提出在膨润土基钻井液中添加海泡石纳米颗粒来控制其性能,并通过实验研究了不同温度压力条件下海泡石纳米颗粒对膨润土基钻井液流变性、滤失性等性能的影响。测量了添加海泡石纳米颗粒前后膨润土基钻井液在不同温度压力条件下的塑性黏度、动切力和滤失量,并在储集层温度压力条件下对添加海泡石纳米颗粒前后的膨润土基钻井液进行了岩心驱替实验,对比了钻井液的滤失量及对地层的伤害程度。结果表明：添加海泡石纳米颗粒可以提高清水和盐水膨润土基钻井液的塑性黏度和动切力;海泡石纳米颗粒可以在较大的温度和压力范围内特别是高温高压条件下保持钻井液流变性的稳定;储集层温度压力条件下,海泡石纳米颗粒降低了钻井液的滤失量,抑制了砂岩岩心渗透率降低。海泡石纳米颗粒是一种理想的膨润土基钻井液添加剂。图13表3参12
AL-MALKI Needaa
,
POURAFSHARY Peyman
,
AL-HADRAMI Hamoud
,
ABDO Jamil
. 采用海泡石纳米颗粒控制膨润土基钻井液性能[J]. 石油勘探与开发, 2016
, 43(4)
: 656
-661
.
DOI: 10.11698/PED.2016.04.20
Sepiolite nanoparticles were added to the bentonite-based drilling mud to control its properties, and the effects of sepiolite nanoparticles on rheological properties and filtration loss of the bentonite-based drilling mud at different temperature and pressure conditions were studied by experiments. For the bentonite-based drilling muds with and without sepiolite nanoparticles, plastic viscosity, yield point, and fluid loss were measured at different temperature and pressure conditions, the core flooding experiments were also conducted at reservoir pressure and temperatures, and fluid loss and formation damage were measured. The results show that: sepiolite nanoparticles can be used to improve the plastic viscosity and yield point of saline and fresh bentonite-based drilling mud; the bentonite-based drilling mud with sepiolite nanoparticles shows a great stability of rheological properties over a wide range of temperature and pressure, especially at high temperatures and pressures; sepiolite nanoparticles reduce the fluid loss and the permeability reduction at reservoir pressure and temperatures. Sepiolite nanoparticles are an ideal additive for bentonite-based drilling mud.
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