井筒内气液两相流流型对气测数据影响规律的实验分析  

Experimental analysis of flow pattern influence law of gas⁃liquid two⁃phase flow in wellbores on gas logging data

作　　者：孙红华 吴颖 范伟 张明扬 于伟高 胡曼 SUN Honghua;WU Ying;FAN Wei;ZHANG Mingyang;YU Weigao;HU Man(No.2 Mud Logging Company,BHDC,CNPC,Renqiu,Hebei 062550,China;Exploration Enterprise of PetroChina Huabei Oilfield Company,Renqiu,Hebei 062550,China)

机构地区：[1]中国石油渤海钻探第二录井公司 [2]中国石油华北油田公司勘探事业部

出　　处：《录井工程》2024年第2期15-21,共7页Mud Logging Engineering

摘　　要：气测录井技术是目前钻探现场快速、准确判断油气层的重要方法之一,但气测数据受影响因素众多,导致气测录井数据的准确性有所降低。现阶段已有很多针对气测数据影响因素的研究,但鲜有井筒内气液两相流流型变化对气测数据影响的研究。为此,专门设计了一种利用螺旋管代替直管的气测实验装置,并验证了该实验装置的可行性;然后,基于Fluent软件建立了与气测实验装置相同参数的螺旋管数值模型,并据此模型给出了气测实验中各流型(泡状流、弹状流、段塞流、环状流和雾状流)的产生条件;最后,基于气测实验装置及各流型产生条件,开展了气液两相流流型变化对气测影响的实验。结果表明(:1)全烃检测值随流型变化(泡状流→弹状流→段塞流→环状流→雾状流)而增大,且不同流型转变引起的全烃检测值变化仍有较大差异(;2)不同流型下全烃检测值均随钻井液密度增大而减小,且钻井液密度对气测数据的影响程度随流型变化而降低(;3)不同流型下全烃检测值均随钻井液粘度增大而先增大后减小,且钻井液粘度对气测数据的影响灵敏度随流型变化而降低。通过研究气液两相流流型对气测数据的影响,进一步提高了气测录井数据的校正精度。Gas logging technology is currently one of the important methods for quickly and accurately judging hydrocarbon reservoirs in drilling sites.However,gas logging data is affected by many factors,resulting in a decrease in the accuracy of gas logging data.At present,there have been many studies on the influence factors of gas logging data,but few studies on the influence of flow pattern changes in gas⁃liquid two⁃phase flow in the wellbores on gas logging data.Therefore,a gas logging experimental apparatus using spiral pipe instead of straight pipe is specially designed,and the feasibility of this experimental apparatus is verified.Then,based on Fluent software,a spiral pipe numerical model with the same parameters as the gas logging experimental apparatus is established.And based on this model,the generation conditions of various flow patterns(bubbly flow,slug flow,piston flow,annular flow,and mist flow)in gas logging experiment are provided.Finally,based on the experimental apparatus of gas logging and the generation conditions of each flow pattern,the experiment is carried out for the influence of flow pattern changes in gas⁃liquid two⁃phase flow on gas logging.The results are obtained in three aspects.First,the total hydrocarbon detection values increase with the flow patterns(bubble flow→slug flow→piston flow→annular flow→mist flow),and there are still significant differences in the total hydrocarbon detection value changes caused by different flow pattern transitions.Second,the total hydrocarbon detection values under different flow patterns decrease with the increase of drilling fluid density,and the degree of influence of drilling fluid density on gas logging data decreases with the changes of flow patterns.Third,the total hydrocarbon detection values under different flow patterns all increase first and then decrease with the increase of drilling fluid viscosity,and the sensitivity of the influence of drilling fluid viscosity on gas logging data decreases with the changes of flow patterns.By

关 键 词：气液两相流 流型 FLUENT 气测数据 螺旋管 影响规律 

分 类 号：TE132.1[石油与天然气工程—油气勘探]