流场重整提高采收率技术研究  

RESEARCHES ON THE EOR TECHNIQUE BY FLOW FIELD REARRANGEMENT

作　　者：姜瑞忠[1] 侯玉碚 王平[1] 刘继芹[1] 梁宇 

机构地区：[1]中国石油大学石油工程学院,山东青岛266555 [2]胜利油田地质科学院,山东东营257051 [3]UniversityofWyoming,Laramie,Wyoming,USA,82071

出　　处：《大庆石油地质与开发》2012年第4期73-77,共5页Petroleum Geology & Oilfield Development in Daqing

摘　　要：油田进入高含水期后，储层参数发生变化，注水井与采油井问形成优势通道，降低注入水的利用率，认识评价和优势流场可以有针对性地进行流场重整提高采收率。选取孔道半径、过水倍数、含K率、流体流速为指标，利用层次分析法和模糊综合评判方法建立了油藏流场评价体系，并将该体系应用到埕东区块，发现主力层系Ng2^51、Ng2^52、Ng3^31、Ng3^32、Ng3^4。优势流场的区域较大，根据流场重整的原则，进行井网调整、层系调整、生产制度调整进行流场重整，流线数值模拟显示流场重整之后总流场强度降低，提高了注入水的利用率，证明了该体系的有效性，为高含水油田调整提供决策依据。After entering into the high water-cut stage of an oil fields, the reservoir parameters will change, and more seriously the domain channels will be formed between producers and injectors, thus the used ratio of the injected water will be lowered, so the understandings evaluation and flow field rearrangement and the domain field determination can enhance the oil recovery. The pore radius, water flooded PV, water cut and fluid velocity are chosen as evaluating indexes and furthermore by means of AHP（ analytical hierarchy process） and fuzzy comprehensive evaluation method, the evaluating system for the oil reservoir are established. At the meantime, the system is applied in Chengdong Block, the domain flow fields of the main series of strata （Ng2^51, Ng2^52, Ng3^31, Ng3^32, Ng3^4） are found larger. According to the principles of flow field rearrangement, the following adjustments such as well pattern, series of the strata and production system are implemented. The numerical simulation of the streamline show that after the rearrangement of the flow fields the total field strength can be lowered, the usage ratio of the injected water has been enhanced, thus the effectiveness of the system is proven and furthermore the achievements a-bore can provide decision-making evidences for high water-cut oilfield adjustment.

关 键 词：高含水 流场 数值模拟 流线 模糊综合评判 

分 类 号：TE341[石油与天然气工程—油气田开发工程]