SSX油藏注烃气提高采收率数值模拟预测

发布时间：2018-04-22 16:15

本文选题：油藏地质建模 + 注烃气驱　；参考：《西南石油大学》2017年硕士论文

【摘要】：随着21世纪能源问题的日益凸显,如何能够降低成本并且有效的提高油田的采收率成为石油工作者关注的焦点。在现有的提高采收率技术中,注气驱已经发展成为其中最重要提高采收率手段之一。它已经被推广进行工业化并且广泛应用于国内外各大油田。为油田的增产提供了巨大的贡献。我国目前新发现的油田主要为低渗油藏。事实证明,注气技术已经被成功的实践于各种低渗透油藏,并且取得了很好的效果。随着注气提高采收率机理的不断发展,可供选择的注入气体的种类也在不断增多。本文受《鄯善油田注气提高采收率技术研究》项目资助开展研究,根据SSX油藏的实际情况,选择注烃气作为驱替研究其提高采收率效果。油气藏数值模拟技术是一种重要的研究提高采收率方法。而油藏地质建模又是油藏数值模拟的基础。随着该技术的不断发展,要求地质建模和数值模拟一体化发展,即通过建立该油藏的数据库,规范在建模和数模过程当中的数据使用标准,从而使研究该油藏提高采收率的过程一体化,提高工作效率。我们在油藏的实际地质情况的基础之上选用petrel软件对该油藏进行了三维地质建模,核算了实际的地质储量为1525.4×104t。分析了各个小层的储量分布情况,S2小层储量的丰度最大。在该油藏的地质模型的基础之上,选用了 Eclipse的组分模型,进行了数值模拟研究。开展了 PVT的拟合、细管实验的拟合、长岩心驱替实验的拟合、历史拟合研究。选择了注气范围,其原始原油地质储量398.56×104t。注烃气工程参数优化的结果是:①建议选择上部层位(S1+S2)连续注烃气;②建议选择平均单井注气量为2.00× 104m3/d进行连续注烃气;③建议选择地层压力水平保持在24MPa左右进行连续注烃气;④建议控制"气窜气油比"应选择3500m3/m3;⑤建议选择交替周期长度为6月:6月进行烃气/水交替注入;⑥建议选择段塞数目为12个进行烃气/水交替注气方式;⑦建议选择段塞尺寸比为1:1进行烃气/水交替注入。
[Abstract]:With the increasingly prominent energy problem in the 21st century, how to reduce the cost and effectively improve the oil recovery has become the focus of petroleum workers. Gas injection flooding has become one of the most important means to improve oil recovery. It has been popularized for industrialization and widely used in various oil fields at home and abroad. It has made a great contribution to the production increase of the oil field. At present, the newly discovered oil fields in China are mainly low permeability reservoirs. It has been proved that gas injection technology has been successfully applied in various low permeability reservoirs and has achieved good results. With the development of the mechanism of enhanced recovery by gas injection, the kinds of injectable gases available for selection are increasing. According to the actual situation of SSX reservoir, the hydrocarbon injection gas is selected as the displacement to study the effect of improving oil recovery. Numerical simulation of oil and gas reservoir is an important method to improve oil recovery. Reservoir geological modeling is the foundation of reservoir numerical simulation. With the continuous development of this technology, the integration of geological modeling and numerical simulation is required, that is, by establishing the database of the reservoir, the standard for the use of data in the process of modeling and mathematical modeling is standardized. Thus, the process of improving oil recovery in this reservoir is integrated and the working efficiency is improved. On the basis of the actual geological conditions of the reservoir, we selected petrel software to carry out 3D geological modeling of the reservoir, and calculated the actual geological reserves of 1525.4 脳 10 ~ (4) t. The reserve distribution of each layer is analyzed. Based on the geological model of the reservoir, the component model of Eclipse is selected and the numerical simulation is carried out. The PVT fitting, the pipe experiment fitting, the long core displacement experiment fitting and the historical fitting research are carried out. The range of gas injection is selected, and the original crude oil geological reserves are 398.56 脳 10 ~ 4 t. The result of optimization of hydrocarbon-injection engineering parameters is that the upper layer is suggested to be selected as S _ 1 S _ 2) continuous hydrocarbon injection gas should be selected for continuous hydrocarbon injection with an average single well gas injection rate of 2.00 脳 104m3/d. (3) it is suggested to select the formation pressure level about 24MPa for continuous hydrocarbon injection / gas injection and to control the "gas channeling gas / oil ratio". It is suggested that the alternative cycle length of 3500m3 / m3 / m3 should be chosen as June: hydrocarbon gas / water injection should be carried out alternately in June; (6) it is suggested that the number of slug should be 12 for hydrocarbon gas / water alternated gas injection. 7. It is suggested to select the slug size ratio of 1:1 for hydrocarbon gas / water alternant injection.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.7

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