惠民凹陷火成岩构造的模型正演与观测系统优化

Forward modeling and geometry optimization of the igneous rocks structure within Huimin depression

胜利探区勘探开发已进入中后期,勘探目标开始转向岩性隐蔽油气藏以及微幅构造等复杂地质目标,传统的基于射线理论的地震观测系统设计技术遇到挑战.因此,波动方程、高斯射线束等数值模拟与照明分析技术应运而生,但是如何应用新型正演模拟技术指导观测系统的优化设计并没有形成一套可应用的成熟的技术思路.本文以惠民凹陷火成岩地质构造为例,希望通过精细速度建模技术和基于模型正演的采集方案优化技术的研究,形成一套适合于胜利探区火成岩地质特点的观测系统优化设计的技术系列.最后通过对实际数据进行处理,来进一步验证该技术系列能够保证火成岩地质构造形态解释的完整,火成岩下方成像质量也有较大幅度的提高.

The exploration and development of Sheng Li oil field has entered in later period, exploration target turns to subtle lithologic reservoir, micro-structure and other complex geological target. The seismic geometry design technology based on the traditional ray theory has met challenge. Numerical simulation and analysis of lighting technology such as wave equation or gauss beam of rays emerge as the times require, but how to use the new modeling for geometry design did not form a mature technology of application. In the paper, we take Huimin Depression geological structure as an example, we hope that through the sophisticated velocity modeling technology and acquisition optimization technology which based on forward modeling, form a set of suitable observation system design optimization technology series for Sheng Li exploration area with igneous rock geological characteristics. Finally, the technology series further validate that it can ensure the igneous geological structure integrity through the actual data processing and the imaging quality of igneous rock beneath is improved greatly.