电阻率反演技术在盐水水淹层评价中的应用

发布时间：2018-06-17 00:58

本文选题：中国南海 + 涠洲油田　；参考：《新疆石油地质》2017年03期

【摘要】：油层发生盐水水淹后,水淹层电阻率明显下降,如何准确判断水淹级别成为评价水淹层的关键。利用变倍数物质平衡理论模型反演可得到饱含油和饱含水状态下地层电阻率,研究区水淹层的电阻率测井值介于饱含油地层电阻率和饱含水地层电阻率之间,且水淹程度越低,地层电阻率越接近饱含油地层电阻率;反之,则越接近饱含水地层电阻率。利用相对于饱含油地层电阻率和相对于饱含水地层电阻率的变化率建立了水淹层精细解释图版和水淹级别定量划分标准,实际应用表明,涠洲油田盐水水淹层的解释精度达到88.8%,电阻率反演技术为盐水水淹层测井评价奠定了基础。
[Abstract]:After salt water flooding occurs in the reservoir, the resistivity of the water-flooded layer decreases obviously. How to accurately judge the water-flooded level is the key to evaluate the water-flooded layer. Using the variable multiple material balance theory model inversion, the formation resistivity can be obtained under the condition of rich oil and full water. The resistivity logging value of the water-flooded layer in the study area is between the resistivity of the oil-rich formation and the water-bearing formation, and the lower the water-flooded degree, the lower the resistivity of the water-flooded formation. The resistivity of formation is closer to that of oil-bearing formation, and the resistivity of water-rich formation is closer to that of water-bearing formation. Based on the variation rate of resistivity relative to oil-bearing formation and water-bearing formation, the fine interpretation chart of water-flooded layer and the quantitative classification standard of water-flooded level are established. The practical application shows that, The interpretation accuracy of salt water flooded zone in Weizhou Oilfield is 88.8.The resistivity inversion technology has laid a foundation for well logging evaluation of salt water flooded zone.
【作者单位】：中国石油大学地球科学与技术学院;中海石油(中国)有限公司湛江分公司;
【基金】：中海石油科技攻关项目(YXKY-2014-ZJ-01)
【分类号】：P631.811;TE34

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