地表土壤碳酸盐热解与碳同位素实验研究

PYROLYSIS AND C—ISOTOPIC STUDY ON CARBONATES OF SURFACE SOIL

向龙斌 杨占山 吴朋远 祝东涛 陈清棠 刘朋扬 李纯一

Xiang Longbin Yang Zhanshan Wu Pengyuan

中原石油勘探开发研究院, 河南 濮阳 457001

Zongyuan Research Institute of Petroleum Exploration and Development

对取自东濮地区的地表土壤进行不同温度的热解和碳同位素实验,并引用了一口探井的井下化探测量数据。研究结果表明,土壤蚀变碳酸盐(△C)与油气垂直向上迁移没有直接关系,其成因可能是与油气藏形成有关的矿化水向上浸染所致。这种矿化水的作用造成地表土壤酸碱度的"蚀变",从而指示地下油气藏的存在。

The surface soil sampled from Dongpu area is pyrolysed at different temperatures and isotopically analysed by C-isotopic method,and correlated with the underground geochem-ical measurements from an exploratory well. The results show that altered carbonate of soil(△C) does not directly related to vertically upward migration of hydrocardons,but to upward dissemination of mineralized water associated with the formation of hydrocarbon pools. Such a process is the cause for "alteration" of pH value of soil,therefore it may indicate the existence of hydrocarbon accumulation.

https://doi.org/10.11781/sysydz199303304