摘要
流体组分、产能分布、压力系数、凝析油轻烃等资料均表明千米桥潜山凝析气藏具有显著的流体非均质性。研究认为控制流体非均质性的主要因素有:①双向供烃:天然气碳同位素分析成果表明,潜山北侧凝析油气主要来源于板桥凹陷,南侧天然气主要来自歧口凹陷;②多期成藏:依据流体包裹体镜下观察、岩相学分析及均一温度测试,推测千米桥潜山有三期油气运移,进而根据流体地化特征和充注方向的差别,细化为四幕油气成藏过程;③总体成藏期晚:不同井、不同期次油气运移深度和运移时期的计算结果表明,其成藏期主要在新近纪以后,直到现代;④潜山断裂发育、储层非均质性强。上述因素使产自不同来源不同时期的流体在气藏内未达到充分混合,是形成流体非均质的主要原因。
According to the data on fluid component, productivity distribution, pressure coefficient and condensate light hydrocarbon, it is shown that Qianmiqiao buried hill condensate gas reservoir is of obvious fluid heterogeneity. Through investigation, it was considered that the main factors of controlling fluid heterogeneity include 1 two hydrocarbon sources: in light of gas carbon isotope analysis results, the condensate gas in northern side of the buried hill mainly came from Banqiao Seg and the natural gas in southern side from Oikou Seg; 2 multistage reservoiring: in terms of the microscopic examination, petrographical analysis and homogenization temperature test of fluid inclusions, it was inferred that there were three-stage hydrocarbon migrations in Qianmiqiao buried hill, then, the reservoiring process were subdivided into four episodes according to the fluid geochemical characteristics and the difference in fluid charging direction; 3 belonging in a late reservoiring period in general: through the calculation results of hydrocarbon migration depths and periods in different episode-times and wells, it was shown that the reservoiring period mainly occurred from Post-Upper Tertiary to now; and 4 developed faults and strong reservoir heterogeneity. These factors caused the fluids which came from different segs in different periods to be not fully mixed, which is the principal reason of forming fluid heterogeneity.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2004年第11期34-37,共4页
Natural Gas Industry
关键词
千米桥潜山
凝析气藏
储层非均质性
凝析油
流体
成藏期
天然气
油气运移
期次
岩相学
Carbon
Fluid dynamics
Gas condensates
Geochemistry
Isotopes
Microscopic examination
Petrography
Productivity
Temperature distribution
