白豹B区特低渗油藏聚合物微球调驱技术研究  

Study on Flooding Modification Technology with Polymeric Microsphere in Block B of Baibao Ultra-Low Permeability Oilfield

作　　者：李伟[1] 周军 刘渠洋 冷福 成友友 邱祥亮 Li Wei;Zhou Jun;Liu Quyang;Leng Fu;Cheng Youyou;Qiu Xiangliang(No.7 Oil Production Plant,PetroChina Changqing Oilfield Company;College of Petroleum Engineering,Xi’an Shiyou University;West Low Permeability-Ultralow Permeability Reservoir Development and Management Engineering Research Center of MOE,Xi’an Shiyou University)

机构地区：[1]中国石油长庆油田分公司第七采油厂,陕西省西安市710021 [2]西安石油大学石油工程学院 [3]西安石油大学西部低渗-特低渗油藏开发与治理教育部工程研究中心

出　　处：《石油机械》2019年第12期75-81,共7页China Petroleum Machinery

基　　金：国家科技重大专项“CO2捕集、驱油与埋存技术示范工程”(2016ZX05056);中国石油集团公司重大科技专项“长庆油田5 000万吨持续高效稳产关键技术研究与应用”(2016E-0510)

摘　　要：白豹油田B区块为中高含水期的特低渗油藏,存在水驱动用程度不均、油藏含水上升快以及油井见水原因复杂等问题,常规调驱方法有效率低、有效期短。鉴于此,以B区为先导试验区,采用室内试验和矿场实施相结合的方法,系统研究了特低渗油藏聚合物微球的调驱机理、最优工艺参数及经济可行性。研究结果表明:聚合物微球调驱机理主要包括封堵性、膨胀性和滞留性等3个方面;特低渗油藏聚合物微球调驱的最优粒径为100 nm,含水质量分数较低、产油量不大的井组最优聚合物微球质量分数为0.2%,高含水井组最优聚合物微球质量分数为0.5%,最佳注入时间为5~7个月;B区聚合物微球调驱投入产出比可达到1.77以上,经济效益显著。研究结果可为鄂尔多斯盆地及类似特低渗油藏后续调驱提供指导。The Block B of Baibao Oilfield is an ultra-low permeability reservoir with medium and high water-cut. Its problems such as uneven water flooding degree, rapid increase of water cut, and complicated water breakthrough causes make the conventional method ineffective. In view of this, the Block B is chosen as the pilot test zone, both laboratory test and field application were conducted to systematically study the mechanism, optimal process parameters and economic feasibility of polymer microsphere flooding modification in the ultra-low permeability reservoir. The results show that the mechanism of polymer microsphere flooding modification mainly includes plugging, swelling and retention. The optimal particle size of polymer microspheres for the ultra-low permeability reservoir is 100 nm. The optimal polymer microsphere mass fraction for the well group with low water cut and oil production is 0.2%. The optimal polymer microsphere concentration mass fraction for the high water cut well group is 0.5%. The optimal injection time is 5~7 months. The polymer microsphere flooding modification can achieve an input-output ratio of over 1.77, presenting a remarkable economic benefit. The study results can provide theoretical and practical guidance for the subsequent flooding modification of the Ordos Basin and similar ultra-low permeability reservoirs.

关 键 词：白豹油田 特低渗油藏 聚合物微球 调驱机理 投入产出比 

分 类 号：TE348[石油与天然气工程—油气田开发工程]