面向油藏开发地质问题的精细储层反演研究(英文)
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摘要
垦71开发区块的主要产油层系为新近系的馆陶组河流相和古近系的东营组三角洲相地层,具有被断层复杂化的多油水系统。该区井网密集,储层厚度薄,横向关系复杂,储层与非储层速度差异小,后续开发方案调整所要求的精细储层描述难度较大。本文展示了以精细储层描述为目标的地震约束反演实例,利用多井地震、地质标定,结合三维构造解释成果,建立三维多断层精细约束地质模型。在此基础上,采用随机地震反演方法,进行了波阻抗、岩性等多种地层参数反演,较好地解决了该区薄互层储层精细描述问题,证实了精细储层反演技术在油田开发中的重要作用。
In the Ken 71 development block, fluvial facies of the Neogene Guantao Formation and delta facies of the Paleogene Dongying Formation are the main pay beds. It is a multiple oil and water system which is complicated by faults. Characteristics of the block include a dense well network, thin reservoirs, complicated horizontal relationships, and small velocity difference between reservoir and non-reservoir. Therefore, it is difficult to conduct detailed reservoir description for subsequent development project adjustment. We demonstrate a stochastic seismic inversion which aims at detailed reservoir description. It is a technology which utilizes multiple wells, seismic data, and geological calibration and integrates with 3D structural interpretation results to build a 3D multi-fault detailed and constrained geological model. On this basis, we adopted stochastic seismic inversion to conduct a multi-stratum parameters inversion such as impedance and lithology. As a result, thin interbedded strata in the block were well resolved and the results demonstrated the importance of detailed reservoir inversion for oilfield development.
In the Ken 71 development block, fluvial facies of the Neogene Guantao Formation and delta facies of the Paleogene Dongying Formation are the main pay beds. It is a multiple oil and water system which is complicated by faults. Characteristics of the block include a dense well network, thin reservoirs, complicated horizontal relationships, and small velocity difference between reservoir and non-reservoir. Therefore, it is difficult to conduct detailed reservoir description for subsequent development project adjustment. We demonstrate a stochastic seismic inversion which aims at detailed reservoir description. It is a technology which utilizes multiple wells, seismic data, and geological calibration and integrates with 3D structural interpretation results to build a 3D multi-fault detailed and constrained geological model. On this basis, we adopted stochastic seismic inversion to conduct a multi-stratum parameters inversion such as impedance and lithology. As a result, thin interbedded strata in the block were well resolved and the results demonstrated the importance of detailed reservoir inversion for oilfield development.
引文
Jenkins, G. F., and Brown, G. M., 2000, Stochastic inversion: 70th Ann. Intemat. Mtg., Soc. Expl. Geophys., Expanded Abstracts, 2277 - 2280.
Shanor, G., Rawanchaikul, M. ,Sams, M., Muggli, R., Tiley, G.,. and Ghulam, J., 2001, A geostatistical inversion to flow simulation workflow example: Makarem field, Oman: 63rd EAGE Conference and Technical Exhibition, Amsterdam.
Wang, Y. G.., 2002, Seismic reservoir inversion algorithm and the key problems and policies in its application: Geophysical Prospecting for Petroleum, 41 (3), 299 - 303.
Yao, F. C, and Gan, L. D., 2000, The application and limitation in seismic inversion: Petroleum Exploration and Development, 27 (2), 53 - 56.
Zhang, X. F., 2005, The application of curve-reconstructed technique in logging constraint inversion: Petroleum Exploration and Development, 32 (3), 73-73.
Zhang, Y. G., 2002, The present and future of wave impendence inversion technique: Geophysical Prospecting for Petroleum, 41 (4), 385 - 390.
Zhen W. S., Lu X. H., Hu W. S., and Yu G. N, 2001, Fine description of inhomogeneous reservoir in complicated fault block: China Petroleum Industry Press, 79 - 95.
Shanor, G., Rawanchaikul, M. ,Sams, M., Muggli, R., Tiley, G.,. and Ghulam, J., 2001, A geostatistical inversion to flow simulation workflow example: Makarem field, Oman: 63rd EAGE Conference and Technical Exhibition, Amsterdam.
Wang, Y. G.., 2002, Seismic reservoir inversion algorithm and the key problems and policies in its application: Geophysical Prospecting for Petroleum, 41 (3), 299 - 303.
Yao, F. C, and Gan, L. D., 2000, The application and limitation in seismic inversion: Petroleum Exploration and Development, 27 (2), 53 - 56.
Zhang, X. F., 2005, The application of curve-reconstructed technique in logging constraint inversion: Petroleum Exploration and Development, 32 (3), 73-73.
Zhang, Y. G., 2002, The present and future of wave impendence inversion technique: Geophysical Prospecting for Petroleum, 41 (4), 385 - 390.
Zhen W. S., Lu X. H., Hu W. S., and Yu G. N, 2001, Fine description of inhomogeneous reservoir in complicated fault block: China Petroleum Industry Press, 79 - 95.
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