准噶尔西北缘风城期构造沉积格局及源岩分布  

Structural Sedimentary Pattern and Source Rock Distribution of Fengcheng Formation at Northwestern Margin of the Junggar Basin

作　　者：沈扬[1] 李晓剑[2] 贾凡建[2] 高剑雄[2] 丁咸宝[2] 

机构地区：[1]中国石油大学,北京102249 [2]中国石化胜利油田分公司,山东东营257015

出　　处：《特种油气藏》2015年第4期16-19,151,共4页Special Oil & Gas Reservoirs

基　　金：国家油气重大专项"大型油气田及煤层气开发"(2011ZX05002-002)

摘　　要：准噶尔盆地西北缘早二叠世风城期的构造背景和沉积环境存在争议，制约了源岩分布预测及勘探潜力评价。重新厘定了风城期构造沉积背景，明确了地质结构及连通性演化，预测了源岩分布。研究表明，早二叠世处于区域碰撞造山后的拉张背景，发育伸展断陷盆地。风城期西北缘与南缘的水体总体保持连通，属于海相沉积环境，风城期有利于源岩发育，源岩边界向西北推移10～20km.克拉玛依以北地区深部可能掩覆有部分风城组优质源岩，具有一定勘探潜力。There are controversies on structural background and sedimentary environment at the northwestern margin of the Junggar Basin,which restrict the prediction of source rock and the evaluation on exploration potential. The structural sedimentary background of Fengcheng Formation was reviewed,geological evolution and connectivity evolution was identified and the distribution of source rocks was predicted. Studies have shown that early Permian is located at the tensional background after the orogenesis due to the collision,developing extensional faulted- depression basin. In general,water bodies at the northwestern margin and at the southern margin of the Fengcheng Formation remained connected,belonging to the marine sedimentary environment. Fengcheng Formation was favorable for the development of source rocks; the boundary of source rock moved 10- 20 km to the northwest. Deep north of Karamay may have some quality source rocks buried in Fengcheng Formation with a certain exploration potential.

关 键 词：构造沉积格局 烃源岩分布 早二叠世 风城组 准噶尔盆地西北缘 

分 类 号：TE122.3[石油与天然气工程—油气勘探]