松辽盆地南部致密油源岩下限与分级评价标准

发布时间：2018-01-31 07:13

  本文关键词： 致密油 烃源岩 分级评价 排烃 超压 松辽盆地南部　出处：《石油勘探与开发》2017年03期 　论文类型：期刊论文

【摘要】：以松辽盆地南部为研究区,基于物质平衡法对源岩的排烃强度进行定量评价,利用PetroMod软件的超压模块对源岩内超压进行评价。通过建立源岩排烃强度与残余有机碳含量及超压的关系,根据拐点确定出岩石排烃量2 mg/g、残余有机碳含量0.8%、超压1 MPa为致密油源岩的下限,提出岩石排烃量8 mg/g、残余有机碳含量2.0%、超压7 MPa为致密油优质源岩的界限。据此,将致密油源岩划分为优质源岩(Ⅰ类)、低效源岩(Ⅱ类)、无效源岩(Ⅲ类)。利用致密油源岩的下限及分级评价标准对松辽盆地南部致密油有利区分布范围进行评价,结果显示优质源岩对致密油分布具有显著的控制作用,优质源岩发育区及邻近层位是致密油富集的有利区。图8表2参52
[Abstract]:Taking the southern part of Songliao Basin as the study area, the hydrocarbon expulsion intensity of the source rock was quantitatively evaluated based on the material balance method. The overpressure in the source rock is evaluated by the PetroMod software, and the relationship between the hydrocarbon expulsion intensity and the residual organic carbon content and the overpressure of the source rock is established. According to the inflexion point, the rock hydrocarbon expulsion capacity is determined to be 2 mg / g, the residual organic carbon content is 0.8, the overpressure is 1 MPa as the lower limit of the tight source rock, and the rock hydrocarbon expulsion amount is proposed to be 8 mg/g. The residual organic carbon content is 2.0, and the overpressure of 7 MPa is the boundary of the high quality source rock. According to this, the tight source rock can be divided into high quality source rock (type 鈪，

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