川东石炭系古油藏—古气藏演化史研究

EVOLUTION HISTORY FROM ANCIENT OIL RESERVOIR TO ANCIENT GAS RESERVOIR IN CARBONIFEROUS, EAST SICHUAN

徐立恒 卢双舫 陈践发

Xu Liheng Lu Shuangfang Chen Jianfa

中国石油天然气股份有限公司, 大庆油田有限责任公司, 勘探开发研究院, 黑龙江, 大庆, 163712 2. 大庆石油学院, 地球科学学院, 黑龙江, 大庆, 163318 3. 中国石油大学, 资源信息学院, 北京, 102249

Research Institute of Exploration and Development, Daqing Oilfield, Petro China, Daqing, Heilongjiang 163712, China 2. Faculty of Earth Science, Daqing Petroleum Institute, Daqing, Heilongjiang 163318, China 3. Faculty of Resource and Information Technology, China University of Petroleum, Beijing 102249, China

以高压热模拟实验为基础,运用生烃动力学方法,计算川东石炭系地层各时期油裂解生气量,探讨古油藏—古气藏演化史;再结合前人测试的石炭系包裹体均一化温度,根据生烃期与注入期相匹配的原理,验证计算结果的可靠性。研究表明:在距今200 Ma(晚三叠世)左右,古油藏开始裂解生气,持续至135 Ma前(早白垩世),这与代表油裂解生气期的Ⅲ期包裹体形成期(187～140 Ma)相匹配。

Bashed on high pressure thermal simulation experiment,using kinetics method,the oil-generation period of Carboniferous in the east Sichuan and the oil-cracking gas quantity are calculated.The evolution history from ancient oil reservoir to ancient gas reservoir is studied.Combined with the Carboniferous inclusions homogenization temperature data of predecessors,according to the matching principle of hydrocarbon-generation period and injection period,the reliability of the calculation result is validated.Studies have indicated that,the ancient oil reservoir begins to crack into gas about 200 Ma ago(the Late Triassic)and continues till 135 Ma ago(the Early Cretaceous),which matches with the formation period(187—140 Ma)of the 3rd period inclusions of oil-cracking gas period.

国家自然科学基金项目(40572079);中国石油化工股份有限公司项目(G0800—06—ZS—138)资助

https://doi.org/10.11781/sysydz201005484