建南地区长兴组碳酸盐岩礁滩储层波阻抗反演预测

The Prediction of Wave Impedance Inversion in Carbonate Reef Flat Reservoir of Changxing Formation in Jiannan Area

四川盆地建南地区二叠系长兴组碳酸盐岩生物礁滩是很有潜力的礁滩型油气储集层;但生物礁滩储层的预测一直是油气勘探的重难点。为了研究建南地区长兴组的优质碳酸盐岩礁滩储层,先研究了该地区的层序地层、沉积相和生物礁滩基本特征;然后采用了STRATA中基于模型反演技术,利用其井震联合反演特点对研究区储层进行波阻抗反演预测,确立出研究区礁滩储层的识别模式及储层主要发育时期。最后结合预测结果的解释划分了长兴组生物礁滩发育的有利区带。对长兴组礁滩储层后期勘探开发具有重要的指导意义。

Organic reef flat of Permian Changxing Formation in Jiannan area of Sichuan basin are reef-flat oilgas reservoir with great potential,and organic reefs and banks reservoir prediction is always the heavy difficult point of oil-gas exploration.In order to study the high-quality carbonate reef flat reservoir of Jiannan area and combined with the research of sedimentary features and basic characteristics of organic reefs and banks in this field.Model based inversion in STRATA to predict reservoirs in working area based on its character of seismic-logging combined inversion is used.Then according to the interpretation of prediction result,the zones favorable are identified to form organic reefs and banks of Changxing Formation,which has guiding significance to exploration and developing of reef-fiat reservoir of Changxing Formation.