摘要
用正交试验法研究了聚合物泥浆的各项性能及抑制性能与其它性能之间的相互关系,提出了复配型聚合物泥浆内部结构的形成机理。结果表明:聚合物泥浆内部结构的性质是影响抑制性能的关键因素;复配KHm、CMC、SPC等含有丰富水化基团和吸附基团的处理剂,可有效地改善聚合物泥浆的内部结构,是强化聚合物泥浆押制性能的基本途径。根据室内试验结果优选出的聚合物泥浆体系在矿场试验中取得了良好的效果。
The inhibitory ability of polymer drilling fluids (PDFs) is studied in relation to their basis characteristics, i. e. API fluid loss, cake quality, stability under storage, and dynamic yield stress, in a series of orthogonally designed laboratory tests and determined as a comprehensive parameter from experimental data of immersion, rolling and recovery, penetration, and radial dilation tests on artificial cores. It is shown that the main factor in inhibitory performance of a PDF is the nature of its interior network structure and the basic way to enhance its inhibiting action is to regulate and optimize this structure. An optimum network structure can be obtained through introducing into drilling fluids in combination those treating chemicals with tremendous hydratable, adsorbing, and, in particular, hydrogen bondforming radicals such as CMCs and humic acid products. These chemicals form complex-adsorbate ensembles with each other and with bentonite particles and thus create a properly structured, medium-strengthened network with polymer chains extended sufficiently. The PDFs with such a network structure will produce dense protective layers on the solid surfaces in contact, i. e. they can inhibit the yield of cuttings, stabilize hole walls and protect the strata in oily reservoir being drilled. The above statements have been proved by the results of many field tests.
出处
《油田化学》
CAS
CSCD
北大核心
1991年第2期93-98,92,共7页
Oilfield Chemistry
