苏10区块低渗透气藏动态储量预测研究

Dynamic reserves predition of low permeability gas reservoir in Block Su10

李 爽 2 贾旭峰 3 井元帅

中国石油大学地球资源与信息学院，山东 东营 257061 长城钻探工程有限公司地质研究院，辽宁 盘锦 124010 辽河油田公司曙光工程技术处，辽宁 盘锦 124109

College of Geo-Resources and Information, China University of Petroleum, Dongying 257061, China Geological Research Institute, Great Wall Drilling Company, CNPC, Panjin 124010, China Shuguang Engineering Department, Liaohe Oilfield Company, CNPC, Panjin 124010, China

气藏开发初期气藏工程的重要工作之一是确定气井的动态储量，特别是非均质性较强的低渗透气藏，单井动态储量预测更是一项复杂、困难的工作。根据苏10区块低渗透气藏生产动态及渗流特征，系统研究了压降法、产量递减法和流动物质平衡法3种动态储量计算方法，分析了3种方法的适用条件及应用效果。计算实例表明，3种方法的计算结果都比较接近，但是应用压降法计算气井动态储量需要地层压力测试资料或关井后井口压力恢复资料，要求测试时地层压力恢复程度较高，对于低渗透储层需要花费较长时间和较高费用；产量递减法更适用于持续递减期动态储量计算；流动物质平衡法较其他2种方法操作简单、资料录取容易，更具有适用性。

The determination of gas well dynamic reserves is one of the important gas reservoir engineering works in the early development stage of gas reservoir. It is more important to the design, implementation and evaluation of the development plan. It is more complex and difficult in gas reservoir with low permeability and strong aeolotropism. According to the production performance and the feature of infiltrating fluid in low permeability gas reservoir in Block Su10, system study is conducted for three means of dynamic reserves calculation. These methods are pressure drawdown method, production decline method and flow material balance method. This research analyzed the appliance conditions and application effects of the three methods. According to the calculation example, the results are more approximate by these three methods. But the data of pressure test and pressure build-up are needed in pressure drawdown method. When reservoir pressure was tested, the higher degree of pressure build-up is required, and more expense and time are needed in the test of reservoir with low permeability. Production decline method is applicable in continue decline period. Against other two methods, flow material balance method has advantages, such as easy operation, easily data collecting and good applicability.