鄂尔多斯盆地奥陶系侵蚀沟谷及顶面形态识别
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摘要
目的鄂尔多斯盆地下古生界奥陶系风化壳侵蚀沟谷及顶面起伏形态识别。方法综合分析储层地质及地震波形特征,有效识别奥陶系风化壳侵蚀沟谷,利用基于沉积模型的地震反演处理和精细解释方法,高精度识别奥陶系风化壳顶面起伏形态。结果ZB区奥陶系风化壳侵蚀沟谷及顶面起伏形态的识别解释结果与地质综合研究成果基本吻合;开发井的预测结果与实际钻井结果符合程度高,并取得了良好的应用效果。结论奥陶系风化壳侵蚀沟谷和顶面起伏形态的有效识别为马五1+2(O1m51+2)地层厚度、储层物性及含气性预测提供了可靠保证,为气田开发部署和井位优选提供了决策依据。
Aim To reeognize eroded channel-vale and top fluctuant configuration for weathering crust in Ordovician,Lower Paleozoic,Ordos Basin.Methods According to the geological and seismic reflection characteristics of O_1m5_(1+2) carbonate reservoir,effectively recognize eroded channels and vales,and identify the top fluctuant configuration of the reservoir by high accuracy seismic inversion processing based on sedimentary model and elaborate interpretation.Results The identified results of eroded channel-vale and reservoir top fluctuant configuration were consistent with the integrated geological research results in ZB block,and the forecasting results of exploitation wells were accorded with the actual drilling results very well and acquired better effect.Conclusion The efficient identification of eroded channel-vale of weathering crust in Ordovician and top fluctuant configuration of the reservoir created a firm foundation for prediction of O_1m5_(1+2) reservoir thickness,physical and gas-bearing properties,and provided decision-making proofs for development and well position optimization.
Aim To reeognize eroded channel-vale and top fluctuant configuration for weathering crust in Ordovician,Lower Paleozoic,Ordos Basin.Methods According to the geological and seismic reflection characteristics of O_1m5_(1+2) carbonate reservoir,effectively recognize eroded channels and vales,and identify the top fluctuant configuration of the reservoir by high accuracy seismic inversion processing based on sedimentary model and elaborate interpretation.Results The identified results of eroded channel-vale and reservoir top fluctuant configuration were consistent with the integrated geological research results in ZB block,and the forecasting results of exploitation wells were accorded with the actual drilling results very well and acquired better effect.Conclusion The efficient identification of eroded channel-vale of weathering crust in Ordovician and top fluctuant configuration of the reservoir created a firm foundation for prediction of O_1m5_(1+2) reservoir thickness,physical and gas-bearing properties,and provided decision-making proofs for development and well position optimization.
引文
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[3]佩顿C E.地震地层学[M].牛毓荃,徐怀大,陈俊生,等,译.北京:石油工业出版社,1980:45-141.
[4]王者顺,王尚旭,唐文榜.塔河碳酸盐岩溶洞油藏的地震响应及频率差异分析[J].石油与天然气地质,2004,1(25):93-96.
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[6]王士敏,鲁新便.塔河油田碳酸盐岩储层预测技术[J].石油物探,2004,43(2):153-158.
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