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Capture the variation of the pore pressure with different geological age from seismic inversion study in the Jaisalmer sub-basin, India
Petroleum Science ( IF 6.0 ) Pub Date : 2020-10-20 , DOI: 10.1007/s12182-020-00517-y
Raman Chahal , Saurabh Datta Gupta

Geoscientific evidence shows that various parameters such as compaction, buoyancy effect, hydrocarbon maturation, gas effect and tectonic activities control the pore pressure of sub-surface geology. Spatially controlled geoscientific data in the tectonically active areas is significantly useful for robust estimation of pre-drill pore pressure. The reservoir which is tectonically complex and pore pressure is changing frequently that circumference motivated us to conduct this study. The changes in pore pressure have been captured from the fine-scale to the broad scale in the Jaisalmer sub-basin. Pore pressure variation has been distinctly observed in pre- and post-Jurassic age based on the current study. Post-stack seismic inversion study was conducted to capturing the variation of pore pressure. Analysis of low-frequency spectrum and integrated interval velocity model provided a detailed feature of pore pressure in each compartment of the study area. Pore pressure estimated from well log data was correlated with seismic inversion based result. Based on the current study one well has been proposed where pore pressure was estimated and two distinguished trends are identified in the study zone. The approaches of the current study were analysed thoroughly and it will be highly useful in complex reservoir condition where pore pressure varies frequently.



中文翻译:

通过印度斋沙默尔次流域的地震反演研究,捕获不同地质年龄的孔隙压力变化

地球科学证据表明,压实,浮力效应,烃类成熟度,天然气效应和构造活动等各种参数控制着地下地质的孔隙压力。构造活动区域中的空间控制地球科学数据对于可靠地估算钻前孔隙压力非常有用。构造动力复杂且孔隙压力不断变化的储层是圆周激发我们进行这项研究的动力。在杰伊瑟尔梅尔(Jaisalmer)盆地中,孔隙压力的变化已从精细尺度向广义尺度捕获。根据目前的研究,在侏罗纪之前和之后的年龄中已经明显观察到了孔隙压力的变化。进行了叠后地震反演研究以捕获孔隙压力的变化。低频频谱分析和综合间隔速度模型提供了研究区域每个隔室中孔隙压力的详细特征。根据测井数据估算的孔隙压力与基于地震反演的结果相关。根据当前的研究,已经提出了一个估计孔隙压力的井,并在研究区确定了两个明显的趋势。对当前研究的方法进行了详尽的分析,这在孔隙压力频繁变化的复杂储层条件下将非常有用。根据当前的研究,已经提出了一个估计孔隙压力的井,并在研究区确定了两个明显的趋势。对当前研究的方法进行了详尽的分析,这在孔隙压力频繁变化的复杂储层条件下将非常有用。根据当前的研究,已经提出了一个估计孔隙压力的井,并在研究区确定了两个明显的趋势。对当前研究的方法进行了详尽的分析,这在孔隙压力频繁变化的复杂储层条件下将非常有用。

更新日期:2020-10-20
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