基于火山喷发期次控制下的分频储层预测研究——以滴405、滴西323井区火山岩气藏为例

Research on Frequency-Divided Reservoir Prediction Based on Volcanic Eruption Period Control:A Case Study of Volcanic Gas Reservoirs in the Di405 and DiXi323 Well Area

针对滴405、滴西323井区石炭系气藏储层非均质性强、预测难度大和水平井储层钻遇率低的问题,利用地震、测井、地质和生产动态等资料,依据前人火山机构分析和火山相带展布认识,划分了3期主要火山喷发期次,各喷发期次的自南向北叠置展布。在喷发期次指导下采用分频属性反演进行储层预测,经水平井实钻验证预测效果好,吻合率高。结论认为火山喷发期次的划分为分岩体储层预测提供了依据,分频属性反演预测储层进而提高水平井储层钻遇率是可行的。

For Di405,DiXi323 well area carboniferous gas reservoir of the reservoir heterogeneity is strong,predict the difficulty and the problem of low drilling rate in reservoir of horizontal wells,using seismic,logging,geology and production data,on the basis of predecessors’volcanic mechanism analysis and volcanic facies belt distribution,divides the 3 volcanic eruption periods,the eruption periods of superimposed distribution from the south to the north.Under the guidance of the eruption period,the fractal frequency attribute inversion was used for reservoir prediction,which was verified by horizontal wells with good prediction effect and high anastomosis rate.The conclusion is that the classification of volcanic eruption period provides a basis for reservoir prediction of rock body,and it is feasible predict reservoir by frequency division property inversion and increase drilling rate in reservoir of horizontal wells.