莺歌海盆地中央底辟带东方A气田A-5井区Y2Ⅱ下气组为受构造与岩性控制的气藏,井区范围内A-5井钻遇薄气层,对地质储量级别的认识存在争议.通过新钻井及区域测井、地震、录井等资料的分析研究,明确了研究区主体区块储层厚度大,砂体含气性具有高置信度,储层物性好,类比分析具有工业产能,A-5井区Y2Ⅱ下气组地质储量级别由控制升级为探明.
The A-5 well area Y2Ⅱdn of Dongfang A Gas Field in the central diapir zone of Yinggehai Basin is a gas reservoir controlled by structure and lithology,and the A-5 well is drilled into a thin gas layer within the well area.Through the analysis and research of new drilling,logging,seismic and logging data in the field,it is clear that the main block of the study area has large reservoir thickness,high confidence of gas bearing sand body,good reservoir physical property,industrial productivity by analogy analysis,The level of geological reserves of Y2Ⅱ dn in A-5 well area has been upgraded from control to proved.