石油与天然气地质 ›› 2023, Vol. 44 ›› Issue (2): 247-263.doi: 10.11743/ogg20230201
收稿日期:
2022-12-20
修回日期:
2023-01-20
出版日期:
2023-04-01
发布日期:
2023-03-17
第一作者简介:
王光付(1965—),男,博士、教授级高级工程师,油气田开发。E?mail: 基金项目:
Guangfu WANG1(), Hai XU1, Fayou LI1, Jianfang SUN1, Wenlong DUAN2
Received:
2022-12-20
Revised:
2023-01-20
Online:
2023-04-01
Published:
2023-03-17
摘要:
目前在油气勘探开发领域,针对中等埋深(2 500~3 500 m)砂岩储层预测的极限厚度一般可以达到5~10 m,而小于5 m的超薄储层准确预测仍为工业界难题。基于厄瓜多尔安第斯14和17区块不同时期采集和处理的多工区叠后地震数据,采用构造趋势面驱动叠后连片一致性处理,压制了多工区相位、能量、频率及闭合差等因素对薄层反射的干扰,降低了储层预测的多解性。基于时-频衰减高精度合成记录标定方法,消除由于地层吸收产生的时间累积误差,精确标定和解剖薄层反射特征,确定了超薄储层分辨的最低主频。基于无井驱动的“稳态变时频子波” 叠后宽频有效信号高分辨率处理技术,有效恢复了薄层弱反射系数。基于宽频地震波形约束,优化了相控非线性反演的算法与工作流程。通过上述研究,形成了一套有效的超薄砂岩储层综合预测方法和技术体系,成功地实现了埋深3 000 m、厚度2~5 m潮汐水道砂体的精准预测,新钻滚动评价井和开发井验证其预测准确率达到90 %以上。
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