库车坳陷秋里塔格构造带的战略突破与前景展望
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摘要
秋里塔格构造带是塔里木盆地库车坳陷重要的油气勘探区带之一,勘探前期在东西两侧发现了迪那2大型凝析气田和却勒1油藏、东秋8浅层气藏,之后16年持续勘探始终未获油气发现。秋里塔格构造带地表刀片山体沟壑纵横,地下复合盐岩层变形强烈,二维地震资料品质差,难以准确落实构造。围绕"落实圈闭"这一主要勘探技术瓶颈,强化区域地质综合研究,理清构造分段特征,聚焦秋里塔格构造带中秋段勘探领域;强化二维宽线采集处理攻关,批量发现圈闭显示,锁定突破口;科学决策、超前部署东秋8山地三维,精准落实盐下中秋1构造圈闭,部署上钻中秋1风险探井,在白垩系巴什基奇克组获得高产工业油气流,实现了战略突破,展示了秋里塔格构造带广阔的油气勘探前景。
In the Qiulitag structural belt, one of the important oil and gas exploration zones in Kuqa depression of the Tarim Basin, early exploration discovered the large Dina 2 condensate gas field, the Chaule 1 reservoir and the Dongqiu 8 shallow reservoir on the east and west sides. Since then, no gas reservoir has been found for 16 years. In the Qiulitag structural belt, the surface condition is difficult with bladelike ridges here and there, and the underground composite salt layer is strongly deformed. Resulting in poor 2 D seismic data, it's difficult to accurately identify the structure. In this study, by focusing on the task to break through exploration technology bottleneck in "identifying traps", and strengthening the regional geological research, structural segments were described, especially the Zhongqiu segment of the Qiulitag structural belt; by improving 2 D wide-line seismic acquisition and processing, traps were found in batches, and the breakthrough was located;by scientific decision-making, and advanced deployment of Dongqiu 8 mountain 3 D seismic survey, the subsalt Zhongqiu 1 structural trap was identified and an exploration well, Zhongqiu 1, was drilled. High-yield industrial oil/gas flow was obtained from the Cretaceous Bashijiqik Formation, proving a strategic breakthrough and indicating a bright future in oil and gas exploration in the Qiulitag structural belt.
In the Qiulitag structural belt, one of the important oil and gas exploration zones in Kuqa depression of the Tarim Basin, early exploration discovered the large Dina 2 condensate gas field, the Chaule 1 reservoir and the Dongqiu 8 shallow reservoir on the east and west sides. Since then, no gas reservoir has been found for 16 years. In the Qiulitag structural belt, the surface condition is difficult with bladelike ridges here and there, and the underground composite salt layer is strongly deformed. Resulting in poor 2 D seismic data, it's difficult to accurately identify the structure. In this study, by focusing on the task to break through exploration technology bottleneck in "identifying traps", and strengthening the regional geological research, structural segments were described, especially the Zhongqiu segment of the Qiulitag structural belt; by improving 2 D wide-line seismic acquisition and processing, traps were found in batches, and the breakthrough was located;by scientific decision-making, and advanced deployment of Dongqiu 8 mountain 3 D seismic survey, the subsalt Zhongqiu 1 structural trap was identified and an exploration well, Zhongqiu 1, was drilled. High-yield industrial oil/gas flow was obtained from the Cretaceous Bashijiqik Formation, proving a strategic breakthrough and indicating a bright future in oil and gas exploration in the Qiulitag structural belt.
引文
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[10]杨海军,李曰俊,师骏,肖安成,黄少英,吴根耀,等.南天山晚新生代褶皱冲断带构造特征[J].第四纪研究,2010,30(5):1030-1043.Yang Haijun,Li Yuejun,Shi Jun,Xiao Ancheng,Huang Shaoying,Wu Genyao,et al.Tectonic characteristics of the late Cenozoic south Tianshan fold-thrust belt[J].Quaternary Sciences,2010,30(5):1030-1043.
[11]李勇,杨海军,郭小文,雷刚林,孙雄伟.库车前陆盆地超压特征及测井响应[J].地质科技情报,2015,34(2):130-136.Li Yong,Yang Haijun,Guo Xiaowen,Lei Ganglin,Sun Xiongwei.Characteristics of overpressure and well-log responses in Kuqa foreland basin[J].Geological Science and Technology Information,2015,34(2):130-136.
[2]杜金虎,何海清,皮学军,郭绪杰,周海民,邹才能,等.中国石油风险勘探的战略发现与成功做法[J].中国石油勘探,2011,16(1):1-9.Du Jinhu,He Haiqing,Pi Xuejun,Guo Xujie,Zhou Haimin,Zou Caineng,et al.CNPC obtained strategic discoveries and successful experience in venture exploration[J].China Petroleum Exploration,2011,16(1):1-9.
[3]滕学清,李勇,杨沛,杨克基,李宁,谢恩.库车坳陷东段差异构造变形特征及控制因素[J].油气地质与采收率,2017,24(2):15-21.Teng Xueqing,Li Yong,Yang Pei,Yang Keji,Li Ning,Xie En.Differential structural deformation and its control factors in the eastern segment of Kuqa depression[J].Petroleum Geology and Recovery Efficiency,2017,24(2):15-21.
[4]杜金虎,何海清,杨涛,李建忠,黄福喜,郭彬程,等.中国致密油勘探进展及面临的挑战[J].中国石油勘探,2014,19(1):1-9.Du Jinhu,He Haiqing,Yang Tao,Li Jianzhong,Huang Fuxi,Guo Bincheng,et al.Progress in China’s tight oil exploration and challenges[J].China Petroleum Exploration,2014,19(1):1-9.
[5]冯洁,宋岩,姜振学,李宝帅,李峰.塔里木盆地克深区巴什基奇克组砂岩成岩演化及主控因素[J].特种油气藏,2017,24(1):70-75.Feng Jie,Song Yan,Jiang Zhenxue,Li Baoshuai,Li Feng.Diagenetic evolution and major controlling factors for sandstone in Bashijiqike Formation of the Keshen area in the Tarim Basin[J].Special Oil&Gas Reservoirs,2017,24(1):70-75.
[6]易士威,杜金虎,杨海军,李君,李勇.塔里木盆地下古生界成藏控制因素及勘探思路[J].中国石油勘探,2012,17(3):1-8.Yi Shiwei,Du Jinhu,Yang Haijun,Li Jun,Li Yong.Controlling factors and exploration idea about reservoir formation of Lower Palaeozoic,Tarim Basin[J].China Petroleum Exploration,2012,17(3):1-8.
[7]王珂,张荣虎,方晓刚,王俊鹏,张同辉.超深层裂缝-孔隙型致密砂岩储层特征与属性建模--以库车坳陷克深8气藏为例[J].中国石油勘探,2018,23(6):87-96.Wang Ke,Zhang Ronghu,Fang Xiaogang,Wang Junpeng,Zhang Tonghui.Characteristics and property modeling of ultra-deep fractured-porous tight sandstone reservoir:a case study on the Keshen 8 gas reservoir in Kuqa depression[J].China Petroleum Exploration,2018,23(6):87-96.
[8]张杨,杨向同,滕起,徐永辉,薛艳鹏,徐国伟,等.塔里木油田超深高温高压致密气藏地质工程一体化提产实践与认识[J].中国石油勘探,2018,23(2):43-50.Zhang Yang,Yang Xiangtong,Teng Qi,Xu Yonghui,Xue Yanpeng,Xu Guowei,et al.Practice and cognition of geology-engineering integration for the production increasing of HTHP ultra-deep tight gas reservoir in Tarim oilfield[J].China Petroleum Exploration,2018,23(2):43-50.
[9]李勇,漆家福,师俊,孙统,徐振平,余海波,等.塔里木盆地库车坳陷中生代盆地性状及成因分析[J].大地构造与成矿学,2017,41(5):829-842.Li Yong,Qi Jiafu,Shi Jun,Sun Tong,Xu Zhenping,Yu Haibo,et al.Characteristics of Mesozoic basin in Kuqa depression,Tarim Basin[J].Geotectonica et Metallogenia,2017,41(5):829-842.
[10]杨海军,李曰俊,师骏,肖安成,黄少英,吴根耀,等.南天山晚新生代褶皱冲断带构造特征[J].第四纪研究,2010,30(5):1030-1043.Yang Haijun,Li Yuejun,Shi Jun,Xiao Ancheng,Huang Shaoying,Wu Genyao,et al.Tectonic characteristics of the late Cenozoic south Tianshan fold-thrust belt[J].Quaternary Sciences,2010,30(5):1030-1043.
[11]李勇,杨海军,郭小文,雷刚林,孙雄伟.库车前陆盆地超压特征及测井响应[J].地质科技情报,2015,34(2):130-136.Li Yong,Yang Haijun,Guo Xiaowen,Lei Ganglin,Sun Xiongwei.Characteristics of overpressure and well-log responses in Kuqa foreland basin[J].Geological Science and Technology Information,2015,34(2):130-136.