摘要
运用石油资源量定量评价的一种新方法——模糊数学法，对塔里木盆地石炭系烃源岩不同沉积有机相的生烃潜力进行评价预测，该方法不同于前人常用的盆地模拟法、趋势面分析法、干酪根降解动力学法等，它是将地质变量作为模糊变量，用模糊数学的原理进行计算。将石炭系烃源岩的厚度、有机质丰度、有机质类型、有机质成熟度及沉积有机相作为模糊变量，计算不同沉积有机相烃源岩生烃潜力。计算结果表明，开阔台地沉积有机相和半闭塞台地沉积有机相生烃潜力最大，蒸发台地沉积有机相和开放泻湖沉积有机相的生烃潜力次之，并根据计算结果，指出塔里木盆地西部石炭系烃源岩发育，在合适的构造条件下最有可能钻遇石炭系自生自储自盖式的大油气藏，同时应重视塔里木盆地东部地区石炭系泥质烃源岩的生烃贡献。
Evaluation and prediction on hydrocarbon generation potentials of various sedime ntary organic facies of carboniferous source rocks in Tarim Basin were carried o ut in this paper by fuzzy mathematics, a new method for quantitative petroleum r esources evaluation. This method is different from the methods of basin mode ling trend surface analysis, kerogen degradation dynamics et al. With this metho d, geological variables are taken as fuzzy variables and calculation is carried out based on the theory of fuzzy mathematics. In this paper, parameters of thick ness, organic matter abundance, organic matter type, organic matter maturation a nd sedimentary organic facies of Carboniferous source rocks were taken as fuzzy variables to calculate hydrocarbon generation potential of source rocks in vario us sedimentary organic facies. The calculation results indicate that hydrocarbon generation potential of open platform and semirestricated platform sedimentar y organic facies are best, which are followed by evaporated platform and open la goon sedimentary organic facies. From the calculation results, the authors put f orward that Carboniferous source rocks are welldeveloped in the western Tarim and possible big oil and gas pools can be found which may be selfgenerated, selfreservored and selfcapped under suitable structures. Meanwhile, we should pay attention to the hydrocarbon generation of Carboniferous argillaceous source rocks in the eastern Tarim.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2000年第1期34-39,共6页
Acta Petrolei Sinica
关键词
石炭系
沉积
有机相
生烃潜力评价
模糊数学
Tarim Basin
Carboniferous
sedim entary organic facies
hydrocarbon generation potential evaluation
fuzzy mathematics
