适于平湖高温高压大位移井固井的水泥浆体系构建
Construction of Cement Slurry System Suitable for Pinghu High Temperature and High Pressure Extended Reach Well Cementing

平湖油气田油气生产形势严峻，油藏剩余油分布越来越复杂；该地区固井存在气窜风险，封固段较长存在固井漏失风险、井壁稳定性差等问题。通过固井技术难点分析及平湖地区水泥浆性能技术分析，主要针对弹性乳液、增强防窜剂GS12L、增韧防漏纤维、非渗透剂及缓凝剂材料的筛选，构建了一套适合平湖气田的抗高温韧性防窜水泥浆体系。通过在水泥浆体系中添加非渗透剂BX82L优化了水泥浆配方。试验结果显示，BX82L能够显著改善水泥浆与油基界面的胶结强度，I、II界面胶结强度均得到了显著提高。该水泥浆体系具有较好的防窜性能，能够有效抑制油气上窜。
The situation of oil and gas production in Pinghu oil and gas field is severe, and the distribution of remaining oil in the reservoir is more and more complex. There is a risk of gas channeling in cementing in this area, and there is a risk of cementing leakage and poor wellbore stability in the long sealing section. Based on technical analysis of cementing difficulties and technical analysis of cement slurry in Pinghu area, a set of high temperature resistant, tough, and anti-channeling cement slurry system suitable for Pinghu gas field is constructed, mainly aiming at the selection of elastic emulsion, enhanced anti-channeling agent GS12L, toughening and leakproof fiber, non-permeable and retarder agent material. The formulation of the cement slurry was optimized by adding the non-permeable agent bx82l to the cement slurry system. The experimental results show that bx82l can significantly improve the cementation strength of the interface between the cement slurry and the oil-based; the bond strength of interface I and II has been significantly improved. The cement slurry system has good anti-channeling performance and can effectively inhibit the upward channeling of oil and gas.？