大庆长垣A区B组二类油层开发地质特征及开发指标预测

发布时间：2018-03-10 12:18

本文选题：地质特征　切入点：剩余油分布　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：A区位于大庆长垣萨中油田东部,1960年投入开发,先后经过一、二、三次加密调整和葡一组主力油层聚合物驱井网投用。2013年6月,该区新井陆续投产,开始进行空白水驱,截止到2014年底,采出程度达到49.61%。本文选取A区为研究对象,以B组为研究重点,在充分了解A区地质特征的基础上,搞清储层特点、内部流体性质、地质储量和开采程度;进而,进行精细油藏描述,认清油藏发育状况及剩余油分布情况;最后通过数值模拟法、童氏图版法、新井测井资料等综合方法预测开发指标,对开发情况进行有效评价和阶段验证。通过分析表明,A区B组二类油层地质储量为1399.64×104t;精细油藏描述,分析18个沉积单元的沉积特征,主要归纳为2个沉积亚相,4种沉积类型,特征一一进行总结;利用测井资料、新井投产资料分析剩余油情况,通过数值模拟研究搞清剩余油分布特征。综合以上表明,经过五十多年的注水开发,A区二类油层全部见水,中、高水淹厚度比例90%以上,剩余油分布零散,平面上主要以注采关系不完善、井间未动用为主;纵向上多富集在厚油层顶部。通过相控建模预测,A区二类油层水驱最终采收率为45.3%,通过进行三元复合驱油后,可以提高采收率16.4%,累计增油229.54×104t,油层最终采收率61.7%。截止到2016年4月,聚驱阶段采出程度3.66%,平均单井增油1257t,含水下降7.2个百分点,为A区后期开发提供了理论依据。
[Abstract]:Area A is located in the eastern part of Daqing Changyuan Sazhong Oilfield. It was put into development in 1960, after one, two, three times of infilling adjustment and putting into use of the polymer flooding network of a group of main reservoirs in Portugal. In June 2013, new wells in the area were put into production one after another, and blank water flooding began. By end of 2014, the degree of recovery has reached 49.61. In this paper, A area is selected as the research object, group B as the research focus, on the basis of fully understanding the geological characteristics of area A, the reservoir characteristics, internal fluid properties, geological reserves and exploitation degree are clear. Then, fine reservoir description is carried out to recognize the reservoir development status and remaining oil distribution. Finally, the development index is predicted by comprehensive methods such as numerical simulation method, Tong's chart method, new well logging data, etc. The effective evaluation and stage verification of the development are carried out. The results show that the geological reserves of the second class reservoir of Group B in area A are 1399.64 脳 104t.The fine reservoir description and the analysis of sedimentary characteristics of 18 sedimentary units are mainly divided into 2 sedimentary subfacies and 4 sedimentary types. The characteristics are summarized one by one; the remaining oil situation is analyzed by using logging data and production data of new wells, and the distribution characteristics of remaining oil are clarified by numerical simulation. The above results show that after more than 50 years of water injection development, all the second class oil reservoirs in area A are waterlogged. The ratio of high water-flooded thickness is more than 90%, the remaining oil distribution is scattered, the relationship between injection and production is not perfect, and the cross-well is mainly unused. Longitudinally, most of them are concentrated on the top of thick reservoir. The final recovery factor of water drive in the second class oil reservoir of area A is predicted to be 45.3 by using phase control modeling. After ASP flooding, the recovery factor can be increased by 16.4T, the cumulative oil recovery is increased by 229.54 脳 104t, and the final recovery factor of reservoir is 61.70.As of April 2016, At the stage of polymer flooding, the recovery degree is 3.66, the average oil increment of single well is 1257 t, and the water cut is decreased by 7.2%, which provides a theoretical basis for the later development of area A.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE34;P618.13

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