The controls on the composition of biodegraded oils in the Liuhua11-1 Oilfield, Pearl River Mouth Ba

来源 :Chinese Journal of Geochemistry | 被引量 : 0次 | 上传用户:Monkeysct
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
(1) The geochemical characteristics of extracted oils in three oil columns from the Liuhua11-1 Oilfield in the Pearl River Mouth Basin of South China Sea were analyzed in detail. The results show that the oil of Liuhua 11-1 Oilfield is generated from a single source rock, and belongs to maturate oil and their maturities have little difference.(2) The characteristics of saturated hydrocarbon gas chromatography,bulk composition, concentrations of biomarkers and gas chromatography–mass spectrometry of saturated hydrocarbon indicate that all samples studied were biodegraded, and the maximal level of biodegradation is less than PM level 6.(3) Bulk composition and the degree of biodegradation presented excellent gradient variations in the oil columns, and the highest degradation rates occurred at or near the oil–water contact(OWC). The key biomarkers of steranes and terpanes and maturity parameters of saturated hydrocarbon were not affected by degradation, which means that they are stable in slight to moderately biodegraded oils. Across the oilfield, the degree of biodegradation of LH11-1-3 was higher than that of LH11-1-1A and LH 11-1-4 in general.(4) We infer that the strong hydrodynamic conditions(tectonic control) and high reservoir temperatures(50–65 °C) are the primary controllers of the degree of oil biodegradation in the Liuhua 11-1 Oilfield and the late hydrocarbon accumulation may also have an important effect. The bulk composition and degree of biodegradation with excellent gradient variations in the oil columns were obviously controlled by the vertical distance from its in situ place to OWC. The highest supply of nutrient at the OWC results in high abundance of microorganisms and the highest degradation rate. And the lateral variation in level of biodegradation across the oil reservoir may be mainly control by the salinity of bottom water, the supply of nutrient and the energy of the bottom water. (1) The geochemical characteristics of extracted oils in three oil columns from the Liuhua 11-1 Oilfield in the Pearl River Mouth Basin of South China Sea were analyzed in detail. The results show that the oil of Liuhua 11-1 Oilfield is generated from a single source rock, and belongs to maturate oil and their maturities have little difference. (2) The characteristics of saturated hydrocarbon gas chromatography, bulk composition, concentrations of biomarkers and gas chromatography-mass spectrometry of saturated hydrocarbon indicate that all samples studied were biodegraded, and the maximal level of biodegradation is less than PM level 6. (3) Bulk composition and the degree of biodegradation presented excellent gradient variations in the oil columns, and the highest degradation rate occurred at or near the oil-water contact (OWC). The key biomarkers of steranes and terpanes and maturity parameters of saturated hydrocarbons were not affected by degradation, which means that they are stabl Across the oilfield, the degree of biodegradation of LH11-1-3 was higher than that of LH11-1-1A and LH 11-1-4 in general. (4) We infer that the strong hydrodynamic conditions (tectonic control) and high reservoir temperatures (50-65 ° C) are the primary controllers of the degree of oil biodegradation in the Liuhua 11-1 Oilfield and the late hydrocarbon accumulation may also have an important effect. degree of biodegradation with excellent gradient variations in the oil columns were obviously controlled by the vertical distance from its in situ place to OWC. The highest supply of nutrient at the OWC results in high abundance of microorganisms and the highest degradation rate. And the lateral variation in level of biodegradation across the oil reservoir may be mainly control by the salinity of bottom water, the supply of nutrient and the energy of the bottom water.
其他文献
上海市历史博物馆最近收藏了一份1856年签发、编号为No.45006(彩图8)的英国丽如银行发行的股票,这份股票是在2006年北京某秋季拍卖会上拍到的。丽如银行是公认的进入中国和上
在这个世界上,没有什么比人的生命更宝贵,没有什么比人的健康更需要呵护.生命健康权,是每一个人最基本的权利,生命健康问题也是人最现实、最关心、最直接的利益.rn当前,构建
党的十九大召开以来,各地政府以及农业部门越发重视现代化农业的建设与发展.相关部门提出以“新时代社会主义理论体系”为主要指导思想,进一步促进现代化农业的建设与发展.现
如何正确的使用车辆灯光?有很多司机可能会嗤之以鼻。但是,不要小看汽车灯光的使用,有时候能够决定别人的生死。
总有人说,孩子都是债。我倒觉得,女儿是爸爸前世的情人,儿子是妈妈今生的念想,因为有了儿子,我的人生才会在缺憾中淡定而安然。 ——李勤勤    从《笑傲江湖》里的恒山派掌门,到《京华烟云》里的牛太太,再到《大宅门》里“这事不赖我”的白家二媳妇、《我的丑娘》里的梅大姐,在当了20多年的“金牌绿叶”后,李勤勤以精湛的表演在娱乐圈找准了自己的位置。2011年10月,电视剧《当婆婆遇到妈
在教育的这亩方塘中我已经默默耕耘了五年,我深知“随风潜入夜,润物细无声”的效用,我用爱心、细心、耐心的杠杆翘起了一个又一个顽石,让我记忆最深刻是他——黑熊般一身粗肉
期刊
[教学目标]rn1.学生能够情绪饱满地、准确地演唱歌曲《小巴郎,童年的太阳》,表现歌曲活泼自豪的情绪.rn2.学习用手鼓的典型节奏,用铃鼓代替手鼓为歌曲伴奏,进一步感受歌曲的
期刊
今天,太阳高照,我们在客厅里聊天,聊得正高兴时,妈妈站起来,从柜子里拿出了一袋核桃,说:“我们来剥(bāo)核桃吧!”我和哥哥听了,高兴得差点把天花板掀掉。
全国新闻战线正在火热开展的“走基层、转作风、改文风”活动,既是牢固树立马克思主义新闻观,开展三项教育活动,贴近实际、贴近生活、贴近群众的切实抓手,也是北京晚报自身发
炎热的夜晚,往往正是蚊虫肆虐的时候。蚊虫叮咬,一方面会严重干扰人的睡眠,让人难以入睡,另一方面还会传播疾病,给人的健康带来不良影响。很多人怕蚊虫叮咬,便依靠整夜点蚊香来驱赶蚊虫,以获得一个安稳觉。整夜点蚊香,虽然在驱蚊方面有着较好的效果,然而,医学专家却提醒,整夜点蚊香睡觉,会给人的健康带来较大的损害。  蚊香的主要成分是具有杀虫作用的药剂,其中含有苯、苯酚和二甲苯等物质,这些物质都有一定毒性。