| 轮南低凸起气洗作用响应及定量评价 |
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| 引用本文： | 吴楠,蔡忠贤,杨海军,陈建渝,刘显凤,顾乔元.轮南低凸起气洗作用响应及定量评价[J].地球科学,2009,34(3). |
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| 作者姓名： | 吴楠 蔡忠贤 杨海军 陈建渝 刘显凤 顾乔元 |
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| 作者单位： | 吴楠,蔡忠贤,陈建渝,刘显凤,WU Nan,CAI Zhong-xian,CHEN Jian-yu,LIU Xian-feng(中国地质大学资源学院,湖北武汉,430047;湖北省油气勘探开发理论与技术实验室,湖北武汉,430074);杨海军,顾乔元,YANG Hai-jun,GU Qiao-yuan(中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒,841000)
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 自喜山期,过量干气自东向西对轮南低凸起原始油藏的大规模侵入、冲刷,诱发本区持续性气洗分馏作用的发生.在各组分气液溶解平衡的格架下,气洗作用将导致残余油中正构烷烃的大量损失以及次生凝析气藏的形成.地球化学研究表明,残余油与凝析油中轻烃组分((C6-C8)的变化趋势具有典型的气洗分馏特征.同时,基于气洗作用模型,通过对各层系原油正构烷烃相对蒸发量(Q)的计算,定量描述了轮南地区气洗作用的强度.计算结果显示,奥陶系的油气藏曾遭受强烈的气洗作用,原油中正构烷烃的相对蒸发量由东向西表现出依次递减的特征.其中,轮古东地区Q值高达97%;位于轮南低凸起中部的轮古2井以及轮古18井地区,正构烷烃相对蒸发量较小(Q=20%～76%);而在更加靠近西部的轮古17及轮古100井,其原油中正构烷烃分布正常(Q=0),并未发生气洗分馏作用.另一方面,石炭系以及三叠系的油气藏均表现出未遭受气洗作用的特征,证实了喜山期大量干气的优势运移通道被限制于海西早期运动所形成的奥陶系岩溶缝洞体系中的事实.因此,奥陶系,尤其是位于临近气源区的轮古东地区,是轮南地区气藏的有利靶区.
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| 关 键 词： | 气洗作用 正构烷烃相对蒸发量 轮南低凸起 蒸发分馏作用 定量化 |
Quantitative Evaluation and the Geochemical Responses of Gas Washing in Lunnan Petroleum Province |
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| WU Nan,CAI Zhong-xian,YANG Hai-jun,CHEN Jian-yu,LIU Xian-feng,GU Qiao-yuan .Faculty of Earth Resources,China University of Geosciences,Wuhan ,China .Key Laboratory of Theory , Technology of Petroleum Exploration , Development,China .Research Institute of Exploration , Development,PetroChina Tarim Corporation,Korla ,China.Quantitative Evaluation and the Geochemical Responses of Gas Washing in Lunnan Petroleum Province[J].Earth Science-Journal of China University of Geosciences,2009,34(3). |
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| Authors: | WU Nan CAI Zhong-xian YANG Hai-jun CHEN Jian-yu LIU Xian-feng GU Qiao-yuan Faculty of Earth Resources China University of Geosciences Wuhan China Key Laboratory of Theory Technology of Petroleum Exploration Development China Research Institute of Exploration Development PetroChina Tarim Corporation Korla China |
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| Institution: | WU Nan1,2,CAI Zhong-xian1,YANG Hai-jun3,CHEN Jian-yu1,LIU Xian-feng1,GU Qiao-yuan3 1.Faculty of Earth Resources,China University of Geosciences,Wuhan 430074,China 2.Key Laboratory of Theory , Technology of Petroleum Exploration , Development,China 3.Research Institute of Exploration , Development,PetroChina Tarim Corporation,Korla 841000,China |
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| Abstract: | Lunnan hydrocarbon province has recently experienced intensive gas invasion since the Himalayan movement,and some of the oils in the Ordovician reservoir show characteristics of progressive fractionation by gas moving.Based on the framework of the components phase equilibrium,the process of gas washing can deplete the n-alkanes of the oil and produce the subsequent condensates.Geochemistry analysis shows that both the residual oil and the condensates indicate the phase fractionation characteristics on their... |
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| Keywords: | gas washing relative depletion of n-alkanes Lunnan low uplift evaporative fractionation quantification |
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