基于波形指示反演的井震结合储层预测方法及应用

WELL-SEISMIC COMBINED RESERVOIR PREDICTING METHOD BASED ON THE WAVEFORM INDICATION INVERSION AND ITS APPLICATION

由于储层发育的复杂性,单纯利用井网资料预测井间砂体连续性及规模存在不确定性,同时仅仅依靠地震属性对油层进行平面预测也具有一定的局限性,进而严重影响了特高含水期剩余油分析和油田开发的综合调整效果。以大庆喇嘛甸油田B区块萨葡厚油层为例,与常规地质统计学反演方法应用效果进行对比,优选了基于波形特征指示的井震结合反演方法,开展了储层预测应用研究。结果表明,该方法具有更高的井间砂体预测精度和纵向分辨能力,为井间储层再认识提供了强有力的技术支撑,在同类探区具有更好的推广应用前景。

Due to the complexity of the reservoir development,there exist some uncertainties in the interwell sandbody connectivity and scale predictions. At the same time,only relying on the seismic attributes,there are a certain limitations in the planar prediction for the reservoir as well,therefore the remained oil analysis and the comprehensive adjustment effect of the oilfield development are seriously influenced at the stage of the extra high watercut.Taking Sapu thick reservoirs in Block B of Daqing Lamadian Oilfield as an example,comparing with the applied effects of the inverting method of the conventional geostatistics,the well-seismic combined inverting method was optimized based on the waveform feature indication,and moreover the applied researches on the reservoir prediction were conducted. The achievements show that the proposed method has advantaged in the higher interwell sandbody prediction accuracy and longitudinal resolution capacity,which has provided the powerful technical support for the interwell reservoir recognition,therefore,it has much better prospects of the generalized application in the same kind of the exploratory area.