摘要
研究地层异常压力对于认识油气动力机制、寻找工业气藏和安全开采起着至关重要的作用。文章通过对柴达木盆地东部地区的第四系七个泉组地层异常压力形成机制的分析,利用声波时差等测井资料和实测压力资料,根据"泥质沉积物不平衡压实造成地层欠压实并产生异常压力"原理和有效应力原理,并结合高产气井和干井的测井资料的研究,建立了该地区的压力预测模型,对地层孔隙压力进行预测,并对预测结果进行了验证。研究结果表明:该地区地层异常压力与油气藏存在着密切的关系,即大部分的高产气井具有明显的欠压实引起的异常地层压力。从而将该地区的地层异常压力与气藏检测联系起来。
Studies of geopressure play an important role on studying hydrocarbon dynamics mechanism,finding commercial reservoirs and secure production.Based on the principle that disequilibrium compaction of argillaceous sedimentation yields uncompaction and geopressure and the effective stress principle,combining with the study on the high gas rate wells and the dry wells,we get the pressure prediction model of the Qigequan formation of Quaternay in the East Qaidam Basin by analyzing the geopressure mechanism using the slowness data from the well logging and the real pressure data.We predict the formation pressure using this model and compared it with the measured data.The results indicated that it is compatible to predict gas by geopressure.In this area,there are apparent geopressure caused by uncompaction in most of the high gas rate wells.So we can further correlate the geopressure with the gas reservoir detection.
出处
《石油仪器》
2012年第5期56-58,65,共4页
Petroleum Instruments
关键词
柴达木盆地
压力预测
声波时差
欠压实
气藏
Qaidam Basin
geopressure
interval transit time
undercompaction
gas reservoir
