砂岩油气藏地震精细描述在油田开发中的应用

Sand reservoir seismic characterization and its application to oilfield development

年静波 刘喜武 孟凡顺

Nian Jingbo Liu Xiwu Meng Fanshun

中国海洋大学 海洋地球科学学院, 山东 青岛 266003

Marine Geosciences school, Ocean University of China, Qingdao 266003, China

针对砂岩油藏描述中如何将地震、测井和地质信息进行有效-体化综合的问题,提出砂岩油气藏地震精细描述的策略与技术路线,认为基于地质模型测井曲线约束的地震波阻抗反演是确保地震、测井和地质信息可靠一体化综合的首要技术。将油藏地震精细描述技术应用在某海上油田开发区块。应用的技术系列包括:斜井合成地震记录的制作;子波反演与层位标定迭代技术层位标定;储层特征测井曲线重构;测井约束稀疏脉冲波阻抗反演;随机模拟;信息融合等。对该区块两个油层组的油气藏构造、储层(岩性、物性)的空间分布及油气分布规律进行了精细研究和描述,为该区块井位部署调整提供地质依据。研究表明,以测井曲线重构、波阻抗反演和随机模拟为核心的地震油藏描述技术,可以较好地解决储层参数定量估算和含油气预测问题。

Some strategy and techniques are presented on seismic sandstone oil reservoir characterization in order to find a way to implement the true integration of seismic data, well logs and geology. It's believed that well logs constrained seismic impedance inversion based on geological model is the essential technique, and a series of methods are grouped and employed including inclined well synthetic seismogram, seismic events calibration by iteration with wavelet inversion, Quasi-acoustic log reconstruction, sparse pulse impedance inversion restricted by well logs, reservoir parameters prediction by stochastic simulation, and integrated working flow. In certain marine oil field area, all the techniques are applied to characterize two oil formations in detail, including structure, lithology, reservoir distribution, and oil distribution. Good geology laws have been taken, which has provided important foundations for deploying well locations. The research and results show the proposed reservoir seismic characterization methods, of which log reconstruction, impedance inversion and stochastic simulation are key techniques, and they can estimate the reservoir parameters and predict oil beds very well.

中国科学院知识创新重大项目"环渤海(湾)地区前新生代海相油气资源研究"(KZCX1-SW-18)资助