莺歌海盆地中深层储层孔隙度定量预测方法研究

Quantitative Prediction of Reservoir Porosity at Mid-deep Formation of Yinggehai Basin

莺歌海盆地中深层已进入开发阶段,该区储层十分复杂,亟需开展“甜点”储层预测研究。首先,通过岩石物理分析确定该区储层物性的敏感因素,在理论岩石物理指导下,通过泥质含量实现对岩石孔隙度变化的研究;其次,通过孔隙度变化模拟了该区地震振幅变化幅度,并通过地震振幅实现孔隙度定量预测。实际资料应用结果表明,莺歌海盆地X区目的层砂体发育,存在多个“甜点”区块。此文开展的莺歌海盆地储层物性影响因素研究及储层物性定量预测技术研究可为该区甜点预测提供支持,同时为莺歌海盆地中深层开发布井提供指导。

The mid-deep formations of Yinggehai basin have enter into development stage.However,it is very necessary to do research on the“sweet spots”prediction because of the complex reservoirs.Firstly,the sensitive parameters of reservoir property are analyzed by rock physics analysis.According to theoretic rock physics,the reservoir porosity change can be studied through argillaceous rock content.Secondly,the seismic amplitude variation is simulated by the porosity change,which can realize the porosity quantitative prediction.The real seismic data application shows that the sands are developed at target stratum of X-district,and there are several“sweet spots”in this district.This paper can provide an effective support for“sweet spots”prediction and can be as a guidance for development well deployment at mid-deep formation of Yinggehai basin.