摘要
塔里木盆地库车坳陷克拉苏构造带克探1井在白垩系亚格列木组下段砂砾岩获得重大突破,实现了“克拉之下找克拉”的构想,对白垩系深层勘探具有重要意义。通过对克探1井成藏条件、储层特征、构造模型的深入研究,明确了克拉苏构造带侏罗系—三叠系供烃、白垩系亚格列木组裂缝型砂砾岩成储、上覆白垩系舒善河组泥岩成盖的生储盖组合,并建立了“下生上储、垂向输导、立体成藏”新模式。克探1井的成功钻探,证实了克拉苏构造带白垩系巴什基奇克组之下仍具备优越的储盖组合,并且越向深层靠近烃源岩,成藏条件越有利。同时亚格列木组断背斜圈闭成排成带,展示出巨大的勘探潜力,可形成新的天然气战略接替区。
A major breakthrough has been obtained in the glutenite reservoir in the lower member of the Cretaceous Yagelem Formation in Well Ketan 1 located in Kela 2 trap of Kelasu Structural Belt in Tarim Basin,realizing the idea of“discovering another Kela gas field below Kela Gas Field”,which is of great significance to the exploration of the deep Cretaceous.The in-depth study of hydrocarbon accumulation conditions,reservoir physical properties and structural model in Well Ketan 1 is conducted,which supports to identify the hydrocarbon accumulation assemblage of“hydrocarbon supply by source rock in the Jurassic-Triassic,fractured type sandstone reservoir in Yagelem Formation,and mudstone cap rock in Shushanhe Formation”and establish a new hydrocarbon accumulation pattern of“lower generation and upper storage,vertical transport and stereoscopic accumulation”in Kelasu Structural Belt.The successful drilling of Well Ketan 1 confirms that there is superior reservoir-cap rock assemblage below the Cretaceous Bashijiqik Formation in Kelasu Structural Belt,and the hydrocarbon accumulation conditions are more favorable when approaching to the deep source rock.In addition,the fault-anticline traps in Yagelem Formation are developed in rows and belts,which show great resource potential and can form a new strategic replacement area for gas exploration.
作者
王清华
杨海军
徐振平
杨宪彰
李勇
蔡振忠
周露
Wang Qinghua;Yang Haijun;Xu Zhenping;Yang Xianzhang;Li Yong;Cai Zhenzhong;Zhou Lu(PetroChina Tarim Oilfield Company,841000)
出处
《中国石油勘探》
CAS
CSCD
北大核心
2023年第2期1-10,共10页
China Petroleum Exploration
基金
国家重点研发项目“塔里木盆地盐下超深层大型油气田形成机理与分布预测”课题“塔里木盆地盐下超深层油气分布规律及有利勘探区带评价”(2019YFC0605505)。
