摘要
针对裂缝型油藏剖面上的尖峰状吸水比较普遍、注入水平面上单向突进、地层能量低、注采调控难度大等问题，提出了“堵调驱”相结合的治理思路，在中高渗透层段，主砂体带方向，采用强度适中的调剖体系。利用相对分子质量较低、增黏性好、整体推进能力强、溶液的可逆超分子空间网络结构和可逆的物理“交联”特性的耐温耐盐聚合物GRF-5作为调剖体系的主剂，按照40～60℃、矿化度10000mg／L左右的具体油藏条件，通过对交联剂、助剂的筛选，研制出成胶强度14000～80000mPa·s、地面成胶时间2～12d、满足大剂量注入要求的2个调剖配方和5个封堵配方组成的深部调剖体系。并进行了深部调剖体系的抗剪切性和长期稳定性评价，为该类油藏的调剖治理奠定了基础。
The idea of a combination of ＂blockage, adjustment, drive＂ is proposed to deal with the problems in fracture type reservoirs, such as peak-shaped water injection profile, one-way water breakthrough, low producing energy, and difficult injection-production control etc. Moderate-intensity profile control system is adopted in medium-to-high permeability intervals along the direction of the main sand body distribution. The deep profile control system is developed with polymer GRF-5 as the main agent through screening the cross linking agent and auxiliary agent according to the specific reservoir conditions of temperature of 40 -60 ~C and salinity of 10 000 mg/L. The deep profile control system consists of two profile control formulas and five plugging formulas and can meet the requirement of high-dose injection, with gel intensity of 14 000 -80 000 mPa·s and surface gelation time of 2 - 12 d. Polymer GRF-5 is resistant to temperature and salt, with relatively low molecular weight, good viscosifying capacity, strong overall-propulsion capacity, reversible supermolecule network structure, and reversible physical cross-linking feature. Furthermore, both the shearing resistance and long-term stability of the deep profile control system are evaluated, which lay a foundation for the profile control in fracture type reservoirs.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2010年第4期134-138,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家科技重大专项“低渗透油藏中高含水期综合调整技术”（2008ZX05013-005）子课题：“新型堵剂研发及复合段塞优化实验”资助.
关键词
裂缝型油藏
深部调剖
耐温耐盐聚合物
fracture type reservoirs
deep profile control
temperature-salt resistant polymer
