渤南油田低渗高温欠注井伤害机理研究

The Study of Damage Mechanism in Low-permeability and High-temperature Water-injection Wells of Bonan Oilfield

王宝峰 许志赫 许大星 黄波

WANG Bao-feng XU Zhi-he XU Da-xing HUANG Bo

中石油 廊坊分院 压裂酸化中心, 河北 廊坊 065007; 中石化 胜利油田分公司 河口采油厂 工艺研究所, 山东 东营 257015

Fracturing & Acidizing Technical Service Center of Langfang Branch, PetroChina, Langfang 065007, China; Hekou Production Factory of Shengli Oilfield, SINOPEC, Dongying 257015, China

文章系统地研究了渤南油田注水井伤害机理,从地层特性具有的潜在损害(粘土矿物、低孔低渗)、不适当酸化和重复酸化对储层的潜在损害、地层流体的潜在损害、储层敏感性损害因素及油层保护、以往增产措施等可能对低渗储层造成的损害进行了研究,得出相关结论,为渤南油田欠注井采取酸化增注措施提供了依据。

The damage mechanism of water-injection wells in Bonan Oilfield is studied systematically in this paper. We drew some conclusions, according to analyzing and experimenting on the potential damage of formation characteristics(clay mineral, low-porosity and low-permeability), the potential damage of defective acidizing treatment and re-acidizing treatment, the potential damage of formation fluids, the formation sensitivity damage and reservoir protection, the damage of low-permeability formation of pre-stimulation treatment. The results supply theory basis for acidizing treatment of water-injection wells in Bonan Oilfield.