合水油田庄9区长8_(2)油层测井参数解释模型及储层评价下限标准  

Logging parameter interpretation model and the lower limit standard for reservoir evaluation of Chang 8_(2) reservoir in Zhuang 9 Well Block of Heshui Oilfield

作　　者：尹洪荣[1] 周虎[1] 何唯菁 蔡兴利[1] 淡卫东[3] 牛基宏 徐刚[1] 马文忠[3] YIN Hongrong;ZHOU Hu;HE Weijing;CAI Xingli;DAN Weidong;NIU Jihong;XU Gang;MA Wenzhong(Research Institute of Exploration and Development,Changqing Oilfield Company,PetroChina,Xi’an 710018,Shaanxi;No.11 Oil Production Plant,Changqing Oilfield Company,PetroChina,Qingyang 745100,Gansu;National Engineering Laboratory for Low-permeability Petroleum Exploration and Development,Xi’an 710018,Shaanxi)

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,陕西西安710018 [2]中国石油长庆油田分公司采油十一厂,甘肃庆阳745100 [3]低渗透油气田勘探开发国家工程实验室,陕西西安710018

出　　处：《长江大学学报（自然科学版）》2021年第2期36-41,共6页Journal of Yangtze University(Natural Science Edition)

基　　金：国家科技重大专项“鄂尔多斯盆地致密油资源潜力、甜点预测与关键技术应用”(2016ZX05046-005)。

摘　　要：致密油层具有储集孔隙空间小,渗流能力差,非均质性强,岩性、电性变化大,油水关系复杂、流体测井识别难度大等特点,如何有效利用测井资料评价该类油层,对油田的勘探、开发具有重要意义。以鄂尔多斯盆地合水油田庄9区致密油层长82油层为例,充分利用测井、取心、录井、测试分析等资料,建立了合水油田长82油层测井参数解释模型:研究区开发井密度曲线较少,选用声波时差建立了孔隙度解释模型;孔隙度与渗透率相关性较好,利用两者交会图法获得渗透率模型;采用阿尔奇公式计算得到研究区的含油饱和度解释模型。并确定了储层评价下限标准:渗透率下限为0.1mD,孔隙度下限为8.0%,声波时差下限为220μs/m,电阻率下限为20Ω·m,含油饱和度下限为45%。该模型及下限标准为研究区致密油层的识别、储量的提交与升级提供了依据,也为复杂致密储层的测井评价提供了借鉴。The tight reservoirs have the characteristics of small pore space,poor seepage capacity,strong heterogeneity,great changes in lithology and electrical properties,complex oil-water relationship,and great difficulty in fluid logging identification.How to effectively evaluate such reservoirs with logging data is of great significance to the exploration and development of the oilfield.Taking Chang 82 reservoir in Zhuang 9 Well Block of Heshui Oilfield of Ordos Basin as an example,a logging parameter interpretation model was established by making full use of the data of well logging,coring,logging,testing analysis,etc.In view of the few density curves of development wells in the study area,the interpretation model of porosity was established by using acoustic time difference.The permeability model was obtained by using the cross plot method of porosity and permeability.The interpretation model of oil saturation in the study area was calculated by Archie formula.And the lower limit standard of reservoir evaluation was determined as follows:the lower limit of permeability is 0.1mD,the lower limit of porosity is 8.0%,the lower limit of interval transit time is 220μs/m,the lower limit of electrical resistivity is 20Ω·m,and the lower limit of oil saturation is 45%.The model and the lower limit standard not only provide a basis for the identification of tight reservoirs,the submission and upgrading of reserves in the study area,but also provide reference for the well logging evaluation of complex tight reservoirs.

关 键 词：合水油田 长82油层 测井解释 储层参数下限标准 有效厚度划分 岩心刻度测井 

分 类 号：P631.84[天文地球—地质矿产勘探]