苏里格气田储层含水特征与测井识别方法

Characteristic of Water Bearing Formation and Well Logging Identification Method of Gas Reservoir in Sulige Gas Field

鄂尔多斯盆地苏里格气田盒8、山1气藏为弹性驱动的河流相低效气藏,储层非均质性强,压裂试气部分井出水。根据测井响应特征及非均质性将气层含水情况分为束缚水、层间水、滞留水3类,分析了3类含水气层特征,并在天然气测井响应机理研究的基础上提出了侵入分析与感应侧向联合解释法、分区图版法及气测综合判识法等气水层判识技术,使该地区气层测井解释符合率从70%左右提高到80%以上。

The He 8（Member 8 of the Upper Permian Shihezi Formation） and Shan1 gas reservoir in the Sulige field of Ordos basin is an inefficient fluvial facies gas reservoir drived by elasticity.The reservoir has strong heterogeneity and produces water widely during fracture testing.From the tested and explored data,the authors divide the water bearing gas zone into three types： irreducible water,interlayer water and retained water,and analysis the characters of them.According to the well logging response mechanism of gas,the recognition methods for gas-water layers,such as cross plot method,gas logging comprehensive distinguishing method,induction and laterolog joint interpretation method,are proposed.Based on these procedures,the logging interpretation coincidence rate of low resistivity oil reservoir was raised from 70% to 80%.