弱胶结砂岩储层分子膜稳定剂体系的制备与性能

Preparation and Property of Membrane Stabilizer System for Weakly Consolidated Sandstone Reservoir

李常友 陈 雪 李 鹏 张川庭 马朋举

LI Changyou CHEN Xue LI Peng ZHANG Chuanting MA Pengju

针对弱胶结砂岩储层阳离子稳砂剂体系耐冲蚀性能差、稳砂有效期短问题，研发了一种集合树脂胶结剂强度好、季铵盐渗透率伤害小等特点MS型分子膜稳定剂体系，并对其分子结构、分子膜耐冲刷性、稳砂抑砂性、流体渗流性能进行了评价。研究结果表明，MS分子膜稳定剂体系具有较高强度，拉伸强度为2.5 MPa、断裂伸长率可达112%，耐冲蚀性能较好。MS稳定剂具有较强的稳砂抑砂能力，MS稳定剂质量分数为2%、处理量2.0 PV、处理时间8 h时，出砂浓度低于0.15 g/L；MS稳定剂具有阻水不阻油的功能，质量分数2%、注入体积2.5 PV、处理时间8 h时，岩心水相渗透率从510×10-3μm2降至450×10-3μm2，而油相渗透率几乎未变，在782×10-3μm2左右。稳定剂MS通过物理吸附、化学胶结实现对弱胶结地层微粒原位稳定，达到防止出砂目的。

Aiming at the problem that the erosion resistance of the cation sand stabilizer system for weakly consolidated sandstone reservoir is poor and the effective period of sand stabilization is short，a MS type molecular film stabilizer system combining good strength of resin binder with small permeability damage of quaternary ammonium salt was developed，and the molecular structure， molecular film erosion resistance，sand stabilization and fluid seepage performance of the stabilizer was evaluated. The results showed that the MS molecular film stabilizer system had higher strength and erosion resistance，the tensile strength was of 2.5 MPa，the elongation at break was up to 112%. The MS molecular film stabilizer system had higher ability of sand stabilization. When the mass fraction of MS stabilizer was 2%，the treatment amount was 2.0 PV，and the treatment time was 8 h，the sand production was less than 0.15 g/L. The MS molecular film stabilizer system had the function of blocking water and not blocking oil. When the mass fraction of MS stabilizer was 2%，the treatment amount was 2.0 PV，and the treatment time was 8 h ，the core water phase permeability reduced from 510×10-3 μm2 to 450×10-3 μm2，while the oil phase permeability basically unchanged，being of 782×10-3 μm2. The MS molecular film stabilizer achieved in-situ stabilization of the weakly consolidated formation particles by physical adsorption and chemical cementation to prevent sand production.

10.19346/j.cnki.1000-4092.2020.01.011