稠油油藏水平井CO_2吞吐井位筛选的模糊评判法  

Fuzzy Evaluation Method for Screening Target Horizontal Wells in Heavy Oil Reservoirs by CO_2 Huff and Puff Process

作　　者：李亚辉[1] 彭彩珍[1] 李海涛[1] 钟吉彬[2] 

机构地区：[1]西南石油大学石油与天然气工程学院,成都610500 [2]中国石油长庆油田分公司勘探开发研究院,西安710018

出　　处：《新疆石油地质》2015年第3期338-341,共4页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2011zx05016-005)

摘　　要：CO2吞吐措施可提高稠油开发效益,因此,应根据候选井的地质条件和井况等指标对吞吐井进行筛选。基于相关资料及数值模拟成果,考虑油藏性质、流体特征以及水平井开采长度等指标,提出了适用于稠油油藏水平井CO2吞吐的井位筛选评价指标体系及等级划分方法,利用模糊评判理论与信息熵理论,提出了井位筛选的具体方法和步骤。根据X油藏已实施吞吐31口井的数据对所提方法进行了验证,验证结果与实际施工情况比较吻合,表明所提方法是可行的,为类似的稠油油藏采用水平井CO2吞吐提供借鉴。Heavy oil exploitation benefit can be improved by CO2 stimulation process.Any horizontal well CO2 huff and puff should be se-lected by the geological conditions and performance of candidate wells.Combined with related data and numerical simulation results,com-prehensive consideration of reservoir properties,fluid characteristics and horizontal well length,this paper put forward the horizontal welllocation selection evaluation index system and grading method suitable for heavy oil reservoirs by CO2 huff and puff process,and concreteapproaches and steps by means of fuzzy evaluation theory and information entropy theory.31 wells data of CO2 stimulation in X reservoirwere used to verity the proposed method.The verification result is accordant with the actual situation,showing that the proposed method isfeasible,and can provide reference and guidance for similar heavy oil reservoir development with horizontal well CO2 huff and puff process.

关 键 词：CO2吞吐 选井 水平井 稠油油藏 模糊评判 

分 类 号：TE345[石油与天然气工程—油气田开发工程]