邛西构造须二段致密砂岩储层预测技术研究
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摘要
川西前陆盆地上三叠统须家河组须二段属低孔、低渗裂缝—孔隙型块状砂岩储层 ,是该区域的主力气层。针对这一致密砂岩储层的特点 ,以岩心资料为基础 ,通过地震、测井响应特征研究 ,建立了储层的地震模型。文章重点介绍GRIstation地震属性分析技术和COMPAK烃类检测定性预测技术预测含气砂体有利区、SEIMPAR测井多参数反演的自然伽马反演定量预测砂层厚度、HARI和GEOsmart精细波阻抗反演技术定量预测含气砂层等 ,从而形成了一套由定性识别到定量判识的综合预测技术。采用该套技术部署的邛西 4井在须二段获高产气流 ,2 0 0 3年新增天然气控制储量 2 0 0× 10 8m3 以上 ,应用成效显著
The second member of Xujiahe Formation,Upper Triassic(T 3x 2)in West Sichuan Foreland Basin belongs in low-porosity,low-permeability,fracture-pore type,massive sandstone reservoirs and it is the major gas-bearing formation in this region.In light of the tight sandstone reservoir features and on the basis of core data,a reservoir seismic model was set up through the research on the seismic and logging response characteristics.The following reservoir prediction techniques,i.e.applying the GRistation seismic attribute analysis and COMPAK hydrocarbon detection to predicting qualitatively gas-bearing sandbody beneficial areas,the SEIPAR logging multiparameter natural gamma inversion to predicting quantitatively sand thicks and the HARI and GEOsmart fine wave impedance inversion to predicting quantitatively gas-bearing sands,etc.,are emphatically introduced in the paper,thus forming a set of comprehensive prediction techniques from qualitative discernment to quantitative judgement.The high produtivity gas flow was obtained from T 3x 2 in well Qiongxi—4 deployed by use of such a set of techniques and the controlled gas reserves increased by 20×10 9m 3 in 2003,so that the applied results are satisfactory.
The second member of Xujiahe Formation,Upper Triassic(T 3x 2)in West Sichuan Foreland Basin belongs in low-porosity,low-permeability,fracture-pore type,massive sandstone reservoirs and it is the major gas-bearing formation in this region.In light of the tight sandstone reservoir features and on the basis of core data,a reservoir seismic model was set up through the research on the seismic and logging response characteristics.The following reservoir prediction techniques,i.e.applying the GRistation seismic attribute analysis and COMPAK hydrocarbon detection to predicting qualitatively gas-bearing sandbody beneficial areas,the SEIPAR logging multiparameter natural gamma inversion to predicting quantitatively sand thicks and the HARI and GEOsmart fine wave impedance inversion to predicting quantitatively gas-bearing sands,etc.,are emphatically introduced in the paper,thus forming a set of comprehensive prediction techniques from qualitative discernment to quantitative judgement.The high produtivity gas flow was obtained from T 3x 2 in well Qiongxi—4 deployed by use of such a set of techniques and the controlled gas reserves increased by 20×10 9m 3 in 2003,so that the applied results are satisfactory.
引文
1 李跃纲,杨跃明.川西白马庙气田蓬莱镇组气藏地震储层预测技术研究.天然气工业,2002;22(1)
2 徐伯勋等.地震勘探信息技术.北京:地质出版社,2001
3 祁少云.地震反演译文集.北京:石油工业出版社,1992
2 徐伯勋等.地震勘探信息技术.北京:地质出版社,2001
3 祁少云.地震反演译文集.北京:石油工业出版社,1992
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