CAJ | 학술논문

笔者通过大量的岩心观察、测井及录井资料的研究,结合粒度分析,对齐家北地区泉四段沉积特征进行了系统的分析,共识别出三角洲平原和三角洲前缘两个亚相和水上分流河道、天然堤、分流河道间湾、水下分流河道、水下分流河道间湾、河口坝、远砂坝等7个微相.通过对研究区内泉四段7个含油小层的平面展布特征及沉积演化规律的深入研究,并结合泉四段砂体的含油气性分布特征综合分析研究表明:研究区油气分布明显受控于沉积微相的展布;水下分流河道由于具油源近、储集物性较好而成为最有利的油气聚集相带;河口坝、水上分流河道是油气富集的较有利相带.
필자통과대량적암심관찰、측정급록정자료적연구,결합립도분석,대제가북지구천사단침적특정진행료계통적분석,공식별출삼각주평원화삼각주전연량개아상화수상분류하도、천연제、분류하도간만、수하분류하도、수하분류하도간만、하구패、원사패등7개미상.통과대연구구내천사단7개함유소층적평면전포특정급침적연화규률적심입연구,병결합천사단사체적함유기성분포특정종합분석연구표명:연구구유기분포명현수공우침적미상적전포;수하분류하도유우구유원근、저집물성교호이성위최유리적유기취집상대;하구패、수상분류하도시유기부집적교유리상대.
The examination of the sedimentary microfacies of the fourth member of the Lower Cretaceous Quantou Formation in northern Qijia is based on the cores, well logs and granulometric analysis. Seven sedimentary microfacies have been distinguished, including the distributary channel, natural levee, interdistributary bay, subaqueous distributary channel, subaqueous interdistributary bay, channel mouth bar and distal bar microfacies grouping into the delta plain and delta front subfacies. The oil and gas distribution is mostly controlled by the sedimentary microfacies cited above. The subaqueous distributary channel microfacies is selected as the most favourable area for hydrocarbon accumulation due to the proximal provenance and good reservoir quality whereas the channel mouth bar and distributary channel microfacies are considered as the favourable area for hydrocarbon accumulation.