新型交联酸液体系的研制及其应用

针对滩坝砂低渗透油藏渗透率低、储量规模大、储层物性差、非均质严重、层间差异大等地质特点，研制了新型地面交联酸液体系，通过室内交联和破胶实验，筛选出了能在强酸性条件下交联，成本较低的稠化剂和交联剂，并配制了交联酸进行室温成胶和破胶实验，确定了室内最优的交联比和聚合物黏度，加入添加剂配制成交联酸体系，分别进行成胶、破胶、缓蚀、助排、耐温实验。新型地面交联酸液体系具有高黏度、低滤失，低酸岩反应速度，更大改造半径等优点，在滨10X1 井应用取得良好增产效果。

A Utility Mode Surface Cross-linked Acid System to Improve the BeachBar Sand Low-permeability Development Effects

Aiming at beach-bar reservoirs with low permeability，large-scale reserves，poor properties，severe heterogeneity，large differences between layers，a new ground crosslinked acid system is developed. By indoor crosslinking and gel breakingtest，a low cost of thickening agent and crosslinking agent are screened out which can crosslink under strong acidic conditions，and are used to form the crosslinked acid. Through gel formed and broken tests under room temperature，the best crosslinkedratio and polymer viscosity are determined indoor. Then，additives are used to form the cross linked acid system. Throughsuch tests as gel formed and broken，corrosion，cleanup，temperature，some advantages of the new system are shown with highviscosity，low filtration，low acid-rock reaction speed，and greater transformation radius，which is applied on well Bin-10X1，and has achieved good stimulation effectis.