CAJ | 학술논문

塔里木盆地和威利斯顿盆地均以古生界海相碳酸盐岩为主要勘探层系。基于对构造沉积背景和油气成藏条件的对比分析，探讨了两个盆地古生界海相碳酸盐岩油气成藏的异同。威利斯顿盆地所处的北美板块规模较大，构造相对稳定，沉积主要受海平面升降的控制。塔里木盆地所处的塔里木板块规模较小，构造变动强烈，沉积受构造运动影响较大。威利斯顿盆地发育了高丰度的烃源岩、良好的孔隙型储层和蒸发岩盖层。而塔里木盆地古生界发育高-过成熟度烃源岩、岩溶型和白云岩储层及泥岩和蒸发岩主导的盖层。二者均发育有多种类型圈闭的古隆起，可作为盆地油气富集的主要区带。威利斯顿盆地发育的多套蒸发岩盖层使得含油气系统概念在该盆地能够得到有效的应用，而油气成藏体系则可以更有效地指导以塔里木盆地为代表的多源、多灶和多成藏期盆地的油气勘探。白云岩-蒸发岩构成了威利斯顿盆地重要的储-盖组合类型。以此类比，塔里木盆地巴楚和塔中地区的中、下寒武统白云岩-中寒武统膏盐岩储-盖组合是未来勘探的有利目标区。
탑리목분지화위리사돈분지균이고생계해상탄산염암위주요감탐층계。기우대구조침적배경화유기성장조건적대비분석，탐토료량개분지고생계해상탄산염암유기성장적이동。위리사돈분지소처적북미판괴규모교대，구조상대은정，침적주요수해평면승강적공제。탑리목분지소처적탑리목판괴규모교소，구조변동강렬，침적수구조운동영향교대。위리사돈분지발육료고봉도적경원암、량호적공극형저층화증발암개층。이탑리목분지고생계발육고-과성숙도경원암、암용형화백운암저층급니암화증발암주도적개층。이자균발육유다충류형권폐적고륭기，가작위분지유기부집적주요구대。위리사돈분지발육적다투증발암개층사득함유기계통개념재해분지능구득도유효적응용，이유기성장체계칙가이경유효지지도이탑리목분지위대표적다원、다조화다성장기분지적유기감탐。백운암-증발암구성료위리사돈분지중요적저-개조합류형。이차류비，탑리목분지파초화탑중지구적중、하한무통백운암-중한무통고염암저-개조합시미래감탐적유리목표구。
The Paleozoic marine carbonates are the main exploration targets in both Tarim and Williston basins .Based on a comparative analysis of both tectonic-depositional setting and conditions for the formation of hydrocarbon accumula-tions,this paper discusses the similarities and differences of hydrocarbon accumulation in the Paleozoic marine carbonates of the two basins .Williston Basin locates within the large North America Plate with relatively stable tectonic setting .The sedimentation within the basin was mainly controlled by eustasy .In contrast ,Tarim Basin locates in the much smaller Tar-im Plate and experienced frequent and intensive structural deformations .As a result,the sedimentation within the basin was mainly controlled by the tectonic movements .Williston Basin has high-TOC effective source rocks ,good porous-type reservoirs and evaporite cap rocks ,while Tarim Basin has high-mature to overmature source rocks ,karst and dolomite res-ervoirs,and mudstone and evaporite cap rocks .Different kinds of traps are developed on the paleo-highs in both basins , which constitute the main carbonate play fairways .Williston Basin has multiple evaporite sequences ,which makes it pos-sible to effectively apply the petroleum system concept to the basin .In comparison ,the hydrocarbon accumulation system concept can provide effective guidance for the hydrocarbon exploration in basins such as Tarim Basin featuring in multiple source rocks ,multiple kitchens and multiple episodes of hydrocarbon charging .The favorable reservoir-seal assemblage in Williston Basin is dolomite reservoir and evaporite seal .The comparative analyses indicate that the favorable carbonate play fairways are the areas with the assemblage of the Lower-Middle Cambrian dolomite reservoirs and the Middle Cam-brian evaporite seals in the Bachu and Tazhong areas .