顺北油气田气测解释图版研究及应用  

Gas logging interpretation chart and its application to Shunbei field

作　　者：杨旭东 YANG Xudong(Xinan Geosteering&Logging Company,Sinopec Matrix Corporation,Chengdu,Sichuan 610100,China)

机构地区：[1]中国石化经纬有限公司西南测控分公司,四川成都610100

出　　处：《天然气技术与经济》2025年第1期6-12,49,共8页Natural Gas Technology and Economy

摘　　要：为了解决塔里木盆地顺北油气田现有气测图版(三角图版、3H图版、比值图版、对数图版)对油气显示的解释结论相互矛盾且与完井测试结果差异较大的问题,在勘探开发过程中,快速评价油气显示,以顺北油气田157口已钻井为研究对象,汇总并筛选了部分井录井显示、完井测试结果等数据,分析了天然气在地层中的存在形式差异、各组分在水中及原油中的溶解析出差异及综合录井仪气相色谱分析原理,确定了湿度系数与油水分离系数两项识别参数,建立交会图版,在顺北油气田28口新钻井试用中取得了较好的效果。研究结果表明:①全烃与组分虽为两套分析系统,但通过各组分摩尔质量可以计算出其在全烃中的占比;②湿度系数可以较好地使气层与油层、水层在图版中分离,并相对集中,油水分离系数可以使水层与油层在图版中明显分离并相对集中。结论认为,通过全烃与各组分之和的差值可以定性地反映流体中重组分含量;②利用湿度系数与油水分离系数两项识别参数作为图版的纵轴与横轴建立图版,可以较好地识别顺北油气田的流体性质。There are two problems appeared in four gas logging charts(triangle,3H,specific value,and logarithmic charts)which are currently used in Shunbei field,for example inconsistent conclusions interpreted on oil and gas show,and great difference among completing test results.Thus,taken 157 wells in this field as examples,some data on mud-logging dis-play and completing test information in some of the wells were gathered together and then selected to analyze the diversity in the occurrence of natural gas in reservoirs,the difference in the dissolution and precipitation of various component in water and crude oil,and the gas chromatography principle of composite logging instrument.In addition,two identifying pa-rameters of humidity and oil-water separation coefficient were determined,and a crossplot chart was also developed.Better endings have been achieved in the trial of 28 wells newly drilled in this field.Results show that(i)the proportion of each component in total hydrocarbon can be calculated according to its molar mass even though total hydrocarbon and compo-nent are attached to different analysis systems;and(ii)the humidity can effectively separate a gas layer from oil or water layers in the chart,while the separation coefficient can obviously separate a water layer from an oil layer in the chart.In conclusion,the difference between total hydrocarbon and the sum of each component can qualitatively reflect the content of heavy component in the fluid.What's more,the chart with the humidity as the vertical axis and the separation coefficient as the horizontal axis can better discriminate fluid properties in Shunbei field.

关 键 词：顺北油气田 气测解释 油水分离系数 湿度系数 交会图版 

分 类 号：TE142[石油与天然气工程—油气勘探]