超分子聚合物化学堵漏技术的应用研究  

Application Research on Supramolecular Polymer Chemical Leak Sealing Technology

作　　者：房炎伟 房晓伟 吴义成 叶安臣 余加水 裴成 Fang Yanwei;Fang Xiaowei;Wu Yicheng;Ye Anchen;Yu Jiashui;Pei Cheng(Western Drilling Fluid Branch,Karamay Xinjiang 834000,China;Zhong'an United Coal Chemical Co.,Ltd.,Huainan Anhui 232000,China)

机构地区：[1]西部钻探钻井液分公司,新疆克拉玛依834000 [2]中安联合煤化有限责任公司,安徽淮南232000

出　　处：《山西化工》2024年第11期202-203,206,共3页Shanxi Chemical Industry

摘　　要：玛湖区块储层井段地质裂缝、孔隙发育,井漏发生率高,堵漏效果较差。为提高堵漏效果,提高油田开发效益,开展了超分子聚合物堵漏技术的研究。对超分子聚合物水溶液的剪切稀释特性研究表明,超分子聚合物TDL-1水溶液大致呈现高剪切速率下的低黏度和低剪切速率下的高黏度,在黏度转变点附近很小的剪切速率变化就可引起黏度的较大改变。砂床封堵试验表明10%~15%的TDL-1溶液可以对砂床形成较好的胶结,封堵压力达到4 MPa。采用超细碳酸钙作为增强剂,复配桥堵材料,形成了堵漏配方,对不同宽度缝板的承压能力可达到6 MPa。玛湖区块现场应用8口井,堵漏一次成功率达到88.9%,与常规桥堵技术相比,平均堵漏损失时间降低93.7%,漏失量降低96%。超分子聚合物堵漏技术的研究与应用表明,该技术具有地层裂缝适应性广、现场配置与泵送容易、堵漏成功率高、不易复漏等优点,为玛湖区块提高钻探开发效果奠定了良好基础。The geological fractures and pores in the reservoir section of the Mahu block are developed,and the occurrence rate of well leakage is high,but the plugging effect is poor.In order to improve the plugging effect and enhance the efficiency of oilfield development,research has been conducted on supramolecular polymer plugging technology.The study on the shear dilution characteristics of supramolecular polymer aqueous solutions shows that the supramolecular polymer TDL-1 aqueous solution generally exhibits low viscosity at high shear rates and high viscosity at low shear rates.A small change in shear rate near the viscosity transition point can cause a significant change in viscosity.The sand bed sealing test shows that 10%~15% TDL-1 solution can form good bonding on the sand bed,with a sealing pressure of 4 MPa.A sealing formula was formed by using ultrafine calcium carbonate as a reinforcing agent and compounding bridge plugging materials,with a pressure bearing capacity of up to 6 MPa for different width crack plates.The Mahu block has been applied to 8 wells on site,with a one-time success rate of 88.9% for plugging.Compared with conventional bridge plugging techniques,the average plugging loss time has been reduced by 93.7%,and the leakage volume has been reduced by 96%.The research and application of supramolecular polymer plugging technology have shown that it has the advantages of wide adaptability to formation fractures,easy on-site configuration and pumping,high success rate of plugging,and low risk of re leakage,laying a good foundation for improving drilling and development efficiency in the Mahu block.

关 键 词：超分子聚合物 堵漏 钻井 

分 类 号：TE242[石油与天然气工程—油气井工程]