辽河兴隆台构造带原油类型及分布特征

Type and distribution of crude oil of Xinglongtai structural belt in West Liaohe Depression

刘峰 吕炳全 何万军 张春林

Liu Feng Lu Bingquan He Wanjun Zhang Chunlin

同济大学海洋地质国家重点实验室, 上海 200092; 中国石油新疆油田分公司勘探开发研究院, 新疆克拉玛依 834000; 中国石油勘探开发研究院廊坊分院, 河北廊坊 065007

State Key Laboratory of Marine Geology, Tongji University, Shanghai 20092; Research Institute of Petroleum Exploration and Development, Xinjiang Oilfield Company, CNPC, Karamayi 834000; Langfang Branch of Research Institute of Petroleum Exploration and Development, CNPC, Langfang 065007

对原油地球化学特征进行对比分析, 将辽河西部凹陷兴隆台构造带原油划分成4种类型。各类原油的正构烷烃碳数分布曲线、甾萜类成熟度参数、Pr/Ph等指标有较大差异, 并在该区呈规律分布。总体表现为第三系原油由南至北成熟度参数和Pr/Ph值呈降低的趋势, 正构烷烃碳数从单峰变化为双峰分布;太古宇潜山内幕及潜山表层原油性质相似, 其成熟度明显高于第三系原油。原油分布主要受控于南北洼陷生油层成烃演化差异及与断裂发育时期的相互配置关系。

On the basis of geochemical characteristics of oil samples collected from Xinglongtai structural belt in the west Sag of Liaohe Depression crude oils found in Xinglongtai structural belt were classified into four types.Carbon number distribution curves of normal paraffin hydrocarbons mature parameters of steranes and terpanes, and Pr-to-Ph ratio varied alet and distributied regularly.The maturities and Pr-to-Ph ratio of the Tertiary oils in the structural belt show an decreasing trend from south to north and proportionally the carbon number distribution curves of normal paraffin hydrocarbons change from unimodal distribution model to bimodal distribution model The curde oils from the reservoirs of the inner and surface layer of the buried-hill have similar geochemical characteristics and higher maturity than the Tertiary oils.The relationship between thermal evolution difference of source rocks in peripheral hydrocarbon generation subsags and develpment of faults is mainly responsible for the distribution of crude oil

https://doi.org/10.3969/j.issn.1008-2336.2009.02.003