塔里木盆地满深1井奥陶系超深断控碳酸盐岩油气藏勘探重大发现及意义

Great discovery and its significance of exploration for Ordovician ultra-deep fault-controlled carbonate reservoirs of Well Manshen 1 in Tarim Basin

位于塔里木盆地北部坳陷的满深1井在奥陶系一间房组获得重大突破。通过对满深1井成藏条件、油藏特征及富集规律的深入研究,总结了塔里木盆地北部坳陷断控岩溶区高产井油气成藏模式和富集规律。塔里木盆地海相碳酸盐岩主要发育潜山岩溶、层间岩溶、礁滩岩溶和断控岩溶4种不同的岩溶类型,满深1井钻遇断控岩溶;满深1井是迄今为止断控岩溶油气藏埋藏最深、单井产量最高的发现井,在埋深7535m的奥陶系一间房组测试折日产油624m^3,折日产气37.13×10^4m^3;建立了断控岩溶油气藏3种富集模式,即线性走滑上倾高部位、张扭侧向高部位、压扭局部高部位。满深1井的成功钻探,是以断裂为核心的碳酸盐岩断控岩溶油气藏勘探思路的成功实践,实现了塔北隆起与塔中凸起之间的鞍部油气勘探的突破,对整个塔里木盆地深层—超深层油气勘探具有重大意义。

Well Manshen 1,located in the Northern depression of the Tarim Basin,made a great breakthrough in the Ordovician Yijianfang Formation.Based on the in-depth studies of hydrocarbon accumulation conditions,reservoir characteristics and enrichment patterns of Well Manshen1,hydrocarbon accumulation model and enrichment patterns of high-production wells in fault-controlled karst areas in the Northern Depression of the Tarim Basin are summarized.There are 4 types of marine carbonate rocks in the Tarim Basin:buried hill karst,interlayer karst,reef-shoal karst and fault-controlled karst.Well Manshen 1 penetrated fault-controlled karst.Well Manshen 1 is a discovery well of fault-controlled karst reservoir with the deepest burial depth and the highest single well production so far.In the Yijianfang Formation of Ordovician with a buried depth of 7535m,the tested oil production is 624m^3/d and the gas production is 37.13×10^4m^3/d.Three enrichment patterns of fault-controlled karst reservoirs are established,i.e.linear strike-slip up-dip high position,transtensional lateral high position and compressive-shear local high position.The discovery of Well Manshen 1 is a successful practice of the exploration idea of fault-controlled karst carbonate reservoirs with faults as the core.It has achieved the breakthrough of oil and gas discovery in the saddle position between the Tabei uplift and the Tazhong bulge,which is of great significance to the deep and ultra-deep oil and gas exploration in the whole Tarim Basin.