一种无机凝胶型调剖剂及调剖方法

• Format: Patent
• Language: Chinese
• Published: 30.08.2022
• Subjects: ADHESIVES; CHEMISTRY; DYES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINING; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PAINTS; POLISHES

本发明公开了一种无机凝胶型调剖剂及调剖方法。该无机凝胶型调剖剂包括工作液Ⅰ、隔离工作液Ⅱ和工作液Ⅲ。本发明的无机凝胶型调剖剂通过交替注入的方式，几种工作液在地层中发生交联反应，每一种工作液本身可形成封堵能力，两种工作液接触后又能够发生反应，凝聚形成以油泥为骨架、具有空间网状结构的凝胶体，有效提高了化学剂的利用率和堵剂的封堵性能。本发明的无机凝胶型调剖剂适用于稠油、稀油油藏措施井深部调剖；原料易得，调剖方法简便，同时该无机凝胶型调剖剂耐温性能好，封堵能力突出，同时现场采用多段塞交替注入工艺，通过调整药剂浓度和段塞用量，能够控制反应速度和反应时间，实现地层深部调剖。 The invention discloses an inorganic gel type profile control agent and a profile control method. The inorganic gel type profile control agent comprises a working solution I, an isolation working solution II and a working solution III. The inorganic gel type profile control agent has the advantages that the alternate injection mode is used, several working solutions are subjected to a cross-linking reaction in a stratum, each working solution can form plugging capacity, the two working solutions can react and coagulate to form gel which takes oil sludge as a framework and has a spatial reticular structure after being in contact, and the utilization rate of a chemical agent and the plugging performance of the plugging agent are ef