摘要
针对松辽长岭断陷松南气田火成岩气藏储层相变大、孔隙结构复杂、气体组份中二氧化碳含量高易形成水合物、完井方式多样等特点,在试气过程中需对水合物形成进行预测和防治。高压高产气井采用回压法和修正等时试井方法能满足产能试井技术要求,二种方法计算的无阻流量基本相同。依据气井储层相态和构造特征,选取了合理解释模型,拟合曲线的吻合程度高,试井资料解释结果可靠,求取的储层参数准确,并依据试井资料确定了气田合理产量,为松南气田产能建设提供了可靠依据。
For the characteristics of large reservoir phase-change, complex pore structure, high components of carbon dioxide easy to form hydrates, various well completion ways and so on of Songnan volcanic rock gas reservoir of Changling fault depression in Songliao basin, it is necessary to predict, prevent and treat the formation of hydrates in gas testing operation. Back-pressure testing and modified isochronal testing were adopted for high-pressure and high-output gas wells and met well with the technical require- ments of well testing of deliverability, and the calculation results by using the two methods led to the same open-flow capacity. This paper selected the reasonable explanation model based on reservoir phase and structural characteristics of gas wells, and the fitted curve had a high degree of coincidence. Thanks to the reliable well testing data, reservoir parameters could be accurately calculated and reasonable production of gasfield could be determined according to well testing data, thus accountable references could be provided for the productivity construction of Songnan gasfield.
出处
《油气藏评价与开发》
2011年第4期21-27,共7页
Petroleum Reservoir Evaluation and Development
基金
国家财政部2007年矿产资源补偿费保护项目(P07085-4)
关键词
回压试井
修正等时试井
天然气水合物
试井解释
火山岩
松南气田
back-pressure well testing, modified isochronal well testing, gas hydrate, well testing interpretation, volcanic rocks,Songnan gasfield
