摘要
中国深部大陆科学钻探井设计井深将超过万米,井底地层温度可能在300 ℃以上,井内钻井液将长期处于高温高压环境,性能会受到严重的影响和破坏.室内实验通过在不同加量、不同温度（30、90、120、150、180、210、240 ℃）等条件下测试钻井液的流变性能及高温高压滤失量,对抗240 ℃高温钻井液材料及处理剂进行了优选,最后选用4％新疆膨润土与抗高温材料HPS复合作造浆材料,添加了高温保护剂GBJ;复配使用抗高温降滤失剂LQT、SPNH、JSSJ、JSJ-1、SMP-Ⅰ作降滤失剂,引入了新型抗高温降滤失剂DDP和抗高温降黏剂JNJ. 评价了优选配方的高温高压滤失量和流变性,在240℃高温滚动16～72 h后,采用金属滤板直接在230℃高温下测试钻井液性能,测试温度由低到高,再由高到低.结果表明：优选出的配方在240℃下具有良好的高温稳定性和流变性,高温高压滤失量低.
China is now drilling a scientific exploration well deeper than 10,000 m with downhole temperature probably exceeding 300 ℃. Drilling fluid properties under such high temperatures for a long time will inevitably deteriorate. Laboratory tests have been conducted on several mud materials under different concentrations and temperatures(30 ℃, 90 ℃, 120 ℃, 150 ℃, 180 ℃, 210 ℃, and 240 ℃) to optimize the performance of these mud materials for high temperature use. An optimized mud formulation was developed using 4% Xinjiang bentonite and high temperature material HPS for viscosity building, GBJ as high temperature stabilizer, LQT, SPNH, JSSJ, JSJ-1 and SMP-1 as fluid loss reducer. To enhance the stability of the formulation, a high temperature fluid loss reducer DDP and a high temperature thinner DESCO were introduced into the formulation. This mud formulation was hot rolled at 240 ℃ for 16-72 hours for its HTHP filtration rate and rheology, with testing temperatures first increased and then decreased. The tests show that the optimized formulation has good high temperature stability and ideal rheology, as well as low HTHP fluid loss.
出处
《钻井液与完井液》
CAS
北大核心
2014年第5期10-13,95,共4页
Drilling Fluid & Completion Fluid
基金
公益性行业科研专项(深部探测技术与实验研究专项)"深部大陆科学钻探装备研制高温钻井液体系研究"(201011082-2)的研究内容
关键词
抗高温水基钻井液
钻井液配方
造浆材料
高温保护剂
高温降滤失剂
High temperature water base drilling fluid
Drilling fluid formulation
Yield material
High temperature stabilizer
High temperature fluid loss reducer
