oil production.