摘要
针对当前国内外超高温水基钻井液滤失性及高温稳定性调控难点,新研制出抗240℃高温、抗盐聚合物降滤失剂HTP–1。热重分析表明,HTP–1分子链热解温度达320℃以上,热稳定性强;在各种钻井液基浆中的降滤失作用评价结果表明,HTP–1在钻井液中具有优异的抗高温(240℃)抗盐(饱和)、抗钙(0.5%)降滤失作用,优于国内外同类产品。通过吸附实验、粒度分布测量、胶体稳定性测试和泥饼压缩性测试等手段,探讨了HTP–1的降滤失作用机理:(1)在粘土颗粒上的吸附量大且吸附牢固,受矿化度、pH值和温度的影响小;(2)老化(240℃/16 h)前后均能明显改善泥饼可压缩性,降低其渗透率;(3)增强钻井液体系的胶体稳定性,改善其中的颗粒粒径级配。
Aimed at the present problem of filtration property and high temperature stability adjusting of high temperature water base drilling fluid around the world, the polymer fluid loss agent HTP-1 anti 240℃ and salts are developed. The result of gravitational thermal analysis indicates that the pyrolytic temperature of molecule chain of HTP-1 is up to 320℃, and has strong thermal stability. Evaluation results of dropping filtration performance several drilling fluid slurry show that HTP- 1 has excellent fluid loss decreasing performance and high temperature （240℃）, salt （saturated brine） and calcium（0.5%） tol- erance, overmatching congeneric fluid loss additive at home and abroad. The mechanism of action of HTP-1 is studied by experiments such as adsorption, particle size distribution measuring, colloid stability measuring and compressibility of filter cake testing, which is as follows： HTP- 1 （ 1 ） adsorbs clay particles fast and in large amounts, its performance is not very much influenced by salt pH and temperature; （2） observably reduce the permeability and improve compressibility of filter cake before and after aged sixteen hours under 240℃ ; （3） improves particle size grading and colloid stability of drilling fluid system.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期129-134,共6页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家高技术研究发展计划项目(2006AA06A19–5)
关键词
深井
高温
水基钻井液
降滤失剂
作用机制
deep well
high temperature
water based drilling fluid
fluid loss agent
operation mechanism
