摘要
为建立准噶尔盆地中部地区侏罗系三工河组沉积模式,运用古生物资料统计、古构造恢复、岩心及野外露头观察、粒度及测井曲线分析等手段,对准中地区侏罗系三工河组大型三角洲发育背景、沉积特征、微相展布等进行了研究。结果表明:准噶尔盆地三工河组沉积期具有盆大、水浅、坡缓、物源充足的沉积背景;三角洲具有前缘相带为主,水下分支河道微相发育,横向分布广泛,纵向多期次叠加,少见河口坝沉积的特征,属于典型的浅水三角洲沉积模式。并在此基础上对成藏条件进行了探讨,认为研究区三工河组二段发育良好的储盖组合、有效的运移通道和优质的烃源岩,具有广阔的勘探前景。
In order to establish the sedimentary patterns of the Jurassic Sangonghe Formation in the central Junggar Basin, paleontological data statistics, paleostructure restoration, core test, field outcrop observation, particle size and logging curve analysis and other means were used to study the development setting, sedimentary features and microfacies distribution of the large-scale delta. Result indicates that the sedimentary period of the Jurassic Sangonghe Formation is featured by large-scale basin, shallow water, gentle slope and sufficient provenance. The delta is dominated by the frontal facies with well-developed underwater distributary channel subfacies and rate mouth bar, which is characterized by extensive lateral distribution and multi-stage superimposition in the longitudinal direction. It is considered as a typical shallow-water delta sedimentary pattern. The corresponding hydrocarbon accumulation conditions were further discussed based on this understanding. It is believed that the well-developed reservoir-caprock combination, effective migration channel and high-quality source-rock in the second member of the Sangonghe Formation shows a broad prospects for hydrocarbon exploration.
作者
郑胜
Zheng Sheng(SINOPEC Shengli Oilfield Branch Company, Dongying, Shandong 257000, China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2019年第1期87-93,共7页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"准噶尔盆地碎屑岩层系油气富集规律与勘探评价"(2016ZX05002-002)
关键词
浅水三角洲
沉积特征
成藏条件
三工河组
准噶尔盆地
shallow-water delta
sedimentary feature
hydrocarbon accumulation condition
Sangonghe Formation
Junggar Basin
