鄂尔多斯盆地大牛地气田三维储层精细描述
|
摘要
下二叠统下石盒子组是大牛地气田低孔、低渗透岩性气藏的主要产气层之一,分析其储层的非均质性,精细描述储层的各种属性特征,是气田进一步开发的关键。为此,综合利用地质、地震、测井等各种资料,应用三维随机建模技术,根据两步法建模理论和地质统计结果,采用地震、沉积模式控制等多信息融合约束的建模方法,建立了研究区储层的沉积微相模型,精细描述了下石盒子组辫状河沉积特征,剖析了各沉积微相砂体的展布形态与叠置关系;依据相控建模方法,分析各微相下的属性分布特征,统计属性分布变密度函数,以已经建成的沉积微相模型为基础,完成各属性的随机模型,分级、分层次详细地描述储层的非均质性,并指出心滩沉积的粗砂岩、砂砾岩等为相对高孔、高渗带,是主要的产气砂体。
The Early Permian lower Shihezi Formation is one of the major payzones in the lithologic gas reservoirs with low porosity and low permeability in the Daniudi gas field,Ordos Basin.Analysis of the heterogeneity and fine description of the attributes of the reservoirs are critical to further development of this gas field.Taking all available data sources into account,we adopted the 3D stochastic modelling to built sedimentary micro-facies models for the reservoirs in the study area,described in detail the characteristics of braided river deposits in the lower Shihezi Formation,and analyzed the distribution and superimposition of sandbodies of various sedimentary micro-facies.By using the facies-controlled modeling method,we analyzed the characteristics of attribute distribution of each sedimentary micro-facies,performed statistics of variable density function of the attribute distribution,built a stochastic model for each attribute based on the sedimentary micro-facies models,and described in detail the reservoir heterogeneity.It is believed that the griststone and glutinite in channel bar deposits contribute to potential payzones because of their relatively high porosity and permeability.
The Early Permian lower Shihezi Formation is one of the major payzones in the lithologic gas reservoirs with low porosity and low permeability in the Daniudi gas field,Ordos Basin.Analysis of the heterogeneity and fine description of the attributes of the reservoirs are critical to further development of this gas field.Taking all available data sources into account,we adopted the 3D stochastic modelling to built sedimentary micro-facies models for the reservoirs in the study area,described in detail the characteristics of braided river deposits in the lower Shihezi Formation,and analyzed the distribution and superimposition of sandbodies of various sedimentary micro-facies.By using the facies-controlled modeling method,we analyzed the characteristics of attribute distribution of each sedimentary micro-facies,performed statistics of variable density function of the attribute distribution,built a stochastic model for each attribute based on the sedimentary micro-facies models,and described in detail the reservoir heterogeneity.It is believed that the griststone and glutinite in channel bar deposits contribute to potential payzones because of their relatively high porosity and permeability.
引文
[1]陈利雯,赵永刚,李保华,等.储层综合特征参数预测大牛地气田盒3段产能[J].天然气工业,2009,29(6):46-48.
[2]曹忠辉.鄂尔多斯盆地大牛地复式气田基本地质特征[J].西南石油学院学报,2005,27(2):17-21.
[3]郝蜀民,惠宽洋,李良,等.鄂尔多斯盆地大牛地大型低渗气田成藏特征及其勘探开发技术[J].石油与天然气地质,2006,27(6):762-768.
[4]张卫华.大牛地气田盒3段富气储层反射模型及预测[J].天然气工业,2009,29(4):33-35.
[5]谭学群.大牛地气田井间二次约束的储层建模方法[J].天然气工业,2007,27(12):46-48.
[6]吴胜和,张一伟,李恕军,等.提高储层随机建模精度的地质约束原则[J].石油大学学报:自然科学版,2001,43(1):55-58.
[7]练章贵,卞万江,刘加元,等.油气藏数模前后处理软件开发与应用[J].西南石油学院学报,2005,27(3):34-36.
[2]曹忠辉.鄂尔多斯盆地大牛地复式气田基本地质特征[J].西南石油学院学报,2005,27(2):17-21.
[3]郝蜀民,惠宽洋,李良,等.鄂尔多斯盆地大牛地大型低渗气田成藏特征及其勘探开发技术[J].石油与天然气地质,2006,27(6):762-768.
[4]张卫华.大牛地气田盒3段富气储层反射模型及预测[J].天然气工业,2009,29(4):33-35.
[5]谭学群.大牛地气田井间二次约束的储层建模方法[J].天然气工业,2007,27(12):46-48.
[6]吴胜和,张一伟,李恕军,等.提高储层随机建模精度的地质约束原则[J].石油大学学报:自然科学版,2001,43(1):55-58.
[7]练章贵,卞万江,刘加元,等.油气藏数模前后处理软件开发与应用[J].西南石油学院学报,2005,27(3):34-36.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心