隆鄂尼地区油砂地质及地球化学特征  

GEOLOGICAL AND GEOCHEMICAL CHARACTERISTICS OF THE OIL SANDS IN LONG'ENI AREA

作　　者：宋红莎 张晓宝[1] 曹占元[1] 韩梅梅[3,4] 孙国强[1] SONG Hongsha ZHANG Xiaobao CAO Zhanyuan HAN Meimei SUN Guoqiang(Gansu Key Laboratory of Oil and Gas Resources/Key Laboratory of Oil and Gas Resources of Chinese Academy of Sciences, Lanzhou 730000, China Research Institute of Northwest Biological Environmental Resources, University of Chinese Academy of Sciences, Beijing 100049, China Geological Mechanics Research Institute of Chinese Academy of Geological Sciences, Beijing 100081, China College of Geosciences and Resources, China University of Geosciences, Beijing 100083, China)

机构地区：[1]甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室,甘肃兰州730000 [2]中国科学院大学西北生态环境资源研究院,北京100049 [3]中国地质科学院地质力学研究所,北京100081 [4]中国地质大学地球科学与资源学院,北京100083

出　　处：《大庆石油地质与开发》2017年第1期43-49,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国科学院2012年度"西部之光"人才计划支持项目"马海地区深层构造特征及油气藏成因类型研究"(1308RJZA310);甘肃省重点实验室专项(1309RTSA041)联合资助

摘　　要：通过对隆鄂尼地区油砂的孔隙度及含油率进行统计,研究了隆鄂尼地区油砂地质特征。研究发现,研究区为低孔超低渗储层,与国内典型油砂矿相比含油率较高、油气保存条件好,是油砂勘探开发有利区域。选取12件隆鄂尼地区LK-5井的油砂样品进行色谱—质谱分析,进一步了解研究区地化特征。实验结果表明:隆鄂尼地区油砂受到微生物降解,降解程度属1级;油砂与源岩母质类型相关性好,母质来源于海相有机质,母质类型属混合源,且高等植物的贡献较大;油砂样品的有机质沉积环境为咸水还原海相环境;油砂油达到成熟阶段。研究成果为隆鄂尼地区油砂资源评价提供了科学依据。With the help of the statistics of the porosities and oil-bearing rates of the oil sands in Long＇eni area,the geological characteristics of Long＇eni oil sands were studied. The study achievements discover that for the study areas with low porosity and extra low permeability reservoirs,comparing with the domestic typical oil sands,the rates are pretty higher,and the preserving conditions of the oil and gas are also much better,thus the areas become much favorable regions for the oil-sand exploration and development. Twelve oil sand samples from Well LK-5 in Long＇eni area were selected for the gas chromatography-mass spectrometry analyses,and the geochemical characteristics of the study area were further understood. The experimental results show that the oil sands in this region have been biodegraded and the degraded degree belongs to Level Ⅰ; there are much better correlation between thesource rock types and oil sands,the parent materials are derived from the marine organic matters and their types belong to the mixed sources with the more contribute of the higher plants; the depositional environment of the organic matters is the salt-water reduced marine one; the oil sands have reached the maturity stage. The study achievements have provided the scientific evidences for the evaluation of the oil sand resources in Long＇eni area.

关 键 词：隆鄂尼 油砂 母质类型 沉积环境 成熟度 

分 类 号：TE122.1[石油与天然气工程—油气勘探]