摘要
南堡凹陷是冀东油田主要的油气产区,而东营组是其主要生产层位之一。近年来,随着勘探程度的深入,勘探难度不断增大,钻井提速导致岩屑破碎严重,岩屑代表性逐渐变差,而钻井液工艺的提升使得岩屑受到污染,导致含油显示识别困难,同时由于东营组埋深较浅,受地层水、地层压力等地质因素影响较大,存在大量的低阻、低气测异常层和剩余油储层,给录井解释评价工作带来了困难。为解决这些难题,通过统计南堡凹陷东营组的气测、地化、轻烃等录井技术资料和试油资料,分析录井参数特征,形成了地化含油丰度参数Po和轻烃含水参数Qw,建立了适合南堡凹陷东营组的录井解释评价方法。利用新建立的解释评价方法在冀东油田南堡凹陷进行了29口预探井的现场应用,共试油31层,符合25层,解释符合率为80.6%,有效解决了冀东南堡凹陷东营组流体性质识别困难的难题。
Nanpu Sag is the main oil and gas producing area of Jidong Oilfield,and Dongying Formation is one of its main producing horizons.In recent years,with the deepening of exploration,the exploration difficulty has been increasing.Increasing rate of penetration leads to serious cuttings fragmentation,cuttings become progressively less representative,improvements in drilling fluid technology have contaminated cuttings,making it difficult to identify oil-bearing show.At the same time,due to the shallow buried depth of Dongying Formation and the great influence by geofactors such as formation water and formation pressure,there are a large number of low resistivity and low gas logging abnormal layers and remaining oil reservoirs,which bring difficulties to mud logging interpretation and evaluation.In order to solve these problems,through the statistics of gas logging,geochemistry,light hydrocarbon and other mud logging technical data and oil testing data of Dongying Formation in Nanpu Sag,the characteristics of mud logging parameters are analyzed,geochemical oil abundance parameter Po and light hydrocarbon water cut parameter Qw are formed,and mud logging interpretation and evaluation method suitable for Dongying Formation in Nanpu Sag is established.The newly established interpretation and evaluation method is applied to 29 preliminary prospecting wells in Nanpu Sag of Jidong Oilfield,with a total of 31 layers of oil testing,consistent with 25 layers,the interpretation coincidence rate is 80.6%,which effectively solves the difficulty of fluid property identification of Dongying Formation in Nanpu Sag,Jidong Oilfield.
作者
赵文睿
ZHAO Wenrui(Exploration Development and Construction Engineering Division of PetroChina Jidong Oilfield Company, Tangshan, Hebei 063200, China)
出处
《录井工程》
2021年第4期73-78,共6页
Mud Logging Engineering
关键词
南堡凹陷
东营组
录井技术
解释评价
气测
地化
轻烃
Nanpu Sag
Dongying Formation
mud logging technology
interpretation and evaluation
gas logging
geochemistry
light hydrocarbons
