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作 者:冯弋秦 赵俊兴[1] 王冰[2] 冯强汉[2] 马超[3] 贺育超 苗如霖 FENG Yiqin;ZHAO Junxing;WANG Bing;FENG Qianghan;MA Chao;HE Yuchao;MIAO Rulin(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China;The 3 rd Gas Production Plant of Changqing Oilfield Company,Wushenqi 017300,China;Research Institute of Exploration and Development,SINOPEC North China Company,Zhengzhou 450006,China)
机构地区:[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059 [2]中国石油长庆油田分公司第三采气厂,内蒙古乌审旗017300 [3]中国石化华北分公司勘探开发研究院,郑州450006
出 处:《成都理工大学学报(自然科学版)》2020年第2期141-149,共9页Journal of Chengdu University of Technology: Science & Technology Edition
基 金:国家科技重大专项(2017ZX05036-004-006)。
摘 要:针对鄂尔多斯盆地定北地区二叠系下石盒子组第一段(简称"盒一段")致密砂岩储层物性差、测井识别与评价难度大的问题,以沉积相、储层岩性等为基础,利用岩心、测井等资料对盒一段的岩性、物性、电性和含油气性(简称"四性")关系特征进行研究,在此基础上选取自然伽马、声波时差、中子等电性资料建立起泥质含量、孔隙度和含气饱和度的测井解释模型,同时,利用图版交会法确定了储层有效物性下限和电性的有效下限分别为:孔隙度为4.5%,渗透率为0.201×10-3μm2,电阻率为20Ω·m,声波时差为198μs/m,含气饱和度为50%;有效上限为:密度为2.55g/cm3,泥质的质量分数为12%。确定了定北地区盒一段气层分类标准,认为成岩作用影响着储层发育进而影响着优质气层的规模。Drilling core and well logging data are used to study the characteristics and correlation of lithology,physical property,electric property and oil-gas possibility of tight sandstone reservoirs in the Member 1 of Lower Shihezi Formation(P1x1)in Dingbei Block of Ordos Basin.A well logging interpretation model for clay content,porosity and gas saturation is established on the basis of natural gamma,sonic interval transit time,neutron and other electrical data.Meanwhile,the lower limit of physical effective property and the lower limit of electrical properties are determined by chart intersection method.It shows that the effective lower limit of porosity is 4.5%,the permeability is0.201×10-3μm2,and the resistivity of the lower limit of resistivity is 20Ω·m,the sonic interval transit time is 198μs/m,gas saturation is 50%.In the upper limit of electrical efficiency,the density is 2.55 g/cm3 and the mass fraction of shale is 12%.The classification criteria of gas reservoir of P1x1 in the area are determined according to the newly proposed model.It is the diagenesis that affected the development and scale of quality gas reservoir.
关 键 词:鄂尔多斯盆地 下石盒子组 四性关系 有效下限 测井解释模型
分 类 号:TE122.23[石油与天然气工程—油气勘探]
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