苏里格气田盒8段低渗砂岩储层的预测

The reservoir prediction of low permeability sandstone in Sulige gas field

（1.西北大学地质学系，陕西西安 710069； 2.中国石油长庆油田公司，陕西西安 710021）

Geology Department of Northwest University，Xi′an 710069,China

针对苏里格气田盒8低渗砂岩气藏开发所面临的储层非均质性强、常规预测方法效果差的问题，提出了河道识别与含气性预测相结合的储层预测思路。首先利用平均波峰振幅分析和地震子波吸收系数分析进行叠置河道识别，然后利用AVO分析和多参数交会反演进行储层岩性和含气性预测，最后利用河道识别结果和含气性预测结果进行储层综合评价。将该方法应用于盒8层段的储层预测，不仅降低了预测结果的多解性，而且对含气有利区的划分较之常规方法分类更细，平面分布更符合当前的地质认识。根据预测和评价结果部署的3口开发评价井，经钻探气层厚度都在8 m以上。

Aimed at the problems of stronger heterogeneity and unsatisfactory effect in He8 sandstone reservoir from the conventional forecasting methods, a new thought was presented that integrated channel identification with gas-bearing prediction. A set of methods were established that identified fold channels from the analysis of average wave peak amplitude and seismic wavelet absorption coefficient, predicted gas-bearing sand from the AVO analysis and multi-parameter cross inversion, and appraised the reservoir by the integrated results of them. That can be used to decrease the uncertainties from the forecasting results. Those methods were applied in appraising the gas reservoir during the development prophase, and the satisfactory results were achieved.