川中地区震旦系灯影组白云岩储层成像孔隙度分布谱响应特征研究
|
摘要
四川盆地震旦系灯影组(Z2dn)白云岩地层较致密,非均质性和各向异性强,导致储层有效性评价比较困难。结合岩心资料和成像测井资料,研究了川中地区Z2dn不同孔隙类型的储层在成像测井资料孔隙度分布谱上的响应特征。研究表明,不同孔隙类型的储层在成像测井资料孔隙度分布谱上的响应特征不同,地层中主要发育原生孔隙时,成像孔隙度分布谱上显示为靠左的单峰,峰形尖细且窄;地层中原生孔隙与次生孔隙都发育时,成像孔隙度分布谱上显示为双峰,左峰表达原生孔隙,右峰表达次生孔隙;地层中主要发育次生孔隙时,成像孔隙度分布谱上显示为靠右的单峰,峰形较宽且拖尾现象明显;据此可定性评价储层有效性。
It was difficult to evaluate dolomite reservoirs in Dengying Formation of Sinian system in Sichuan Basin due to its compactibility and anisotropy.Spectral response features of reservoirs with different pore types of Dengying Formation(Z 2 dn) in Sinian system of the central Sichuan Area were studied by using data of cores and FMI.The research demonstrates that different types of pores have different responses on the porosity spectrum,when the primary pores are well developed in the formation,the corresponding porosity spectrum shows a single narrow peak on the left;when the secondary pores are developed,there is a single and wide tailing peak on the right of the porosity spectrum;when both the primary pore and secondary pore are developed,single narrow peak is on the left and wide tailing peak is on the right on the porosity spectrum.The porosity spectrum is confirmed to be an effective way to evaluate the validity of reservoir in the study.
It was difficult to evaluate dolomite reservoirs in Dengying Formation of Sinian system in Sichuan Basin due to its compactibility and anisotropy.Spectral response features of reservoirs with different pore types of Dengying Formation(Z 2 dn) in Sinian system of the central Sichuan Area were studied by using data of cores and FMI.The research demonstrates that different types of pores have different responses on the porosity spectrum,when the primary pores are well developed in the formation,the corresponding porosity spectrum shows a single narrow peak on the left;when the secondary pores are developed,there is a single and wide tailing peak on the right of the porosity spectrum;when both the primary pore and secondary pore are developed,single narrow peak is on the left and wide tailing peak is on the right on the porosity spectrum.The porosity spectrum is confirmed to be an effective way to evaluate the validity of reservoir in the study.
引文
[1]刘树根,马永生,黄文明,等.四川盆地上震旦统灯影组储集层致密化过程研究[J].天然气地球科学,2007,18(4):485～496.
[2]包茨.天然气地质学[M].北京:科学出版社,1988.
[3]张志敬.四川盆地震旦系灯影组储层特征及其形成机理研究[D].成都:成都理工大学,2010.7～50.
[4]谢冰,周肖,唐雪萍,等.四川盆地龙岗地区礁滩型储层有效性评价[J].天然气工业,2011,31(7):28～31.
[5]童亨茂.成像测井资料在构造裂缝预测和评价中的应用[J].天然气工业,2006,26(9):58～61.
[6]刘之的,戴诗华,王洪亮,等.火成岩裂缝有效性测井评价[J].西南石油大学学报,2008,30(2):66～68.
[7]Liu R L,Li N,Feng Q F,et al.Application of the tripe porosity model in well-log effectiveness estimation of carbonate in Tarim Oil-field[J].Journal of Petroleum Science and Engineering,2009,68(1-2):40～46.
[8]吴兴能,刘瑞林.电成像测井资料变换为孔隙度分布图像的研究[J].测井技术,2008,32(1):53～56.
[2]包茨.天然气地质学[M].北京:科学出版社,1988.
[3]张志敬.四川盆地震旦系灯影组储层特征及其形成机理研究[D].成都:成都理工大学,2010.7～50.
[4]谢冰,周肖,唐雪萍,等.四川盆地龙岗地区礁滩型储层有效性评价[J].天然气工业,2011,31(7):28～31.
[5]童亨茂.成像测井资料在构造裂缝预测和评价中的应用[J].天然气工业,2006,26(9):58～61.
[6]刘之的,戴诗华,王洪亮,等.火成岩裂缝有效性测井评价[J].西南石油大学学报,2008,30(2):66～68.
[7]Liu R L,Li N,Feng Q F,et al.Application of the tripe porosity model in well-log effectiveness estimation of carbonate in Tarim Oil-field[J].Journal of Petroleum Science and Engineering,2009,68(1-2):40～46.
[8]吴兴能,刘瑞林.电成像测井资料变换为孔隙度分布图像的研究[J].测井技术,2008,32(1):53～56.
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