CAJ | 학술논문

通过粒度分布、扫描电镜、ZETA电位分析,考察了重晶石、活化重晶石、活化铁矿粉3种加重剂及其复配对钻井液加重到不同密度时对滤饼黏滞系数的影响.实验结果表明:高密度条件下,3种加重剂均有改善钻井液润滑性的作用,活化铁矿粉、活化重晶石、重晶石加重钻井液改善润滑性的临界密度分别为1.2、1.4和1.6 g/cm3;超过此密度的一定范围内,钻井液的润滑性均增强.复配加重比单独加重的润滑性效果更好.
통과립도분포、소묘전경、ZETA전위분석,고찰료중정석、활화중정석、활화철광분3충가중제급기복배대찬정액가중도불동밀도시대려병점체계수적영향.실험결과표명:고밀도조건하,3충가중제균유개선찬정액윤활성적작용,활화철광분、활화중정석、중정석가중찬정액개선윤활성적림계밀도분별위1.2、1.4화1.6 g/cm3;초과차밀도적일정범위내,찬정액적윤활성균증강.복배가중비단독가중적윤활성효과경호.
Through the analysis of the particle size distribution, scanning electron microscope, ZETA potential, the friction coef-ficients?of?mud?cakes?are?investigated?when?water-based?drilling?fluids?are?added?to?different?densities?by?three?weighting?additives?of?barite,?activation?barite,?activation?iron?ore?powder?and?their?complex?combination.?The?experimental?results?show?that?under?high?density,?all?the?three?weighting?additives?can?enhance?the?lubricity?of?the?drilling?fluids.?To?improve?the?lubricity?of?water-based?drilling?fluids,?the?critical?densities?of?drilling?fluids?added?by?barite,?activation?barite?and?activation?iron?ore?powder?are?1.6?g/cm3,?1.4?g/cm3 and?1.2?g/cm3,?respectively.?The?lubricity?of?the?drilling?fluids?will?be?improved?in?a?certain?range?beyond?the?critical?density.?Complex?combination?is?better?than?the?every?single?additive.