基于录测资料的变质岩潜山优质储集层预测方法及其应用

Prediction method of high-quality buried hill reservoirs of metamorphic rocks based on mud logging and well logging data and its application

由于变质岩潜山储集层物性整体上受裂缝非均质性发育影响严重,裂缝对复杂储集层的油气成藏与高产具有重要的控制作用,为研究储集层裂缝发育与分布情况,保障变质岩潜山储集层高产及稳产,在利用录井、测井资料的基础上,提出了钻时-气测全烃法、dc指数法、电阻率测井法、三孔隙度测井法、电成像测井法。通过不同方法的相互验证,建立了一套录测一体化综合评价标准,对优质储集层发育情况进行研究,并将其应用于渤海油田渤中19-6构造古生界变质岩潜山优质储集层预测中。结果表明利用此方法预测的渤中19-6构造太古界变质岩潜山X井优质储集层发育段,通过钻井取心可见裂缝发育明显,且测试获高产工业气流,与预测的部位相吻合,将该区域优质储集层判断的符合率提高到92%以上,证明该综合评价方法预测变质岩潜山优质储集层可行且应用效果显著。

Fractures severely control the hydrocarbon accumulation and high production of complex reservoirs since the physical properties of buried hill reservoirs of metamorphic rocks are seriously affected by the development of fracture heterogeneity as a whole.To study the development and distribution of fractures in reservoirs and ensure the high and stable production of buried hill reservoirs of metamorphic rocks,the drilling time-gas logging total hydrocarbon method,dc index method,resistivity logging method,three-porosity logging method and electrical imaging logging method are proposed based on mud logging and well logging data.Through mutual verification of different methods,a set of integrated evaluation standards of mud logging and well logging are established to study the development of high-quality reservoirs and applied to the prediction of high-quality reservoirs in the Paleozoic buried hill reservoirs of metamorphic rocks of Bozhong 19-6 structure in Bohai Oilfield.The results show that the high-quality reservoir of X well in the Paleozoic buried hill of metamorphic rocks of Bozhong 19-6 structure predicted by this method has obvious fractures through drilling and coring,and the high-yield industrial gas flow obtained in the test is consistent with the predicted position.By increasing the coincidence rate of the regional high-quality reservoir determination to over 92%,this comprehensive evaluation method proves its feasibility and remarkable effect in predicting high-quality buried hill reservoirs of metamorphic rocks.