针对稠油开采过程中产生的含油污泥污染环境的问题,以烧黏土、硬石灰为主要原材料研制了含油污泥凝固剂,并以含油污泥凝固剂和含油污泥为主要成分,配制了可在油层凝结固化的含油污泥调剖堵水剂,以达到含油污泥无害化和资源化利用的目的。采用XRD检测和抗压强度测试等手段,对含油污泥调剖堵水剂封堵性能影响因素进行了分析和优化,并评价了其调剖堵水性能。研究表明:该调剖堵水剂具有较长的凝胶时间、良好的施工安全性、可泵注性和适当的结构强度等优点;当含油污泥凝固剂质量分数在17%以上时,岩心封堵率达到98%以上,突破压力在20 MPa以上,具有较高的封堵强度;同时该调剖堵水剂也是一种固体废弃物资源化利用新技术,符合循环经济、绿色发展要求。含油污泥凝固剂技术有效解决了含油污泥外排造成的环境污染问题,为油田综合治理、降低生产成本提供了一种新手段。
Aiming at the problem of oily sludge polluting the environment produced in the process of heavy oil production, an oily sludge coagulant was developed with baked clay and hydraulic lime as the main raw materials, and an oily sludge adjusting and blocking agent that can be coagulated and solidified in the oil layer was formulated with oily sludge coagulant and oily sludge as the main components, so that it can achieve the purpose of harmlessness of oily sludge and utilization of resources.The factors affecting the blocking performance of the oily sludge adjusting and blocking agent were analyzed and optimized, and the adjusting and blocking performances were evaluated through XRD detection and compressive strength. The study shows that the adjusting and blocking agent has the advantages of long gel time, good construction safety, pumpability and appropriate structural strength; when the mass fraction of oily sludge coagulant is above 17%, the core blocking rate is above 98%, and the breakthrough pressure is above 20 MPa, which has high blocking strength; at the same time, the adjusting and blocking agent is also a new technology of resourceful use of solid waste, which is in line with the national policy of circular economy and green development. Oily sludge coagulant technology effectively solves the environmental pollution problem caused by oily sludge discharge, providing a new means for comprehensive oilfield management and reducing production costs.
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