复杂碳酸盐岩储层测井特征曲线重构及应用
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摘要
地质统计学反演是储层预测的技术方法之一。在碳酸盐岩油藏中储层与致密层波阻抗差异小,储层预测难度较大,在进行储层预测时,储层特征曲线重构是提高储层预测能力和精度的有效方法。以滨里海盆地S油田碳酸盐岩储层为例,根据岩石物理研究成果,电阻率和自然伽马测井曲线能够较好地区分储层与致密层,据此重构对储层较敏感的特征曲线,并应用该特征曲线与地震资料结合,完成地质统计学反演。应用结果表明,储层预测效果较好,与测井符合程度较高,为研究区下一步井位部署提供了重要依据。
Geostatistical inversion was one of the reservoir prediction techniques.When the difference of wave impedance between oil layers and tight reservoirs was small,it was difficult for reservoir prediction,thus in the reservoir prediction,its characteristic curve was the effective way for improving the accuracy of logging constrained seismic inversion.By taking a carbonate reservoir in S Oilfield of Marina Caspian Basin for example and according to the result of petrophysical study,resistivity and natural gamma curve could be used to distinguish the oil layer and the tight reservoir,and based on the study,more sensitive characteristic curve to reservoir was reconstructed,and in combination of the characteristic curve with seismic data,geological statistic inversion was implemented.The result shows that the effect of reservoir predication is better,and it highly agrees with the well logging.It provides an important basis for next well location deployment.
引文
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