鄂尔多斯盆地富县地区马五段古岩溶储层地震预测

Prediction of paleokarst reservoirs in the fifth member of the Ordovician Majiagou Formation in Fu County area,Ordos Basin using seismic attribute analysis

鄂尔多斯盆地富县地区马五段古岩溶储层具有低孔、低渗和非均质性强的特点,针对该区储层复杂的特点,利用实钻资料,通过精细的井震标定,总结碳酸盐岩储层的地震反射特征,提取对储层敏感的均方根振幅和瞬时频率属性,综合应用多参数地震属性回归方法对马五段古岩溶储层分布特征进行预测,以提高预测结果的可靠性.

Paleokarst reservoirs in the fifth member of the Ordovician Majiagou Formation of Fu County area in Ordos Basin are characterized by lower porosity,lower permeability and strong heterogeneity.Based on actual drilling data,the seismic reflection characteristics of paleokarst reservoir are obtained by means of fine seismic horizon calibration,from which and RMS amplitude and instantaneous frequency sensitive to the physical nature of and gas-bearing property reservoir are extracted.The distribution of the paleokarst reservoir in the fifth member of the Ordovician Majiagou Formation are predicted using multi-parameter seismic attribute repression,and the predicted results are proved by gas testing data,which shows that this reservoir prediciton method is reliable.