基于模糊评判决策的天然气驱油藏开发效果评价  

Evaluation Method of Development Effect of Natural Gas Drive Reservoir Based on Fuzzy Evaluation Strategy

作　　者：胡书勇[1] 郑冰洋 阴艳芳 HU Shuyong;ZHENG Bingyang;YIN Yanfang(National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China;No.2 Oil Production Plant,Northwest Oilfield Company,SINOPEC,Luntai,Xinjiang 841604,China;Development Division,Liaohe Oilfield Company,PetroChina,Panjin,Liaoning 124010,China)

机构地区：[1]油气藏地质及开发工程全国重点实验室·西南石油大学,四川成都610500 [2]中国石化西北油田采油二厂,新疆轮台841604 [3]中国石油辽河油田分公司开发事业部,辽宁盘锦124010

出　　处：《西南石油大学学报（自然科学版）》2024年第1期105-114,共10页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家自然科学基金(51574199)。

摘　　要：注天然气提高采收率有着良好的应用前景,但目前针对天然气驱油藏缺乏相对应的开发效果评价指标体系及标准,无法对开发效果进行正确、客观、科学的评价。根据油田开发行业标准、水驱和CO_(2)混相驱开发效果评价指标体系,筛选出了评价天然气驱油藏开发效果的10项评价指标:采收率提高幅度、换油率、增产倍比、储量动用程度、储量控制程度、压力保持水平、存气率、气油比增长倍数、阶段注采比及注气时机。结合W天然气驱油藏的地质特征、生产动态以及注气开发特点,建立了天然气驱开发效果评价指标体系及评价标准。应用层次分析法、模糊变换原理和最大隶属度原则建立了基于模糊综合评判决策的天然气驱油藏开发效果评价方法,将传统的单指标、定性开发效果评价转化为多因素、定量的开发效果评价。应用实例表明,该天然气驱开发效果评价指标体系及评价方法具有可行性和有效性,对同类型天然气驱油藏开发效果的评价具有一定的指导意义。Injecting natural gas to enhance oil recovery has a good application prospect,but at present,there is a lack of corresponding development effect evaluation index system and standard for natural gas flooding reservoirs,and it is impossible to evaluate the development effect correctly,objectively and scientifically.According to the industry standard of“oilfield development level classification”and the evaluation index system of water flooding and CO_(2) miscible flooding development effect,10 evaluation indexes for evaluating the development effect of natural gas flooding reservoirs are selected:recovery improvement range,oil exchange rate,production increase ratio,reserve utilization degree,reserve control degree,pressure maintenance level,gas storage rate,gas-oil ratio increase ratio,stage injection-production ratio and gas injection timing.Combined with the geological characteristics,production performance and gas injection development characteristics of W natural gas drive reservoir,the evaluation index system and evaluation standard of natural gas drive development effect are established.The development effect evaluation method of natural gas flooding reservoir based on fuzzy comprehensive evaluation decision is established by using analytic hierarchy process,fuzzy transformation principle and maximum membership degree principle.The traditional single index and qualitative development effect evaluation are transformed into multi-factor and quantitative development effect evaluation.The application example shows that the evaluation index system and evaluation method of natural gas flooding development effect are feasible and effective,and have certain guiding significance for the evaluation of the development effect of the same type of natural gas flooding reservoir.

关 键 词：天然气驱油藏 开发效果评价 评价指标体系 层次分析法 模糊评判决策 

分 类 号：TE341[石油与天然气工程—油气田开发工程]