CAJ | 학술논문

珠江口盆地珠一坳陷北部洼陷带古近系可划分为8个洼陷，地震相类比分析认为有5个洼陷的文昌组发育中深湖相沉积，其中西江主洼、惠州5洼及惠州10洼的文昌组中深湖相分布规模较大；北部洼陷带恩平组沉积时期为局限性沼泽化浅水沉积，湖沼相煤系泥岩和浅湖相泥岩是恩平组主要烃源岩，其中惠州8洼恩平组湖沼相分布规模最大，而西江主洼则发育较大规模的浅湖相沉积。对比北部洼陷带文昌组与恩平组2套烃源岩的分布规模、热成熟程度及盆地生烃模拟等指标，综合分析认为西江主洼、惠州5洼、惠州10洼和惠州8洼为潜在富生烃洼陷，具有较好的勘探潜力。
주강구분지주일요함북부와함대고근계가화분위8개와함，지진상류비분석인위유5개와함적문창조발육중심호상침적，기중서강주와、혜주5와급혜주10와적문창조중심호상분포규모교대；북부와함대은평조침적시기위국한성소택화천수침적，호소상매계니암화천호상니암시은평조주요경원암，기중혜주8와은평조호소상분포규모최대，이서강주와칙발육교대규모적천호상침적。대비북부와함대문창조여은평조2투경원암적분포규모、열성숙정도급분지생경모의등지표，종합분석인위서강주와、혜주5와、혜주10와화혜주8와위잠재부생경와함，구유교호적감탐잠력。
In the northern sag belt,Zhu 1 depres-sion,Pearl River Mouth basin,there are eight Pa-leogene sags,five of which are believed to containWenchang formation sediments of semideep lacus-trine facies according to the analogy of seismic faci-es,with their larger distribution in Xijiang First,Huizhou 5 and Huizhou 10 sags.During Enpingformation sedimentation,the northern sag belt wasin a confined,palustral and shallow water environ-ment,and the main source rocks in Enping forma-tion are the coal-measure mudstone of lacustrine-palustral facies and the shale of shallow lacustrinefacies,with the largest distribution of the lacus-trine-palustral facies in Huizhou 8 sag and the lar-ger distribution of the shallow lacustrine facies inXijiang First sag.By comprehensively analyzingthe distribution,thermal maturity and basin hy-drocarbon-generation simulation indicators of thetwo sets of source rock in Wenchang and Enpingformation,it is considered that Xijiang First,Huizhou 5 Huizhou 10 and Huizhou 8 sags are la-tent hydrocarbon-rich sags with great explorationpotential.