复杂沉积区内低渗-致密薄储层分级表征下的“甜点”预测

Prediction of“sweet spot”under classification characterization of low permeability and tight thin reservoir in complex sedimentary region

随着低渗-致密油气藏纳入油气开发范畴,“甜点”分布的有效预测是该类油气藏高效开发的关键。主要应用储层分级表征的地震预测技术,采取以定性的沉积环境、半定量的储层预测到定量储层预测下逐级深入的储层展布研究为指导;综合利用地震反射结构分析、波形指示预测、地质统计学反演为手段提高有效储层预测的可靠性,进而确定优势储层平面分布,并通过平面叠合进行“甜点”分级;针对“甜点”分级以分步钻探实施,滚动开发,实现对复杂沉积区内低渗-致密油气藏低风险、高效的开发。

As low-permeability and tight oil and gas reservoirs are brought into the category of oil and gas development,the effective prediction of"sweet spot"distribution is the key to the efficient development of such reservoirs.In this paper,using the seismic prediction technology of reservoir classification characterization,guided by the study of reservoir distribution step by step from qualitative sedimentary environment and semi-quantitative reservoir prediction to quantitative reservoir prediction.Comprehensively utilizing seismic reflection structure analysis,waveform indication prediction and geostatistical inversion to improve the reliability of effective reservoir prediction.And then the dominant reservoir plane distribution is determined,and the"sweet spot"classification is carried out by plane superposition.For the classification of"sweet spot",implemented by step-by-step drilling and rolling development to achieve low-risk and efficient development of low permeability and tight oil-gas reservoirs in complex sedimentary region.