塔中地区油气运聚特征  

Characterization of Hydrocarbon Accumulation in Tazhong Area, Tarim Basin

作　　者：尚雅珍[1] 王保才[1] 解晨[1] 王瑞华[1] 葛玉银[2] 

机构地区：[1]中原油田分公司勘探开发科学研究院 [2]中原油田采油二厂

出　　处：《海相油气地质》2004年第1期97-104,共8页Marine Origin Petroleum Geology

摘　　要：塔中地区主要受塔中Ⅰ号、Ⅱ号及Ⅲ号三条大断层控制 ,形成巨型复式背斜 ,隆起高部位地层遭受了强烈的风化剥蚀。背斜之上 ,断裂和局部构造发育。可划分出两个主要成藏期 :第Ⅰ成藏期为寒武系—下奥陶统烃源岩成熟生烃运移期 ,生排烃高峰为志留纪 ;第Ⅱ成藏期为中—上奥陶统烃源岩在燕山期—喜马拉雅期成熟生烃运聚。第Ⅰ成藏期形成的油藏有两个特征 :在塔中Ⅰ号断裂带、北部斜坡带油气注入奥陶系及志留系圈闭中 ,形成原生油气藏 ;构造高部位 (如中央断垒带 )的油气藏在后期构造运动中遭受破坏。第Ⅱ成藏期形成的油藏可分为两类 :对早期油藏的再次充注 ;聚集形成新油藏。塔中地区的油气运移通道主要有断裂和不整合面 ,油气的分布也主要受断裂和不整合面所控制。Under the control of the three large fracture belts, the convex strata on Paleozoic uplifts of the huge compound anticline was intensively weathered and denudated in Tazhong area. Fractures and unconformities dominate hydrocarbon distribution and also was the ways of hydrocarbon migration. Two stages of hydrocarbon generation, accumulation and emplacement occurred during history. In the StageⅠ, hydrocarbon in the Cambrian-Lower Ordovician source rocks was migrated and emplaced into Ordovician and Silurian traps in Fracture Belt 1 and the North Slope Belt during Silurian period In the Stage Ⅱ, hydrocarbon in the Middle-Lower Ordovician source rocks was migrated and emplaced into the primary Ordovician and Silurian traps once more or into late traps to form new reservoirs during Yanshanian-Himalayan orogenic period. It is suggested that the Fracture Belt 1 and the North Slope Belt are the most potential areas.

关 键 词：油气运聚 构造特征 塔中隆起 断层控制 

分 类 号：TE122.12[石油与天然气工程—油气勘探]