CAJ | 학술논문

为深化准噶尔盆地玛湖斜坡区的油气勘探，通过分析成藏特征与有利条件，研究了东斜坡地区深层的油气成藏和勘探新领域。结果发现，二叠系/三叠系不整合界面上下是油气成藏和勘探的重要目标，其目的层系油质轻、保存条件好、存在有利相带与相对优质储层，因而具备形成高产的潜力，并可能主要位于扇三角洲前缘亚相。通过单井相、地震相分析和井震结合等方法，预测了有利相带的空间分布及主要发育的圈闭类型，发现有利勘探面积大，岩性-地层圈闭广泛发育，且当前勘探程度低，故勘探前景广阔，可望开辟勘探新领域，值得在下步勘探中加强探索。
위심화준갈이분지마호사파구적유기감탐，통과분석성장특정여유리조건，연구료동사파지구심층적유기성장화감탐신영역。결과발현，이첩계/삼첩계불정합계면상하시유기성장화감탐적중요목표，기목적층계유질경、보존조건호、존재유리상대여상대우질저층，인이구비형성고산적잠력，병가능주요위우선삼각주전연아상。통과단정상、지진상분석화정진결합등방법，예측료유리상대적공간분포급주요발육적권폐류형，발현유리감탐면적대，암성-지층권폐엄범발육，차당전감탐정도저，고감탐전경엄활，가망개벽감탐신영역，치득재하보감탐중가강탐색。
In order to deepen the hydrocarbon exploration in the slope area of the Mahu Sag,northwestern Junggar Basin, and to provide a reference for studies with similar geological settings worldwide,we investigated the field of hydrocarbon accumulation and exploration in the deep strata of the eastern slope area. This was conducted based on analyzing accumulation features and conditions. Results show that the deep strata surrounding the Permian-Triassic unconformity is a key target of exploration in the studied area. In the target Permian and Triassic reservoirs,the oil is light in nature and they have good preserving conditions,favorable facies and relatively good-quality reservoir. Thus,high production may be likely,especially in the sub-facies of fan delta front. Combined with analyses of sedimentary and seismic facies and an integration/comparison of wells and seismic data,we investigated the spatial distribution of favorable facies and the dominant trap types. Results show that the favorable exploration area is large and the lithologic and stratigraphic trap is widely developed. Considering the low exploration level currently,the exploration prospect is wide and large. This likely provides a new exploration field and,thus, deserves to be strengthened in the future exploration.