一种适用于不同油质类型的储层流体识别新方法

A new method for reservoir fluid type identification for different oil types

气测和地化录井技术在储层流体快速解释评价中应用广泛,但是常规的解释方法又常受到油质的影响,造成解释方法普适性不强,以及对储层流体类型解释产生偏差。为了消除不同油质对储层流体类型识别的影响,提高储层流体性质识别的准确性,通过把反映地层油气信息的气测及地化录井关键参数进行关联与耦合,首先建立了相同油质条件下的储层流体解释图版,然后通过油质特征参数的校正最终建立了适用于不同油质的普适性储层流体类型解释图版。研究结果表明,应用该方法能够消除不同油质类型对储层流体类型识别的影响,经过在黄河口凹陷中部走滑带多口探井中的应用验证,油气水层解释符合率对比测井解释结论能够达84.37%,应用效果良好。

Gas logging and geochemical logging are widely used in rapid reservoir fluid interpretation and evaluation.However,conventional reservoir fluid evaluation is often influenced by oil,which results in poor general applicability and may lead to deviation of reservoir fluid interpretation.To eliminate the influence of different oil on reservoir fluid type identification and improve the accuracy of reservoir fluid property identification,the key parameters of gas logging and geochemical logging reflecting formation oil and gas information are correlated and coupled through principal component analysis.The reservoir fluid interpretation plate under the same oil is established.Then,through the correction of oil quality characteristic parameters,the general reservoir fluid type interpretation plate applicable to different oils is finally established.The results show that the established method can eliminate the influence of different oil types on reservoir fluid type identification with wide application range and high accuracy.The application in several exploration wells in the strike-slip zone in the middle of the Huanghekou sag,the interpretation coincidence rate of oil and gas water layer compared with well logging interpretation can reach 84.37%,presenting with great application performance.