任　婷，漆万珍，曹红霞，王　凯

(陕西延长石油(集团)有限责任公司研究院，陕西西安 710075)

鄂尔多斯盆地延长东区上古生界储层“四性”关系研究

任婷，漆万珍，曹红霞，王凯

(陕西延长石油(集团)有限责任公司研究院，陕西西安 710075)

摘要：储层“四性”关系研究是有效储层定量评价、气藏特征及储量计算的基础。通过对鄂尔多斯盆地延长东区薄片鉴定资料、压汞资料、岩心物性分析资料、试气资料和测井资料等的收集、统计、分析，对研究区储层“四性”关系和有效储层特征进行研究，认为储层的岩性、物性、电性和含气性之间具有良好的相关性，岩性和物性反映了气藏的富集程度，电性则是岩性、物性、含气性的综合反映。经验统计法和密闭取心含水饱和法是确定储层物性下限最基本的两种方法，据此判断出上古生界盒8段、山1段、山2段和本溪组孔隙度下限依次为5%、4%、3%和3%，渗透率下限均为0.06mD，利用深感应电阻率与孔隙度、饱和度交会图确定电性下限，其中电阻率下限依次为50Ω·m、45Ω·m、45Ω·m和23Ω·m，声波时差下限依次为217μs/m、195μs/m、191μs/m和190μs/m，为储量计算提供了依据，对储层的综合评价和该区开发部署具有指导作用。

关键词：鄂尔多斯盆地；延长东区；上古生界；“四性”关系；有效储层下限

Four-properties Relationship of Upper Paleozoic Reservoir in

Yanchang East，Ordos Basin

Ren Ting, Qi Wanzhen, Cao Hongxia, Wang Kai

(ResearchInstituteofShaanxiYanchangPeteoleum(Group)Co.,Ltd.,Xi’an,Shaanxi,710075,China)

Abstract:Research on the relationship of four-properties of reservoir is the basis for quantitative evaluation of effective reservoir, gas reservoir characteristics and reserve calculation. Through the collection, statistics and analysis of slice identification, mercury, core properties, test gas and logging data of the Yanchang east area in Ordos Basin, we studied the effective reservoir characteristics of the study area, analyzed of four properties relationship of the study area, and got a conclusion that the lithology, properties, electrical and gas properties have good correlation , lithology and properties controlled enrichment of gas reservoirs, electrical properties is a comprehensive reflection of lithology, properties and gas-properties. Experience statistics and sealed coring water saturation are two basic methods to determine reservoir properties limit, we found that the lower limit of the effective reservoir, the porosity lower limit value of he8,shan1,shan2 and benxi formation of Upper Paleozoic is 5%, 4%, 3% and 3%, the permeability lower limit value is 0.06mD.The intersection map of deep induction resistivity values and the porosity, saturation is used to determine the electrical limit: the resistivity lower limit value is 50Ω·m,45Ω·m,45Ω·m and 23Ω·m, the interval transit time lower limit value is 217μs/m,195μs/m,191μs/m and 190μs/m,provides the basis for reserve calculation, and plays a guiding role in the comprehensive evaluation of reservoir, development and deployment in this area.

Key words:Ordos Basin, Yanchang east, upper paleozoic, four properties relationship, lower limits of effective reservoir

延长气田位于鄂尔多斯盆地伊陕斜坡的东南部。研究区位于延长气田的东南部，区内有延河流经，面积约为3700km2以上。研究区钻遇地层自上而下发育：第四系，白垩系志丹群，侏罗系安定组、直罗组、延安组、富县组，三叠系延长组、纸纺组、和尚沟组、刘家沟组，二叠系石千峰组、石盒子组、山西组，太原组，石炭系本溪组和奥陶系马家沟组。……