迪那2气田气藏类型研究

THE KIND OF DINA 2 GAS FIELD

迪那2气田位于库车坳陷秋里塔格构造带东部,是在塔里木盆地发现的第二个地质储量上亿方的大气田,主要含气层系为下第三系。由于测试作业风险很大,获取的温度、压力资料有限,故确定气藏类型难度大。利用测试结果、测井泥岩声波趋势线、储层横向预测结果及烃类检测结果,并结合沉积储层特征等综合研究手段,研究了迪那2气田气藏的类型,认为迪那2气田是由3个气藏组成的常温超高压、低含凝析油的层状边水凝析气藏。

Dina 2 gas field is situated on the eastern side of Qiulitage structure belt,Kuche depression. It is the second biggest gas field found in Tarim basin.Paleogene sand is the major bearing gas layer.Because of the risk of formation test,the data of temperature and pressure are limited, it's difficult to confirm the gas reservoir's mode. In the face of this situation,we adopted the result of formation test,the trendline of logging sound wave in shale,the forecast of reservoir's landscape orientation and the result of hydrocarbon testing,also combined the feature of reservoir and sediment.Based on above research work, we draw a right conclusion to the mode of gas reservoir,that's dina 2 gas field is a bedding condesate gas field composed of 3 gas reservoirs,which has formal temperature, super-overpressure,low condesate oil.