王集油田西南缘录井油气层解释方法

Mud logging hydrocarbon interpretation method in Wangji oilfield southwestern margin

王集油田西南缘是一个受断层与岩性双重控制的含油区块,该区块具有含油层位多、含油井段长、单层含油厚度薄、储层物性差的特征,岩屑录井显示为荧光、油迹等级别,岩性主要为细砂岩,并具有不同性质流体气测数值分异性较差、中浅层系与深层系气测成分构成不同、地化含量不同的油气异常显示特点。在分析本区的录井显示特点及制作大量交会图的基础上,建立了本区录井异常显示的识别标准,分中浅层与深层系建立了气测、地化异常显示解释图版。这些图版经新井验证,能够满足本区解释评价的要求,特别是对E王30井精细解释并经试油验证成功,为核三段中浅层系一些原来认为干层、差油层的层挖潜提供了启迪。

Wangji oilfield southwestern margin is an oil bearing block controled by fault and lithology,oil bearing layer is more,oil bearing segment is long,single layer oil bearing thickness is thin,reservoir property is poor.Rock cutting logging show includs fluorescent and oil trace.Mainly consists of fine sandstone,different nature fluid gas logging data difference is bad,gas logging construction is different in middle shallow layer and deep layer,different geochemical content shows abnormally.Based on logging show features and a large number of cross plots chart,abnormal show identification criteria has been established,gas logging,geochemical abnormal display interpretation chart has been established for middle shallow layer and deep layer.Tested with new well,it can meet the requirement of interpretation and evaluation.Especially,the fine interpretation of E Wang 30 well and successful testing provided reference for previously thought dry layer and bad oil layer in H3 segment middle shallow layer.Aiming at the present situation in the study area,most of layers have to go through transform to acquire industrial oil fluid,this article provided suggestion to the option of transformed layer.