录井三维解释模型在阜东石炭系应用研究

Application of mud logging three-dimensional interpretation model in Carboniferous system of Fudong slope belt

为提高阜东斜坡带北三台凸起石炭系储集层解释符合率,对能反映储集层含油性的气测、地化参数,能反映物性的功指数参数进行研究,找出敏感参数通过单因素方差分析,运用费歇尔计算判别函数,得到融合了热解、气测、功指数的组合参数FRQW,并应用优选出的组合参数、功指数、气测能量系数建立了三维立体解释评价模型。首次用三维立体视角,形成一个空间概念交会图,其在新近完钻的部分井进行了应用,解释符合率达到83.3%。该三维模型较传统二维解释模型优势明显,进一步解决了复杂岩性地层流体识别困难的瓶颈问题。

The fluid properties of Carboniferous reservoirs in Beisantai bump salience of Fudong slope belt are complex and difficult to explain.To improve the interpretation coincidencerate,the authors studied the effective parameters of gas logging and geochemistry which can reflect the oil bearing property of the reservoirs,and the work index parameters which can reflect physical property,and found out the sensitive parameter differential pressure,work index ratio,water content factor,hydrocarbon phase coefficient,gas logging energy c oefficient,etc.Through single factor analysis of variances and using Fisher calculation discriminant function,the combined parameter(FRQW)of pyrolysis,gas logging and work index was obtained.The three-dimensional interpretation model and evaluation method were established by using the optimized combination parameter,work index and gas logging energy coefficient.For the first time,a spatial conceptual crossplot was formed from three-dimensional stereo vision.It has been applied in some newly drilled wells,and the coincidence rate is 83.3 %.The effects are good.Compared with the traditional two-dimensional interpretation model,the three-dimensional model has obvious advantages and further solves the bottleneck problem of fluid identification in complex lithologic formations.The ideas of constructing the model can provide reference for data interpretation of other blocks and identification of oil and water layers.