CAJ | 학술논문

运用当代层序地层学的原理和方法，综合分析了地震、测井、岩心等资料，发现琼东南盆地经历了早期裂陷和晚期坳陷两大发育历程，相应划分出TejasA和TejasB两个超层序组；与盆地非海相、海相过渡相、生长断层、缓坡和被动大陆边缘背景演化阶段相匹配，形成了5个超层序.以不整合及其与之可以对比的整合为三级层序边界，识别出19个层序，含57个体系域、54个以上准层序组、196个以上准层序.在盆地的不同演化阶段，沉积层序的不同点主要在于低水位体系域包含的沉积体系不同.在恢复古地理环境的基础上，提炼出有关沉积层序模式.根据可容纳空间分析，编制了本区海平面升降曲线，发现陵水中期、梅山早期和莺歌海早期三次大的海泛与全球变化完全合拍.在纵向上，海进体系域至密集段生烃潜力最强，空间上以外陆架-大陆坡最好，其次为滨沼或海陆过渡相.指出了陆架坡折附近的低水位楔和斜坡扇是值得注意的隐蔽圈闭勘探目标.
운용당대층서지층학적원리화방법，종합분석료지진、측정、암심등자료，발현경동남분지경력료조기렬함화만기요함량대발육역정，상응화분출TejasA화TejasB량개초층서조；여분지비해상、해상과도상、생장단층、완파화피동대륙변연배경연화계단상필배，형성료5개초층서.이불정합급기여지가이대비적정합위삼급층서변계，식별출19개층서，함57개체계역、54개이상준층서조、196개이상준층서.재분지적불동연화계단，침적층서적불동점주요재우저수위체계역포함적침적체계불동.재회복고지리배경적기출상，제련출유관침적층서모식.근거가용납공간분석，편제료본구해평면승강곡선，발현릉수중기、매산조기화앵가해조기삼차대적해범여전구변화완전합박.재종향상，해진체계역지밀집단생경잠력최강，공간상이외륙가-대륙파최호，기차위빈소혹해륙과도상.지출료륙가파절부근적저수위설화사파선시치득주의적은폐권폐감탐목표.
The principle of and method for the contemporary sequencestratigraphy are both employed to analyze comprehensively the references on seismology, logging, and cores. This comprehensive analysis shows that the Qiongdongnan basin may have experienced two major growth stages: the early rift stage and the late depression stage, corresponding to the two supersequence sets: Tejas A and Tejas B. In addition, five supersequences were formed that corresponded to the five evolutionary stages in the basin: nonmarine facies, marine transitional facies, growth fault, ramp, and passive continental setting. The unconformity and its counterpart, the conformity, both serving as the third-order sequence boundaries are employed to identify 19 sequences containing 57 systems tracts, over 54 parasequence sets and over 196 parasequences. The major differences between different evolutionary stages and between different sedimentary sequences in the basin are both attributed to the different sedimentary system contained in the lowstand systems tract. On the basis of the reconstruction of the paleo-environment settings, have been established the models of depositional sequences. The accomodation analysis is applied to the compilation of the sea-level change curve of the Qiongdongnan basin, resulting in the discovery of the perfect matching between the three major marine floods that occurred in the middle Lingshui, early Meishan and early Yinggehai stages, and the corresponding globe changes. The best potential hydrocarbon resources are located vertically in the section between the marine transgressive systems tract and the condensed section, but laterally between the outer-shelf to the continental slope. The next best potential hydrocarbon resources are located in the littoral-aquamarsh deposits or in the marine-continental transitional facies. This paper suggests that the lowstand wedge and the slope fan near the continental-shelf slope break should serve as the petroleum exploration target of the hidden traps worthy of attention.