准东石炭系烃源岩分布及勘探潜力分析

准东阜东斜坡fu26井在石炭系获高产气流、古城凹陷cheng1井见良好显示，同时均揭示厚层烃源岩，证实了准东石炭系具备形成天然气大场面的烃源岩基础。为了进一步落实准东石炭系天然气勘探潜力，通过区域统层、构造格局分析及井震匹配研究，整体落实了石炭系烃源岩分布及规模，为该区勘探指明了方向。区域统层研究表明，松喀尔苏组b段为石炭系主力烃源岩发育层段；构造格局分析表明，准东发育南北两大凹陷带，北部凹陷带已规模发现，南部凹陷带烃源岩规模发育，是下步探索的重点领域；井震匹配分析表明，南部凹陷带内主要发育东道海子、阜康、吉木萨尔和古城4大凹陷，其中，阜康和吉木萨尔凹陷烃源岩分布范围广、厚度大、生气强度大，具备形成规模天然气的资源基础。

An Analysis of Distribution of Carboniferous Source Rocks and Exploration Potential Analysis in Eastern Junggar Basin

Well fu26 of Fudong Slope in eastern Junggar Basin obtained high yield flow in the carboniferous system and Well cheng1 of Gucheng Sag showed good results, revealed thick layer source rocks, confirming that the Carboniferous in the southeast of the Junggar Basin has a hydrocarbon source for the formation of large natural gas scenes. In order to further realize the exploration potential of Carboniferous natural gas in the east of Junggar Basin, this paper, based on the analysis of regional geological strata, structural pattern and well earthquake matching of Carboniferous system, comprehensively implements the range and scale of Carboniferous source rocks, and points out the direction of recent exploration in this area. The study of regional strata shows that Songkarsu Formation b is the main effective hydrocarbon source rock segment of carboniferous; the structural pattern analysis shows that Eastern Junggar Basin developed two major depression systems:the north and the south depression, the north depression has been discovered on a large scale, and the south depression developed large scale Carboniferous source rock, which is the key area to be explored in the next step; well-seismic matching analysis shows that there are mainly four major sags, Dongdaohaizi, Fukang, Jimsar and Gucheng in the south depression. Among them, the source rocks in Fukang and Jimusar depressions have wide distribution range, large thickness and high gas generation intensity, and have the resource basis for large-scale natural gas.