CAJ | 학술논문

挥发性油藏的地层流体由于受到压力、温度和深度的影响，常表现出组分随深度的变化，即组分梯度特征，国内对该类型流体表征研究甚少。首先归纳总结了考虑重力、地温梯度和热扩散效应下的组分梯度理论模型；选取一个典型的存在组分梯度的挥发油藏，模拟计算了在重力和地温梯度双重作用下的原油组分、体积系数和气油比随深度的变化规律；应用该模型中体积系数随深度的变化规律提高了地质储量的计算精度；在油藏数值模拟中应用该组分梯度模型，其气油比和井底压力拟合的精度远高于定组分模型，说明该组分梯度模型能更好地描述该油藏的开发动态特征；该成果可以对油藏开发管理提供重要依据，也可为同类型油藏的研究提供重要的借鉴意义。
휘발성유장적지층류체유우수도압력、온도화심도적영향，상표현출조분수심도적변화，즉조분제도특정，국내대해류형류체표정연구심소。수선귀납총결료고필중력、지온제도화열확산효응하적조분제도이론모형；선취일개전형적존재조분제도적휘발유장，모의계산료재중력화지온제도쌍중작용하적원유조분、체적계수화기유비수심도적변화규률；응용해모형중체적계수수심도적변화규률제고료지질저량적계산정도；재유장수치모의중응용해조분제도모형，기기유비화정저압력의합적정도원고우정조분모형，설명해조분제도모형능경호지묘술해유장적개발동태특정；해성과가이대유장개발관리제공중요의거，야가위동류형유장적연구제공중요적차감의의。
Under the effect of pressure,temperature and depth,the volatile fluid reservoir shows obviously the reservoir composition change with the well depth,about which little research is done in domestic companies and universities. Firstly,the paper summarizes the theory model of its compositional gradient with consideration of gravity,thermal gradient and thermal diffusion. Under the gravity and thermal gradient model,phase state regression and gradient simulation are finished for all samples. The more reasonable compositional gradient model can be found,which could describe prosperities variation with depth better,such as compositions,GOR,volume factor,etc. Precision of OOIP evaluation is improved by using trend of volume factor with depth. Matching of GOR and bottom-hole pressure is observably better than the fixed compositional model, which shows that the model can describe fluid variation with depth during development. At the same time,the achievement will provide significant evidence for reservoir development and management. What is more,the research method has important reference value for similar fluid or reservoir.