塔中围斜地区碎屑岩储层地震非线性综合预测

针对塔中围斜区总体勘探程度较低、大埋深碎屑岩储层构造欠发育和储层内部的非均质特性,尝试将储层地震非线性综合预测技术首次应用于塔中围斜区碎屑岩储层预测,储层综合预测表明,卡1区东河砂岩和志留系下砂岩段储层的有效性指数值在0.7以上的层段为有利储层段,取得了新的进展和较好的应用效果,对该区的勘探开发具有一定的参考意义,为塔中围斜区储层预测和油气检测探索出一条新的技术途径。

THE SEISMIC NONLINEAR INTEGRATED PREDICTION ON THE CLASTIC RESERVOIR IN THE PER-ICLINAL AREA AROUND CENTRAL TARIM

Based on genetic algorithms(GA) with fuzzy nerve network(ANFIS),the reservoir seismic nonlinear integrated prediction technology is composed of the seismic high resolution nonlinear inversion,the reservoir seismic nonlinear characteristic analysis,the reservoir nonlinear combined prediction and the validity evaluation and so on.This kind of geophysical technical series entirely attribute to the nonlinear system domain,characterized by high resolution and global optimization,distinguished from the conventional reservoir prediction technology,and pushes the seismic reservoir prediction and evaluation to semi-quantitative or quantitative development phase.Since the degree of exploration is low,the structure of the deep buried clastic reservoir is poorly developed and the internal reservoir is heterogeneous,attempt is made to apply the reservoir seismic nonlinear integrated prediction technology to clastic reservoirs in the peri-clinal area around Central Tarim and new progress and better application effect are achieved.Synthetic prediction of reservior indicates that the Donghe sandstone and the lower member of sandstone of Silurian are favourable reservior segments with validity value over 0.7.This method is of reference significance and provides a new approach and technique for the prediction and exploration of oil and gas in the area.