摘要
通过对准噶尔盆地玛湖凹陷西斜坡二叠系攻关研究,证实了风城组云质岩储层是获得优质高效规模储量的有利储层。这类储层岩性主要为云质粉砂岩和泥质云岩,形成于稳定、低能的静水环境,储层微裂缝发育。裂缝发育程度、溶孔与裂缝的配置关系和储层中云质含量高低,是影响储层优劣的关键因素。二叠系风城组优质储层分布区,往往是风城组一段云质岩储层平面分布稳定、纵向厚度大、上部风二段膏岩盖层发育的区域,同时位于断裂带或裂缝发育区。
Through the research on Permian System on the west slope of Mahu sag in Junggar Basin,it is verified that the dolomite reservoir of Fengcheng Formation is favorable for acquiring large-scale high-quality and high-efficiency reserves.These reservoirs are mainly dolomite siltstone and arenaceous dolomite,formed in stable and low-energy still water environment,where microfractures developed.The development degree of fractures,the layout relationship between dissolved pore and fracture,and the volume of dolomite in reservoirs are key factors influencing whether the quality of reservoirs is good or bad.The area where high-quality reservoir of Permian Fengcheng Formation is generally where the dolomite reservoir of the first member of Fengcheng Formation is horizontally and stably distributed and thick vertically and the gypsum reservoir of the second member of Upper Fengcheng Formation developed.At the same time,the area is located at the fault zone or fracture developing zone.
出处
《中国石油勘探》
CAS
2012年第3期8-11,7,共4页
China Petroleum Exploration
基金
"十二五"国家科技重大专项大型油气田及煤层气开发项目"准噶尔前陆盆地油气富集规律
勘探技术与区带和目标优选(2011ZX05003-005)"
关键词
准噶尔盆地
二叠系云质岩
微裂缝
控制因素
有利区
Junggar Basin
Permian dolomite
microfracture
controlling factor
favorable area
