CAJ | 학술논문

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。
료중요함중와고두주활대시다기、다충응력방식작용하형성적복잡단렬구조대，공제료변상하삼각주、선삼각주등다충침적체계，발육료수하분류하도、수하분류하도간、하구패、원사패화탁적석상사등다류형적사체。해고두주활대정현일충“계제관천식”유기부집신모식，구유이하3대특정：일시유기정계제식분포，구유다층계함유적복식성장특정；이시단개유장유주고위150～200 m，유수계면지외유기현시차，현시고두주활대유기쾌속운이적특정；삼시“주활증만권폐-활동조절단층-부사침적체계”삼원우합공제고두주활대적유기부집。료중요함중와고두주활대유기부집신모식적건립대위구급상사지구적유기감탐구유중요적지도여차감의의。
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.