摘要
油气运聚系数是指某一地质单元内石油和天然气资源量与生烃量之比,是油气资源评价的关键参数。随着近10年来勘探开发程度的逐步提高,积累了更多的刻度区和地质参数,奠定了进一步研究油气运聚系数的基础。对全国14个主要含油气盆地的86个油气刻度区进行解剖,以研究不同类型盆地油气运聚系数与地质参数之间的关系。分析结果表明,不同类型盆地的油气运聚系数均与主要生烃时间、储层百分含量、圈闭面积系数、区域不整合次数4项主控地质参数具有较为显著的相关关系。区域不整合次数对各类型盆地的油气运聚效率的影响始终最大;东部裂谷型盆地圈闭面积系数和储层百分含量的影响程度则较为接近,排在其后;中部克拉通型盆地与西部前陆型盆地分别以圈闭面积系数、主要生烃时间的影响程度次之。据此系统地建立了不同类型盆地石油和天然气的运聚系数统计模型。计算结果表明,统计模型的预测效果较为理想,可用于快速定量预测不同类型低勘探程度盆地的油气运聚系数,具有实用价值。
Oil and gas migration and accumulation coefficient, referring to the ratio of oil and gas resources to hydrocarbon generation in a certain geological unit, is a key parameter for oil and gas resources evaluation. With the increasing improvement of exploration and development level over the last decade, more calibrated units and geological parameters have been accumulated, which lay a foundation for further researches on the oil and gas migration and accumulation coefficients. This paper analyzes the geological parameters of 86 calibrated units in 14 major petroliferous basins in China, studies the relationship between the oil and gas migration and accumulation coefficients and geological parameters in different types of basins. The results indicate that the oil and gas migration and accumulation coefficients in different types of basins are correlated with the primary hydrocarbon generation time, the reservoir thickness ratio, the trap area coefficient and the number of regional unconformities. For all types of basins, the number of regional unconformities has the greatest impact on the oil and gas migration and accumulation efficiency. For rift basins in eastern China, the influence of the trap area coefficient on the oil and gas migration and accumulation efficiency is close to that of the reservoir thickness ratio, lower than the impact of the number of regional unconformities.Besides the influence of the number of regional unconformities, craton basins of central China and foreland basins of western China are secondarily affected by the trap area coefficient and the primary hydrocarbon generation time separately. Based on these conclusions, the statistical models of the oil and gas migration and accumulation coefficients in different types of basins are systematically established. The calculation indicates that the forecast of statistical models is accurate. Accordingly, the statistical models can be used to forecast the oil and gas migration and accumulation coefficients in different types of frontier explor
作者
张蔚
刘成林
张道勇
朱杰
吴晓智
洪唯宇
黎彬
柳永军
Zhang Wei;Liu Chenglin;Zhang Daoyong;Zhu Jie;Wu Xiaozhi;Hong Weiyu;Li Bin;Liu Yongjun(State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum (Beijing);College of Geosciences, China University of Petroleum (Beijing);Strategic Research Center of Oil and Gas Resources,Ministry of Natural Resources;PetroChina Research Institute of Petroleum Exploration & Development)
出处
《中国石油勘探》
CAS
CSCD
北大核心
2019年第1期115-122,共8页
China Petroleum Exploration
基金
"十三五"全国油气资源评价项目"中西部地区中小盆地油气资源评价"(2017YQZYPJ0113)
关键词
油气运聚系数
统计模型
资源评价
低勘探程度盆地
油气运移与聚集
地质参数
回归分析
oil and gas migration and accumulation coefficient
statistical model
resource evaluation
frontier exploration basin
oil and gas migration and accumulation
geological parameters
regression analysis
