塔里木盆地塔东地区油气地质条件与有利地质体资源潜力Hydrocarbon geological conditions and favorable geobodies resource potential of Tadong exploration area in Tarim Basin
李强,王显东,闫博,刘洋,张斌,钟拥,曹阳,邓蕊
LI Qiang,WANG Xiandong,YAN Bo,LIU Yang,ZHANG Bin,ZHONG Yong,CAO Yang,DENG Rui
摘要(Abstract):
大庆油田塔东探区主体位于塔里木盆地台盆过渡区满西台缘带,勘探程度低,资源潜力大。勘探主要集中在古城地区,未获规模突破。近年来通过老井复查、构造-岩相古地理研究,明确了台缘带油气基础地质条件,落实了成藏有利区带,拓展了塔里木盆地寒武系勘探新类型。结果表明:塔东探区发育玉满裂陷、玉都裂陷槽盆相,斜坡陆棚相等多套烃源岩;寒武系—中下奥陶统台缘带高能礁滩继承发育,多组走滑断裂控储、控藏、控富集;“黑被子”泥岩、“白被子”膏岩2套区域盖层分布广泛,源、储、盖紧密配置,具备规模成藏条件;纵向上,油气受走滑断裂及区域盖层控制,主要分布在中下奥陶统碳酸盐岩地层;横向上,以玉满、玉都裂陷槽为中心,油气规模富集;玉满奥陶系鹰山组上段断溶体、鹰山组下段礁滩-断溶复合体成藏条件优越,发育凝析气藏,是塔东最现实的效益勘探领域;寒武系盐下礁滩体、断控丘滩带源、储、盖配置好,资源潜力大,可作为增储上产的接替领域。塔东探区多领域均展现出万亿立方米的气资源规模,有望快速建成大庆油田稳油增气的重要基地。
The main part of Tadong exploration area of Daqing Oilfield is located in Manxi platform margin in platform-basin transition zone of Tarim Basin, with low exploration degree and large resource potential. The exploration is mainly concentrated in Gucheng area, without significant breakthrough. In recent years, through re-examination of old wells and structural-lithofacies paleogeography research, basic hydrocarbon geological conditions in platform margin are clarified, favorable plays for hydrocarbon accumulation are determined, and new exploration type in Cambrian is expanded. The results show that several sets of source rocks develop in Tadong exploration area, including Yuman and Yudu rift basin facies, and slope-shelf facies. High-energy reef-beach develops inherited in Cambrian-Middle and Lower Ordovician platform margin belt, with several sets of strike-slip faults controlling reservoir, accumulation and enrichment. 2 sets of regional cap rock of “black quilt” shale and “white quilt” gypsolyte are widely distributed, forming complete source-reservoir-seal assemblages, and providing conditions for largescale accumulation. Vertically, oil and gas are controlled by strike-slip faults and regional cap rock, mainly distributed in Middle-Lower Ordovician carbonate strata. Horizontally, large-scale oil and gas enriched centering around Yuman and Yudu rift troughs. Fault-karst in upper member and reef-beach-fault-karst complex bodies in lower member of Yuman Ordovician Yingshan Formation have superior accumulation conditions and develop condensate gas reservoirs, being the most realistic benefit exploration field in Tadong area. Cambrian pre-salt reef-beaches and fault-controlled mound-beach belt have good source-seal assemblage and large resource potential, and can serve as replacement field for increasing reserves and production. Tadong exploration area presents resource scale of trillions cubic meters in many fields, and is expected to build an important base in a short period for stabilizing oil production and increasing gas production in Daqing Oilfield.
关键词(KeyWords):
塔东地区;满西台缘带;烃源岩;台缘礁滩;走滑断裂;奥陶系
Tadong area;Manxi platform margin belt;source rock;platform margin reef-beach;strike-slip fault;Ordovician
基金项目(Foundation): 中国石油天然气股份有限公司重大科技专项“塔东天然气成藏理论及勘探配套技术研究”(2016E-0204)
作者(Author):
李强,王显东,闫博,刘洋,张斌,钟拥,曹阳,邓蕊
LI Qiang,WANG Xiandong,YAN Bo,LIU Yang,ZHANG Bin,ZHONG Yong,CAO Yang,DENG Rui
DOI: 10.19597/J.ISSN.1000-3754.202401061
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- 塔东地区
- 满西台缘带
- 烃源岩
- 台缘礁滩
- 走滑断裂
- 奥陶系
Tadong area - Manxi platform margin belt
- source rock
- platform margin reef-beach
- strike-slip fault
- Ordovician