【摘要】 <正>近二十年来,生油岩的热演化理论和方法的研究进展很快,这种方法又称为“热成熟机制”(Thermal Maturation Regime)或“热变机制”(Thermal Evolution Regime).其所用公式都以时间和温度为热变的基本因素,与温度为指数关系,与时间为线性关系.国外称其为Time Temperature Index缩写TTI,故常称为“TTI”方法.人们在油气勘探活动中早就发现,油与气的出现与其埋藏深度有着密切关系,随着深度的增加,开始生成湿气,而后是油,到一定的深度都变成干气.1965年菲利浦(G.T.Philippi)通过对美国洛杉机和文图拉两盆地的研究,认为温度是影响油气成熟的主要因素,埋藏深度是造成地温升高的一个条件.更多还原

【Abstract】 The study of thermal evolution of the source rock has been developing repidly in recent years. It uses the principle of chemical kinetics for studing the main factors (time and temperature) of thermal maturation of organism, as a result the relation between them was obtained. This method is referred to as the Thermal Maturation Regime or Thermal Evolution Regime, and called TTI for short. This paper described briefly the basic principle of the thermalevolution of the source rock, ane several commonly used methods --ConnanMethod, Lopatin-Waples Method, and E. A. Fitting Method are derived from this principle. The calculation equation of Connan Method iswhere ±△T is the correction, it equals the difference between the observed value in the well and the calculated value. When the calculated value is greater, it will be minus, otherwise, plus. The calculation equation of Lopatin-Waples Method isThe calculation equation of the E. A. Fitting Method isfitted the E/R= 10091·15496, A= 1.859144×1011 .The above-mentioned three methods are used and correlated for the Pearl River Mouth Basin. There are not obvious erosions and discontinuities in the stratigraphy of the selected areas, and their TTI values obtained are similar to the values in Tab. II, this suggests that the results of these methods are not much different if the history of these methods are not much different if the history of sedimentation is relatively simple. But in the circumstances much complex as East China Sea, only the E. A. Fitting Method is suitable. Fig 2 reflects the change of TTI in the stratigraphy of strongly eroded and absent.更多还原