CAJ | 학술논문

应用层序地层学和沉积学原理及方法，建立松辽盆地七棵树油田沙河子组层序地层格架，并划分沉积相，识别了沉积相在纵向上的演化规律和横向上的展布特征。同时，在上述研究基础之上分析层序地层格架内砂体的展布特征和油气的分布规律，并预测了研究区岩性油气藏的类型及分布。研究结果表明：沙河子组为一个三级层序，内部可划分出2个四级层序，其整体演化经历了一个由快速退积到缓慢进积的过程。受构造沉降、湖平面变化和沉积物供给的影响，砂体主要发育在四级层序的基准面下降半旋回，是寻找岩性透镜体油气藏和岩性上倾尖灭油气藏的有利部位。
응용층서지층학화침적학원리급방법，건립송료분지칠과수유전사하자조층서지층격가，병화분침적상，식별료침적상재종향상적연화규률화횡향상적전포특정。동시，재상술연구기출지상분석층서지층격가내사체적전포특정화유기적분포규률，병예측료연구구암성유기장적류형급분포。연구결과표명：사하자조위일개삼급층서，내부가화분출2개사급층서，기정체연화경력료일개유쾌속퇴적도완만진적적과정。수구조침강、호평면변화화침적물공급적영향，사체주요발육재사급층서적기준면하강반선회，시심조암성투경체유기장화암성상경첨멸유기장적유리부위。
On the basis of the sequence stratigraphy and sedimentology,the sequence stratigraphic framework and sedimentary facies of Shahezi Formation in Qikeshu oilfield,Songliao Basin were established,and the dis-tribution characteristics of sandstone and the rules of hydrocarbon accumulation within the sequence stratigraphic framework were analyzed,then the type and distribution of lithologic reservoir were predicted.The results show that Shahezi Formation is a third-order sequence and can be subdivided into two fourth-order sequences,experi-encing an evolution process from rapid regression to slow transgression.The development of sand bodies is con-trolled by the tectonic effect,lake-level change and sediment supply,and the sand bodies mainly grow in the descending base-level cycles of the fourth-order sequence,which are favorable exploration zones for lithologic reservoirs.