油气聚集对石英矿物成岩演化的影响

油气在砂岩储层中的聚集会对石英矿物的胶结作用产生影响。对黄骅坳陷三马探区的石英矿物的包裹体分析以及对开放孔隙中原油抽提物和包裹体中原油的生物标志物进行分析,含油级别较低的油层与水层具有相似的均一化温度分布范围,但富含油层中流体包裹体均一化温度高值分布范围比低级别油层和水层低,包裹体中的烃类组成与开放孔隙中的主要存在成熟度上的不同。分析认为石油的充注不会使石英矿物的胶结作用立刻停止,石英的次生加大作用仍在继续,但胶结作用受到一定的抑制,当石油充注到一定程度后,胶结作用将会停止,后期进入储层的成熟度较高的原油可能未被捕获。

Effects of oil charge on quartz cement

The accumulation of hydrocarbon in sandstone reservoirs affects the cementation of quartzes.In Sanma area of Huanghua depression,through the analysis of the fluid inclusions and the biomarkers of the extract crude oils both in the open space and fluid inclusions in quartz minerals,the distribute of the homogenization temperature in fluid inclusion in acquifer is alike to those in oil trace and oil immersion,and the homogenization temperature in fluid inclusion in oilness is lower than in aequifer and oil trace.The maturity are different in the extract crude oils both in the open space and fluid inclusions in quartz minerals.Due to the filling of hydrocarbons the cementation of quartz minerals don't halt immediately,which is restrained and attenuates gradually,but its secondary enlargement continues.However,the quartzes can't capture much more fluid inclusions and the more maturity hydrocarbon and when crude oil fills enough,the cementation of quartzes will halt.