油气储层建模已经由两点统计发展为多点统计学建模，然而在地震储层反演中仍然以两点统计学反演方法为主。此外，沉积相约束地震反演仅更新弹性参数，未能同时更新沉积相。本项目拟针对沉积相约束地震资料反演科学问题，研究多点统计反演中沉积相模型迭代更新及其约束于弹性参数同时反演的方法。通过改进的Snesim多点建模方法预测沉积相；利用沉积相---弹性参数统计关系约束弹性参数抽样；结合更新比率恒定理论将每次反演的弹性参数用于后期迭代过程中沉积相模式预测，从而实现迭代过程中弹性参数和沉积相的同时更新；通过多个地震道同时计算和对比，实现多道同时反演，提高反演预测精度；完善多点统计概率存储与访问策略，提高反演运算效率；利用理论模型和实际模型，对算法的有效性、运算效率、影响因素等进行评价。研究将推动地震储层反演由两点统计向多点统计相控同时反演方向发展，丰富地震储层反演理论和方法，并为地震资料储层预测提供技术支持。

Reservoir stochastic modeling is progressed from two-point geostatistics to multi-point geostatistics. However, the seismic inversion methods are mainly using the two-point geostatistics;Furthermore, the facies-controlled seismic inversion is always updating the elastic parameters but remaining the facies unchanged during the iteration. For giving a solution to this scientific question, This project will develop a new seismic inversion method based on multi-point geostatistics to update the elastic parameters and facies simultaneously. The whole replacement of faices in local zone defined by the search template is realized by the improved multi-point geostatistics Snesim.The sampling of elastic parameters is from the statistic distribution of the different facies-elastic models , which gives the solution of facies –controlled seismic inversion. The facies model is revised by the method of permanence of updating ratio to account for the elastic parameters from the previous iterative results,which a simultaneous inversion of both facies and elastic parameters is realized.The multiple traces comparison between the synthetic and real seismic trace is executed by the data template in the multi-point geostatistical realization to get a multi-traces simultaneous inversion, which will improve the precision of the inversion. The storage and access of the multi-point probability are studied for a rapid inversion. The theoretical and real model are designed to show the validity, efficiency and influence factors of the new facies-controlled seismic inversion method. The study will promote the seismic inversion from two-point geostatistical inversion to facies-controlled multi-point geostatistical inversion and enrich the theory and methods, which will give a new choice in real reservoir inversion.