普光气田飞仙关组鲕滩白云岩储层预测
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摘要
普光气田下三叠统飞仙关组鲕滩白云岩储层在晚燕山期到晚喜马拉雅期被多期次"跷跷板"式的构造活动复杂化,地层厚度大但分布不均,储层物性好但横向变化快,储层预测难度大。在对三维地震资料进行精细解释的基础上,结合实钻测井资料,应用岩石物理特征分析、地质建模、正演模拟、地震相划分、地震属性叠合分析、波阻抗反演、吸收系数等地球物理技术,对飞仙关组鲕滩白云岩储层的展布以及物性特征进行预测。预测结果显示,在普光气田的普光2井区飞仙关组鲕滩白云岩厚度最大,以I类和II类储层为主;大湾井区厚度相对有所减薄,主要以II类储层为主;毛坝4井区厚度比较均一,储层物性普遍较好。
The oolite and shoal dolomite reservoir of Feixianguan group Puguang gas field is complicated by frequent teeter-totter tectonic movements within the later period of Yan Mountain and Himalaya Mountain. The stratum is thick but varied in different places. The property of reservoir is good but it changes rapidly on plan. It makes the work of trap description focusing on the reservoir forecast very hard. Based on the analysis of 3D seismic data and the drilling and logging data, the analysis of rock physical character, geology modeling, forward modeling, seismic facies division, the analysis of seismic property, wave impedance inversion, absorption coefficient and etc are applied to forecast the oolite and shoal dolomite reservoir of Feixianguan group in terms of distribution and physical property. According to the forecast result, it displays that the oolite and shoal dolomite reservoir of Feixianguan group is thickest in the No. 2 block of Puguang gas field. The main reservoirs are category I and category Ⅱ. Compare with No. 2 block, the reservoir of Dawan block is thin. It's homogeneous in the Maoba No. 4 wells area and the property is better.
The oolite and shoal dolomite reservoir of Feixianguan group Puguang gas field is complicated by frequent teeter-totter tectonic movements within the later period of Yan Mountain and Himalaya Mountain. The stratum is thick but varied in different places. The property of reservoir is good but it changes rapidly on plan. It makes the work of trap description focusing on the reservoir forecast very hard. Based on the analysis of 3D seismic data and the drilling and logging data, the analysis of rock physical character, geology modeling, forward modeling, seismic facies division, the analysis of seismic property, wave impedance inversion, absorption coefficient and etc are applied to forecast the oolite and shoal dolomite reservoir of Feixianguan group in terms of distribution and physical property. According to the forecast result, it displays that the oolite and shoal dolomite reservoir of Feixianguan group is thickest in the No. 2 block of Puguang gas field. The main reservoirs are category I and category Ⅱ. Compare with No. 2 block, the reservoir of Dawan block is thin. It's homogeneous in the Maoba No. 4 wells area and the property is better.
引文
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[4]陈祖庆,杨鸿飞,王涛.川东北宣汉-达县地区礁滩相储层地震预测研究[J].南方油气,2005,18(4):3-36.
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[9]毕俊凤.地震多属性加权融合显示技术在宣汉—达县地区的应用[J].油气地质与采收率,2008,15(2):75-77.
[10]马永生,郭旭升,凡睿.川东北普光气田飞仙关组鲕滩储集层预测[J].石油勘探与开发,2005,32(4):60-65.
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