Fluid Inclusion Analysis for Constraining the Hydrocarbon Accumulation Periods of the Permian Reservoirs in Northeast Ordos Basin

• Published in: Journal of earth science (Wuhan, China) Vol. 24; no. 4; pp. 589 - 598
• Main Author: 陈刚 李书恒 章辉若 杨甫 丁超 雷盼盼 胡延旭
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2013; Springer Nature B.V
• Subjects: Accumulation; Basins; Biogeosciences; Cenozoic; Constraining; Cretaceous; Earth and Environmental Science; Earth science; Earth Sciences; Fluid dynamics; Fluid inclusions; Geochemistry; Geology; Geotechnical Engineering & Applied Earth Sciences; High temperature; Homogenizing; Hydrocarbons; Mesozoic; Neogene; Permian; Petroleum geology; Petroleum hydrocarbons; Reconstruction; Reservoirs; Rock; Rocks; Sandstone; 东北部; 二叠纪; 体分析; 水库; 油气成藏期; 流体包裹体; 磷灰石裂变径迹; 鄂尔多斯盆地; Permian Basin; China, People's Rep., Ordos Basin; hydrocarbon accumulation; geochronology; apatite fission track; fluid inclusion; Northeast Ordos Basin; Permian reservoir
• ISSN: 1674-487X; 1867-111X
• DOI: 10.1007/s12583-013-0354-x

Geochronology of hydrocarbon accumulation and reconstruction is an important and challenging subject of petroleum geology in multi-cycle superimposed basin. By fluid inclusion （FI） analysis combined with the apatite fission track （AFT） modeling thermal path of the FI host rock, a case study of constraining the hydrocarbon accumulation and reconstruction periods of the Permian reservoirs in Northeast Ordos Basin （OB） has been conducted. The FI homogenization temperatures of the oil-gas-bearing sandstone core-samples from the Lower to Upper Permian reservoirs statistically present two groups with a low and a high temperature peaks in ranges of 90-78 and 125-118 ℃, re- spectively, corresponding to 2-stage primary hydrocarbon accumulations of the Early-Middle Mesozoic. Besides, there exists another group with a medium-high peak temperature of 98 ℃ in the Upper Per- mian reservoirs, corresponding to the hydrocarbon reconstruction and destruction of the Late Meso- zoic to Cenozoic. According to the projected ages of the FI peak temperatures on the AFT thermal path of the FI host rocks, it is further induced that there experienced 3-stage hydrocarbon accumulations in the Permian reservoirs during the Mesozoic to Cenozoic. These are： （1） all the various primary hydro- carbon Permian reservoirs together developed 2-stage accumulations of 162-153 and 140-128 Ma in agreement with the multi-cycle subsidence burial heating process of the basin; （2） the Upper Per- mian reservoirs further experienced 1-stage secondary hydrocarbon accumulation and re- construction at ca. 30 Ma in coincidence with a critical tectonic conversion of the slow to rapid uplifting process from the Late Cretaceous to Neogene.