摘要
和什托洛盖盆地位于新疆准噶尔盆地西北部,是大型逆冲褶皱带的一个中新生代盆地。目前,该盆地内共完钻3口井,勘探程度较低,通过钻探和野外露头发现该区发育多套烃源岩,油气成藏条件复杂。应用油气地球化学方法和石油地质理论对盆地各套烃源岩开展评价,同时对盆地内沉积、构造、储盖组合及保存条件开展综合分析,取得的认识为:中、下侏罗统煤系烃源岩是一套优质烃源岩,分布广,厚度较大;烃源岩有机质丰度较高,生烃潜力较好;有机质类型主要为Ⅲ型与Ⅱ:型;有机质成熟度进入生烃门限,能够形成煤成低熟油及煤成气,具备较好的生烃条件。盆地发育多套储盖组合、不同类型的圈闭和复合输导体系,哈山推覆体下部二叠系烃源岩生成的油气能向盆地运移,具备油气运移、聚集、保存和成藏的有利条件,具有较好的油气勘探前景。
The Heshituoluogai Basin is located in the northwest of Junggar basin, is an Early Mesozoic basin in the large thrust fold belt in northwest Junggar, Xinjiang. The basin drilled 3 wells, the low degree of exploration, which develops several sets of source rocks and the hydrocarbon accumulation conditions is complex. With the method of oil and gas geochemistry and the theory of petroleum geology to evaluate the hydrocarbon source rocks of the basin, and the sedimentary, tectonic, reservoir cap portfolio and reservoir preservation conditions to make a comprehensive analysis, it is concluded that ： the middle to lower Jurassic source rocks is a high quality source rocks, widely distributed, large thickness; higher abundance of organic matter; hydrocarbon potential is better; main types of organic matter are type Ⅲ and Ⅱ 2; the maturity of organic matter is up to hydrocarbon threshold, which can be formed into a low-mature oil and coal-bed gas, has good hydrocarbon generating conditions. There developed many sets of reservoir cap combination, different types of traps and composite conducting system, and the oil and gas from Permian source rocks in the lower of the Hala＇alt mountain nappe which can migrate to the basin, the hydrocarbon migration, aggregation, preservation and accumulation conditions is well, indicating that the basin has good prospects for oil and gas exploration.
出处
《非常规油气》
2014年第1期27-32,共6页
Unconventional Oil & Gas
基金
国家重点基础研究发展计划(973)项目"中国西部典型叠合盆地油气成藏机制与分布规律"(2006CB202306)
关键词
和什托洛盖盆地
烃源岩评价
成藏
油气勘探
Heshentuoluogai Basin
source rock evaluation
accumulation
oil and gas exploration
