海域天然气水合物完井液体系构建及性能评价  

Offshore Gas Hydrate Completion Fluid System Construction and Performance Evaluation

作　　者：冯明 廖波 王金堂 曾先进 FENG Ming;LIAO Bo;WANG Jintang;ZENG Xianjin(Hainan Energy LTD,Haikou,Hainan 570100;CNOOC China Limited,Hainan Branch,Haikou,Hainan 570100;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580)

机构地区：[1]中海油海南能源有限公司,海口570100 [2]中海石油(中国)有限公司海南分公司,海口570100 [3]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《钻井液与完井液》2024年第1期133-140,共8页Drilling Fluid & Completion Fluid

基　　金：国家自然科学基金面上项目“海域水合物储层钻井液酶响应型暂堵机制及调控方法”(52274025);中国海洋石油集团有限公司科技项目“琼东南盆地水合物试采钻完井配套技术研究”(KJZH-2021-0001-00)。

摘　　要：砾石充填防砂方式是解决水合物储层开采出砂的有效手段,但与之配套的完井液体系面临水合物二次生成和砾石充填效率不高等技术难题。结合南海常规油气藏开发完井经验,考虑水合物储层的特殊性,构建了不同水合物完井液体系,评价了体系性能。研究结果表明,常用的热力学抑制剂乙二醇和盐类需要比较高的添加量才能达到比较好的抑制效果,但较高的完井液密度无法满足现场施工要求,需要替代使用动力学抑制剂;使用自行研发的SYZ-2动力学抑制剂配制的完井液体系能够满足现场各项指标要求,取得比较好的完井效果。优选出完井液配方为:盐水+2.5%PF-HCS+2.0%PF-CA101HT+6.5%NaCl+1.0%SYZ-2。Gravel packing is an effective method for preventing sand production during the exploitation of gas hydrate reservoirs.However,the accompanying completion fluid system faces technical challenges,such as secondary hydrate formation and low gravel packing efficiency.Therefore,this paper combines the experience of conventional oil and gas reservoir development in the South China Sea,considers the particularity of gas hydrate reservoirs,constructs different gas hydrate completion fluid systems,and evaluates the complete performance of these systems based on laboratory experiments and numerical simulation techniques.The research results show that commonly used thermodynamic inhibitors such as ethylene glycol and salts require relatively high addition amounts to achieve good inhibition effects,but the higher completion fluid density cannot meet the on-site construction requirements,so kinetic inhibitors need to be used as substitutes.The experimental tests and numerical simulation results show that the completion fluid system formulated with the self-developed SYZ-2 kinetic inhibitor can meet the requirements of various on-site indicators and achieve good completion effects.After comparative analysis,the optimal completion fluid is brine+2.5%PF-HCS+2.0%PFCA101HT+6.5%NaCl+1.0%SYZ-2.

关 键 词：天然气水合物 完井 砾石充填 抑制剂 

分 类 号：TE257.6[石油与天然气工程—油气井工程]