机械工程学报
機械工程學報
궤계공정학보
CHINESE JOURNAL OF MECHANICAL ENGINEERING
2014年
18期
177-185
,共9页
赵传伟%李增亮%邓良驹%吴海燕
趙傳偉%李增亮%鄧良駒%吳海燕
조전위%리증량%산량구%오해연
油水分离器%数值模拟%分离特性%分流特性%多相流
油水分離器%數值模擬%分離特性%分流特性%多相流
유수분리기%수치모의%분리특성%분류특성%다상류
oil-water hydrocyclone%numerical simulation%split characteristic%separation characteristic%multiphase flow
井下双级串联式油水分离器的工作特性对于井下油水分离系统的工况诊断及调节必不可少。基于代数滑移混合物模型(Algebraic slip mixture model，ASMM)和大涡模拟(Large eddy simulation，LES)模型，针对T228井井况设置相关参数及边界条件，研究井下双级串联式油水分离器的分流特性和分离特性，并与地面试验结果对比。结果表明，入口流量为80～200 m3·d-1时，总分流比的范围随着入口流量的增大而增大，一、二级水力旋流器的溢流口流量之比与总分流比的变化关系是确定的函数关系，底流含油质量分数随着总分流比的增大先减小后增大；额定工况下，第一级水力旋流器起主要分离作用，第二级对于进一步降低底流含油质量分数起关键作用；入口流量和总分流比的组合为(120～140 m3·d-1/0.36～0.74)、(140～160 m3·d-1/0.31～0.77)或(160～180 m3·d-1/0.33～0.76)时，底流含油质量分数不大于0.02%；数值模拟预测的分流特性与试验结果一致，预测的总分流比和底流含油质量分数的关系与试验结果定性一致。通过综合分析分流特性和分离特性，得出进行井下工况调节时入口流量和总分流比的合理范围，为现场试验提供指导。
井下雙級串聯式油水分離器的工作特性對于井下油水分離繫統的工況診斷及調節必不可少。基于代數滑移混閤物模型(Algebraic slip mixture model，ASMM)和大渦模擬(Large eddy simulation，LES)模型，針對T228井井況設置相關參數及邊界條件，研究井下雙級串聯式油水分離器的分流特性和分離特性，併與地麵試驗結果對比。結果錶明，入口流量為80～200 m3·d-1時，總分流比的範圍隨著入口流量的增大而增大，一、二級水力鏇流器的溢流口流量之比與總分流比的變化關繫是確定的函數關繫，底流含油質量分數隨著總分流比的增大先減小後增大；額定工況下，第一級水力鏇流器起主要分離作用，第二級對于進一步降低底流含油質量分數起關鍵作用；入口流量和總分流比的組閤為(120～140 m3·d-1/0.36～0.74)、(140～160 m3·d-1/0.31～0.77)或(160～180 m3·d-1/0.33～0.76)時，底流含油質量分數不大于0.02%；數值模擬預測的分流特性與試驗結果一緻，預測的總分流比和底流含油質量分數的關繫與試驗結果定性一緻。通過綜閤分析分流特性和分離特性，得齣進行井下工況調節時入口流量和總分流比的閤理範圍，為現場試驗提供指導。
정하쌍급천련식유수분리기적공작특성대우정하유수분리계통적공황진단급조절필불가소。기우대수활이혼합물모형(Algebraic slip mixture model，ASMM)화대와모의(Large eddy simulation，LES)모형，침대T228정정황설치상관삼수급변계조건，연구정하쌍급천련식유수분리기적분류특성화분리특성，병여지면시험결과대비。결과표명，입구류량위80～200 m3·d-1시，총분류비적범위수착입구류량적증대이증대，일、이급수력선류기적일류구류량지비여총분류비적변화관계시학정적함수관계，저류함유질량분수수착총분류비적증대선감소후증대；액정공황하，제일급수력선류기기주요분리작용，제이급대우진일보강저저류함유질량분수기관건작용；입구류량화총분류비적조합위(120～140 m3·d-1/0.36～0.74)、(140～160 m3·d-1/0.31～0.77)혹(160～180 m3·d-1/0.33～0.76)시，저류함유질량분수불대우0.02%；수치모의예측적분류특성여시험결과일치，예측적총분류비화저류함유질량분수적관계여시험결과정성일치。통과종합분석분류특성화분리특성，득출진행정하공황조절시입구류량화총분류비적합리범위，위현장시험제공지도。
The operating characteristic of down dual-stage tandem oil-water separator is essential for the condition diagnosis and adjustment of downhole oil-water separation system. Based on algebraic slip mixture model(ASMM) and large eddy simulation(LES), related parameters and boundary conditions are set according to T228 well status to research the split and separation characteristics of down dual-stage tandem oil-water separator. And the numerical simulation results compared with the ground text results. The results show that:When the inlet flow rate is between 80 m3·d-1 and 200 m3·d-1, the range of total split ratio become larger and larger, and the variation relationship between the ratio of the first and second hydrocyclones’ overflow and the total split ratio is deterministic function, and the oil mass fraction of underflow decreases firstly and then increases with the increasing total split ratio; under the rated condition, the first hydrocyclone separates most of the oil and the second one plays a key role in further reducing the oil mass fraction of underflow; when the combinations of inlet flow rate and total split ratio are (120-140 m3·d-1/0.36-0.74), (140-160 m3·d-1/0.31-0.77) or (160-180 m3·d-1/0.33-0.76), the oil mass fraction of underflow is not more than 0.02%;the split characteristic predicted by numerical simulation is consistent with ground text result, while the relationship between the total split ratio and the oil mass fraction of underflow predicted by it is qualitatively consistent with ground text result. The reasonable ranges of inlet flow rate and total split ratio for the adjustment of downhole operating conditions are given through the comprehensive analysis of split and separation characteristics. It will provide guidance for field text.
