BMN低渗透油藏合理注采井网研究

发布时间：2018-11-21 12:44

【摘要】：随着我国常规油藏的开发步入中后期以及油藏开发技术的不断提高,低渗透、超低渗透油藏的勘探和开发已经成为中国石油工业可持续发展的重要保障。但是开发时存在开发难、成本高等问题,因此开发低渗透油藏技术显得更为重要。 BMN区属于典型的岩性油气藏,平均渗透率为1.34mD,本文以长81层段为研究的目的层段,以石油地质学、油藏开发技术等为理论基础,结合该区块的现场资料、地质建模以及数值模拟对研究区块进行启动压力梯度、合理井距、排距、井网密度、井网适应性评价、注水开发等研究。本论文的重点是对BMN区进行井网加密研究,在精细的地质建模和油藏工程的基础上,以油藏数值模拟方法为研究手段,对油藏工程研究提出的调整措施,进行对比分析与论证,优选出适合本油田开发的加密井网调整开发方案。本文设计了3类加密方案：第一类方案的加密方式是在油井排两口油井之间加密一口水井,提高动用程度。第二类方案是在注水井周围加密四口井,在水井与侧向井中间位置加密四口油井,提高侧向上的动用程度。第三类方案是在前期合理排距研究的基础上缩小井排排距,加密井也处在水井与侧向井的中间位置,提高侧向区域的动用程度。通过数值模拟对开发指标进行对比,优选出最佳井网加密方案。最优加密方案是排距缩小为110m的加密形式,加密井数296口,采出程度为18.48%。
[Abstract]:With the development of conventional reservoirs and the continuous improvement of reservoir development technology in China, the exploration and development of low permeability and ultra-low permeability reservoirs has become an important guarantee for the sustainable development of China's petroleum industry. However, the development of low permeability reservoir technology is more important because it is difficult to develop, high cost and so on. The BMN area is a typical lithologic reservoir with an average permeability of 1.34mD. this paper takes Chang81 formation as the target interval, takes petroleum geology and reservoir development technology as the theoretical basis, and combines the field data of the block. Geological modeling and numerical simulation are used to study the starting pressure gradient, reasonable well spacing, row spacing, well pattern density, well pattern adaptability evaluation, water injection development and so on. The emphasis of this paper is to carry out well pattern infill research in BMN area. On the basis of fine geological modeling and reservoir engineering, the adjustment measures proposed in reservoir engineering research are analyzed and proved by using reservoir numerical simulation method as research means. The scheme of adjustment and development of infill well pattern suitable for the development of this oil field is selected. In this paper, three kinds of infilling schemes are designed: the first one is to infill a well between two wells in order to improve the production degree. The second scheme is to infill four wells around the injection wells and four wells in the middle of the wells and sideways to improve the production degree of the sideways. The third scheme is to reduce the well spacing on the basis of the study of reasonable spacing in the early stage, and the infill well is also located in the middle position of the well and the lateral well to improve the production degree of the lateral area. The optimum well pattern infill scheme is selected by comparing the development index with numerical simulation. The optimal infill scheme is an infill form with a row distance of 110m, 296 infill wells, and a recovery degree of 18.48m.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE348

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