摘要
风城油田SAGD技术已进入规模化开发应用,随着生产精细化要求不断深入,油藏模型的精度要求也越来越高。油藏认识的精准性、历史拟合程度的高低直接影响了模型的精度。利用适合SAGD的粗化技术保证了地质模型信息相对完整性,但由于渗透率各向异性仍存在信息缺失等问题,且模型中岩石热物性参数及实验的黏温数据的可靠性没有得到验证,制约了模型精度的进一步提升。利用CMG软件,先后对油藏基础静态参数、岩石及热物性参数、原油黏度3个方面,以历史拟合程度为研究目标进行敏感性分析。研究认为,影响SAGD数值模拟的关键储层参数为净毛比、渗透率、岩石热容量、岩石热传导率、黏温曲线等。在此基础上,建立了一套提高油藏数值模型精度的方法,历史拟合程度达到95%以上。
SAGD technique has be applied in developing Fengcheng Oilfield in large scale. Along with increasing requirement for production refinement,the accuracy requirement for reservoir models are becoming higher and higher. The accuracy of reservoir cognitions and history matching degree directly affect the model accuracy. Coarsening technique that is suitable for SAGD can ensure the relative integrity of the geological model information. Because of some issues( such as lack of complete information on permeability anisotropy,etc.),and the reliability of the thermal physical parameters of rocks in the models,and viscosity-temperature data in the experiments have been verified,to further enhance the accuracy of the models is restricted. Applying CMG software,aiming at improving history matching degree,the sensitivity values of three main types of parameters( basic static parameters of reservoirs,rock and thermal physical parameters,oil viscosity) were successively analyzed. The study results show that the key parameters influencing SAGD numerical simulation are net / gross ratio,permeability,rock heat capacity,rock thermal conductivity,viscosity-temperature curve,etc. On the basis of the above studies,a set of methods for improving model accuracy of reservoir numerical simulation were formed,with history matching degree of more than 95%.
出处
《特种油气藏》
CAS
CSCD
北大核心
2015年第3期38-41,152,共4页
Special Oil & Gas Reservoirs
基金
中国石油天然气股份公司重大科技专项"新疆大庆"课题之五"浅层稠油
超稠油开发技术研究与应用"(2012E-34-05)
关键词
SAGD数值模拟
储层参数
敏感性分析
历史拟合
重37井区
SAGD numerical simulation
reservoir parameter,sensitivity analysis
history matching
Chong 37 well field
