鄂尔多斯盆地靖西中部地区天然气富集差异及有利勘探方向预测

发布时间：2018-06-19 14:09

本文选题：源储接触关系 + 供烃能力　；参考：《天然气地球科学》2017年01期

【摘要】：随着鄂尔多斯盆地靖边气田扩边勘探的深入,在靖西地区奥陶系中组合白云岩储层中已发现多个含气区,但各含气区天然气的富集程度差异明显,尤其以靖西中部最为明显,有关这种富集差异的原因尚未开展深入研究。为此,借助钻井岩心、测井及储层物性等地质资料,从天然气充注能力、输导通道连通性、储层发育特征等方面对比分析了靖西中部地区苏127、苏203及桃15等3个区块天然气成藏特征的差异,从而探讨了靖西中部地区天然气富集差异原因,并对有利勘探方向进行了预测。结果表明,靖西中部地区苏127区块—苏203区块—桃15区块天然气富集的差异主要由下列因素造成:供烃窗口处的天然气充注能力决定了天然气富集程度;中组合储层输导通道的连通性影响了天然气聚集成藏的位置;储层的物性控制了天然气聚集成藏的规模。综合分析认为,苏127区块北部—苏203区块—桃15区块南部的马五5亚段—马五6亚段为有利勘探区;马五7亚段—马五10亚段勘探潜力相对较差。
[Abstract]:With the further exploration of Jingbian gas field in Ordos Basin, many gas-bearing areas have been found in the dolomite reservoir of Ordovician assemblage in Jingxi area, but the gas enrichment degree of each gas-bearing area is obviously different, especially in the central part of Jingxi. The reasons for this enrichment difference have not been further studied. Therefore, with the help of geological data such as drilling core, logging and reservoir physical properties, from natural gas filling capacity, transportation channel connectivity, The differences of natural gas accumulation characteristics in Su127, Su203 and Tao15 blocks in the central part of Jingxi are analyzed in terms of reservoir development characteristics, and the reasons for the difference in natural gas enrichment in the central area of Jingxi are discussed. The favorable exploration direction is forecasted. The results show that the difference of natural gas enrichment between Su127 block and Su203 block and peach 15 block in central Jingxi area is mainly caused by the following factors: the natural gas filling capacity at the hydrocarbon supply window determines the degree of natural gas enrichment; The connectivity of the transport channel of the middle assemblage reservoir affects the location of the accumulation of natural gas and the physical properties of the reservoir control the scale of the accumulation of natural gas. The comprehensive analysis shows that the northern part of Su127 block, Su203 block and the southern part of Tao 15 block are favorable exploration areas, and the exploration potential of Ma W7 submember and Ma Wu 10 submember is relatively poor.
【作者单位】：中国科学院边缘海与大洋地质重点实验室南海海洋研究所;中国石油大学(华东)地球科学与技术学院;中国石油长庆油田公司勘探开发研究院;
【基金】：国家自然科学基金项目(编号:41476039;41276048;91328205) 中央高校基本科研业务费专项(编号:14CX02116A)联合资助
【分类号】：P618.13

【相似文献】