大池干井、黄草峡构造嘉二~2储层预测研究
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摘要
在川东大池干井构造和黄草峡构造上, 池 57井、草 31井都在下三叠统嘉陵江组嘉二2 获得高产工业气流。嘉二2 岩性横向变化大、储层薄的特点给储层预测工作带来了极大的困难。为了搞清川东嘉二2 储层的地质、测井特征及其分布规律, 提出了用Strata速度反演与DCI密度约束反演联合识别川东嘉二2 薄储层的方法。通过对过池 57井、草 31井的两条地震测线做Strata速度反演和DCI密度反演, 分析结果显示, 两条测线的密度反演剖面能较好的反映了储层的横向变化, 且密度反演剖面要好于速度反演剖面, 与实际地质、测井情况更加吻合。由此可见, 将该方法应用于川东嘉二2 储层预测工作是可行的。
High-yield commercial gas flow has all been obtained in wells Zhi-57 and Cao-31 inT 1j 2 2 of Jialingjiang Formation, Lower Triassic in east Sichuan Dachiganjing and Huangcaoxia structures. The peculiarities of great transverse lithological variation and thin reservoir of T 1j 2 2 have brought maximum hardships to reservoir prediction. For the sake of clarifying the geological and logging characteristics and its distributive rules of east Sichuan T 1j 2 2 reservoir, the method of strata velocity inversion and DCI density constrained inversion to jointly recognize the east Sichuan T 1j 2 2 thin reservoir is raised. By using two seismic profiles in wells Zhi-57 and Cao-31 to implement Strata velocity inversion and DCI density inversion, the analytical results show that these two-profile density inversion sections can reflect the transverse variation of reservoir fairly well, and the density inversion section is better than that of velocity inversion, and it still more tallies with the actual situation of geology and logging. Thus it can be seen that applying this method to the prediction of east Sichuan T 1j 2 2 reservoir is feasible.
High-yield commercial gas flow has all been obtained in wells Zhi-57 and Cao-31 inT 1j 2 2 of Jialingjiang Formation, Lower Triassic in east Sichuan Dachiganjing and Huangcaoxia structures. The peculiarities of great transverse lithological variation and thin reservoir of T 1j 2 2 have brought maximum hardships to reservoir prediction. For the sake of clarifying the geological and logging characteristics and its distributive rules of east Sichuan T 1j 2 2 reservoir, the method of strata velocity inversion and DCI density constrained inversion to jointly recognize the east Sichuan T 1j 2 2 thin reservoir is raised. By using two seismic profiles in wells Zhi-57 and Cao-31 to implement Strata velocity inversion and DCI density inversion, the analytical results show that these two-profile density inversion sections can reflect the transverse variation of reservoir fairly well, and the density inversion section is better than that of velocity inversion, and it still more tallies with the actual situation of geology and logging. Thus it can be seen that applying this method to the prediction of east Sichuan T 1j 2 2 reservoir is feasible.
引文
1 黄平川东石炭系储层预测及岩性圈闭识别探索性研究中油西南油气田分公司勘探开发研究院课题报告1998
2 黄平Jason和Strata技术在川东北飞仙关组储层预测研究中的应用中油西南油气田分公司勘探开发研究院课题报告2002
2 黄平Jason和Strata技术在川东北飞仙关组储层预测研究中的应用中油西南油气田分公司勘探开发研究院课题报告2002
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