学术论文

      辽中凹陷中洼高陡走滑带油气富集新模式

      摘要:
      辽中凹陷中洼高陡走滑带是多期、多种应力方式作用下形成的复杂断裂构造带,控制了辫状河三角洲、扇三角洲等多种沉积体系,发育了水下分流河道、水下分流河道间、河口坝、远砂坝和浊积席状砂等多类型的砂体。该高陡走滑带呈现一种“阶梯贯穿式”油气富集新模式,具有以下3大特征:一是油气呈阶梯式分布,具有多层系含油的复式成藏特征;二是单个油藏油柱高为150~200 m,油水界面之外油气显示差,显示高陡走滑带油气快速运移的特征;三是“走滑增弯圈闭-活动调节断层-富砂沉积体系”三元耦合控制高陡走滑带的油气富集。辽中凹陷中洼高陡走滑带油气富集新模式的建立对围区及相似地区的油气勘探具有重要的指导与借鉴意义。
      Abstract:
      As a complex faulted structure formed inmultiple episodes and under various stress states in Mid sag,Liaozhong depression,the highly steepstrike-slip belt was in control of multiple deposi-tional systems such as braided river delta and fandelta,where many types of sandbodies developed,including underwater distributary channel,estuarybarrier,distal bar and turbidite sheet.There is anew model of hydrocarbon accumulation,called“ladderlike penetration style”,along the highlysteep strike-slip belt,which can be characterizedby:(1)Ladderlike distribution of hydrocarbon hasresulted in a kind of composite accumulation ofmultiple oil-bearing beds;(2)A single oil columnthickness may be 150 to 200 m,and the hydrocar-bon show is poor beyond the oil-water contact,in-dicating quick hydrocarbon migraion in the highlysteep strike-slip belt;(3)The hydrocarbon enrich-ment is controlled by the three element coupling of“increasingly bendable traps due to strike slipping-active adjusted faults-depositional systems withhigh sand”.This new model of hydrocarbon accu-mulation may provide an important guide and ref-erence for the hydrocarbon exploration in the sur-rounding and similar areas of the highly steepstrike-slip belt,Mid sag,Liaozhong depression.
      Author: Zhang Rucai Xu Changgui Wu Kui Huang Xiaobo Peng Jingsong
      作者单位: 中海石油 中国 有限公司天津分公司
      刊 名: 中国海上油气 ISTICPKU
      年,卷(期): 2014, (1)
      机标分类号: TE1 P61
      在线出版日期: 2014年3月12日
      基金项目: 国家科技重大专项“近海大中型油气田形成条件与分布(编号2011ZX05023-006)”资助。