二连盆地格日勒敖都凹陷准宝1井油源对比

Correlation of oil and source in well Zhunbao 1, Gerileaodou Sag, Erlian Basin

魏分粮 欧阳睿 肖斌 钟宁宁 罗情勇 韩辉 齐琳 付晓宁 张毅

Wei Fenliang Ouyang Rui Xiao Bin Zhong Ningning Luo Qingyong Han Hui Qi Lin Fu Xiaoning Zhang Yi

中国石化中原油田分公司内蒙勘探开发指挥部, 河南, 濮阳, 457001 2. 中国石化中原油田分公司物探研究院, 河南, 濮阳, 457001 3. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京, 102249 4. 中国石化中原油田分公司采油四厂, 河南, 濮阳, 457001

Exploration & Development Headquarter of Inner Mongolia, SINOPEC Zhongyuan Oilfield Company, Puyang, Henan 457001, China 2. Geophysical Research Institute, SINOPEC Zhongyuan Oilfield Company, Puyang, Henan 457001, China 3. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China 4. No.4 Oil Production Plant, SINOPEC Zhongyuan Oilfield Company, Puyang, Henan 457001, China

二连盆地格日勒敖都凹陷准宝1井侏罗系阿拉坦合力群烃源岩的Ro分布范围为0.58%～0.67%,平均值为0.63%,Tmax平均值大于435℃,处于低熟—成熟生烃演化阶段;Pr/Ph分布范围为0.39～5.24,平均值为1.62,表明其沉积环境为偏还原;伽马蜡烷/C30αβ藿烷分布范围为0.07～1.45,平均值为0.37,表明其沉积于淡水—微咸水的湖沼;C29/C27ααα20R甾烷比值均大于1,表明烃源岩生源既有低等生物贡献又有高等植物贡献,且高等植物贡献占优势。通过烃源岩和原油的地球化学特征对比,表明准宝1井原油来自阿拉坦合力群烃源岩。阿拉坦合力群是二连盆地有利的油气勘探方向。

Source rocks of the Alatanheli Group of Jurassic in well Zhunbao 1 in the Gerileaodou Sag of the Erlian Basin have been studied.Ro ranges from 0.58% to 0.67% with the average value of 0.63% and Tmax is over 435℃ in average,indicating low-mature and mature stages for hydrocarbon generation.Pr/Ph ranges from 0.39 to 5.24 and the average value is 1.62,indicating reducing environment.Gammacerane/C30αβ hopane ranges from 0.07 to 1.45 with the average value of 0.37,proving that the source rocks deposited in lacustrine bog of sweet and brackish water.C29/C27ααα20R sterane is over 1,proving that the source rocks originated from both lower creature and advanced plant,and the advanced plant contributed more than the lower creature.Comparisons of geochemical features have been made between source rock and crude oil,indicating that the crude oil in well Zhunbao 1 originated from source rocks in the Alatanheli Group.The Alatanheli Group is the key exploration target in the Erlian Basin.

https://doi.org/10.11781/sysydz201201078