普光地区须家河组烃源岩地球物理预测

Geophysical prediction of Xujiahe Formation source rock in Puguang Area

李松峰 2 毕建霞² 曾正清² 王生朗³ 贺艳梅²

中国石化中原油田分公司博士后工作站，河南 郑州 450000 中国石化中原油田分公司勘探开发研究院，河南 郑州 450000 中国石化中原油田分公司勘探事业部，河南 濮阳 457001

Postdoctoral Research Workstation, Zhongyuan Oilfield Company, SINOPEC, Zhengzhou 450000, China Research Institute of Exploration and Development, Zhongyuan Oilfield Company, SINOPEC, Zhengzhou 450000, China Exploration department, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China

烃源岩评价在油气成藏和资源潜力研究中均起着关键性作用，烃源岩地球物理预测能够有效地定量评价烃源岩。普光地区因可用钻井较少，难以对陆相须家河组烃源岩总有机碳质量分数（TOC）和厚度进行定量评价。文中基于烃源岩TOC体定量预测技术资料，对普光地区须家河组烃源岩的TOC和厚度进行地球物理预测。研究结果表明：须家河组主要为中等烃源岩，TOC值大多为0.60%～1.50%，与实测TOC数据比较吻合；烃源岩总有机碳主要以条带状分布，且成层性特征比较明显；须三、须五段的烃源岩在普光东南部及西北部等局部地区的TOC比较高，为好的烃源岩；须三段的有效烃源岩厚度主要为20～30 m，须五段主要为30～40 m。

The evaluation of source rock plays a key role in the research of hydrocarbon accumulation and resource potential, and geophysical prediction of source rock can evaluate the source rock quantitatively and effectively. Because of less available drilling in the Puguang Area, the quantitative evaluation of the total organic carbon (TOC) and thickness of the source rock is difficult. The TOC and thickness of the Xujiahe Formation source rock are geophysical predicted by quantitative prediction technology of TOC volume in the Puguang Area in this paper. The research results show that the Xujiahe Formation is mainly a fair source rock with TOC values ranged from 0.60% to 1.50%, which is in a good agreement with the experimental TOC data. The distribution of TOC  of the source rock is mainly in the banded structure, which shows the characteristics of layering obviously. The TOC of the rocks from the third and fifth Member of Xujiahe Formation are higher in the southeast and northwest of the Puguang Area, which shows good source rocks. The thickness of the effective source rock is mainly from 20 m to 30 m in the third Member, and 30 m to 40 m in the fifth Member.

10.6056/dkyqt201506006