黄骅坳陷中北区沙三段烃源岩热压模拟实验及其压力的影响

SOURCE ROCKS HEAT-PRESS SIMULATION EXPERIMENT AND ITS INFLUENCE WITH PRESSURE IN THE MEMBER 3 OF THE SHAHEJIE FORMATION, MIDDLE-NORTH AREA OF HUANGHUA DEPRESSION

李延钧 陈义才 张艳云 廖前进 孙晓明

Li Yanjun Chen Yicai Zhang Yanyun Liao Qianjin Sun Xiaoming

西南石油学院 成都 610500 2. 成都理工大学, 成都 610059 3. 中国石油大港 油田分公司, 天津 300283

South-West Petroleum Institute, Chengdu, Sichuan 610500, China 2. Chengdu Science and Engineering University, Chengdu, Sichuan 610059, China 3. Dagang Oil field Branch, CNPC, Tienjin 300283, China

热压模拟实验是研究烃源岩生烃能力最直接的方法。该文分别选取黄骅坳陷中北区板桥、歧口和北塘凹陷第三系沙三段烃源岩样品进行热压模拟实验,分析和对比了生烃产物、油气产率和相态特征。结果表明黄骅中北区沙三段烃源岩的生烃能力都较高,最大总产烃率可达300~350kg/t。板桥凹陷深层烃源岩在成熟—高成熟阶段主要生成凝析油气,北塘凹陷和歧口凹陷深层烃源岩在成熟阶段主要生油,高成熟阶段主要生成凝析油气。同时,通过实验压力的改变探讨了压力对生烃产率、生烃产物组成和相态的影响,阐明超压作用改变了传统的生烃模式,使油相出现和存在的深度、范围增大,扩大了找油领域。

The heat-press simulation experiment is the most direct method for studying the ability of hydrocarbon-generating in source rock.This paper selects by examinations respectively three rock samples in the Member 3 of the Shahejie Formation of Banqiao,Qikou and Beitang Depression to do the heat-press simulation experiments,analyzing with contrasted to the hydrocarbon outcomes,the oil-gas production rate and its phase characteristic.The result shows that three source rocks are all the highly ability of hydrocarbon-generating,the biggest hydrocarbon-generating rate can amount to 300～350kg/t.The source rock in deep of Banqiao Depression mainly produces condensation oil-gas during mature-high mature stage,while the source rock in deep of Qikou and Beitang Depression pruduces oil during mature stage,and produces condensation oil-gas during high mature stage.On the experiment,by changing the experiment pressure to study its influence on hydrocarbon-generating rate and outcome constitution and hydrocarbon-generating phase.In the end,the author clarified that superpressure changes the traditional hydrocarbon-generating mode,enlarging depth and scope of existing oil phase,and extending frontier areas to look for oil.

四川省重点学科建设项目(SZD0414)。

https://doi.org/10.11781/sysydz200504419