关键词: 隔夹层, 稀井网, 水平井, 相控地震协同模拟, 空间展布, 数字岩芯, 渗流特征, 疏松砂岩, 敏感性, 涩北气田

Abstract:

The I Oil Group in Member 2 of Zhujiang Formation in A Oilfield is the main reservoir. It’s production status shows
that the type，sealing ability and spatial distribution of the interlayer severely affect the reservoir development effect. Through
analyzing the core observation，thin section identification and physical analysis，we consider there widely exist calcareous，
argillaceous and physical inter-layers. The calcareous interlayer most seriously affects the development. Because of the few
well numbers，sparse well network density and limited coring，we cannot study the spatial distribution of interlayer of the
whole district only by distinguishing intercalations from the core and logging. On the basis of finely dividing and correlating
layers，sedimentary microfacies，the research makes full use of horizontal section information，combines well and seismic，
unites geophysical information and successfully predicts the three-dimensional spatial distribution of interlayer by analyzing the
model，which is established due to the innovative application of seismic cooperative sequential Gauss simulation on sedimentary
facies tract conditions. The predicted results are agreed with the dynamic production，it provides a strong basis for oilfield
production and measures for tapping potential of remaining oil.

Key words: interlayer, sparse well network, horizontal well, phase-controlled seismic cooperative sequential gauss simulation,
spatial distribution, digital core, seepage characteristics, unconsolidated sandstone, sensitivity, Sebei Gas Field