Synthesis and Performance Evaluation of Fiber Reinforced Gel
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摘要: 暂堵材料的性能很大程度上决定了暂堵转向改造效果的好坏，而常规暂堵材料往往不能满足超深、超高温、超高压、亏空储层施工需要。针对上述问题，以耐温达到160 ℃、强度高于30 MPa、破胶时间达到10 h为目标，提出将温敏凝胶和全可降解纤维合成纤维强化凝胶。其技术原理是，温敏凝胶的化学网状结构和纤维的物理网状结构协同形成了三维复合网状骨架，大幅提高了暂堵材料的强度，对纤维强化凝胶进行性能评价。结果表明，在80～100 ℃下，纤维强化凝胶的成胶时间可控制在5～26 min；暂堵时间也大幅提高，160 ℃下近10 h才完全破胶；实验2 mm缝宽条件下，承压能力超过30 MPa，且缝宽越大承压能力越高，6 mm缝宽下承压能力可达到40 MPa，适合“三超”亏空储层暂堵转向改造，能够满足现场施工需要。Abstract: The performance of temporary plugging materials largely determines the effect of temporary plugging transformation, while conventional temporary plugging materials often cannot meet the needs of ultra-deep, ultra-high temperature, ultra-high pressure and deficit reservoir construction. In view of the above problems, with the goal of temperature resistance reaching 160 ℃, strength higher than 30 MPa, and gel breaking time reaching 10 h,this paper proposes to synthesis of thermosensitive gel and all-degradable fiber into fiber reinforced gel.The technical principle is that the chemical network structure of thermosensitive gel and the physical network structure of fiber form a three-dimensional composite network framework, which greatly improves the strength of temporary plugging materials.The performance evaluation showed that the gelation time of the fiber-reinforced gel could be controlled within 5-26 min at 80-100 ℃ ; the temporary plugging time was also greatly improved, and the gel was completely broken at 160 ℃ for nearly 10 h.In the experiment, under the condition of 2 mm fracture width, the bearing pressure ability is more than 30 MPa, and the larger the fracture width is, the higher the bearing capacity is. Under the condition of 6 mm fracture width, the bearing capacity can reach 40 MPa, which is suitable for the temporary plugging and steering transformation of the “three excesses” depleted reservoir, and can meet the needs of field construction.
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Key words:
- "three excesses"reservoir /
- temporary plugging diverting /
- fiber /
- gel
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