二连盆地中小型断陷扇体地震储层预测技术研究
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摘要
二连盆地发育数以百计的中小型晚中生代断陷沉积湖盆群。其有利储层主要为扇三角洲砂砾岩、湖底扇细砂岩等,由于湖盆面积小、水体浅、连通差及干旱气候影响,各凹陷地层碳酸盐岩含量普遍较高,储层较致密。储层岩性、物性等特征参数严重制约了勘探成效,储层预测变得更为重要。大多数情况下,声波曲线可以识别粗碎屑储层并且能够反映储层物性好坏,因此,采用分块分段声阻抗反演、孔隙度储层参数反演及振幅属性预测扇体空间展布规律及物性特征效果。以上技术方法在二连盆地巴音都兰、阿南、乌兰花等多个凹陷开展应用,取得了较好勘探成果和应用效果。
There exist hundreds of small or meddle fault sedimentary depressions in Lower Cretaceous of Mesozoic in Erlian Basin.Sandy gravel in fan deltas and fine sandstone in sublacustrine fan are the favorable reservoirs.Because the lakes are small and shallow and obstructed by arid climate.The content of the carbonate is high and the lithology is compact in the reservoir.The effect of exploration is restricted by the characteristic parameters such as lithology and permeability.So predicting reservoir is important.Mostly,the AC curve could distinguish the coarse clastic rocks and reflect permeability of the reservoir.So It is conducive to predicting reservoir to adopt original divisive impedance inversion and reservoir porosity parameter inversion and amplitude attribute.Through the application practically of these technology and methods in Bayindulan and Anan and Wulanhua Depressions in Erlan Basin,good results are achieved.
There exist hundreds of small or meddle fault sedimentary depressions in Lower Cretaceous of Mesozoic in Erlian Basin.Sandy gravel in fan deltas and fine sandstone in sublacustrine fan are the favorable reservoirs.Because the lakes are small and shallow and obstructed by arid climate.The content of the carbonate is high and the lithology is compact in the reservoir.The effect of exploration is restricted by the characteristic parameters such as lithology and permeability.So predicting reservoir is important.Mostly,the AC curve could distinguish the coarse clastic rocks and reflect permeability of the reservoir.So It is conducive to predicting reservoir to adopt original divisive impedance inversion and reservoir porosity parameter inversion and amplitude attribute.Through the application practically of these technology and methods in Bayindulan and Anan and Wulanhua Depressions in Erlan Basin,good results are achieved.
引文
[1]李庆忠,走向精确勘探的道路[M].北京,石油工业出版社,1993:12-20.
[2]沈财余,崔汝国.影响测井约束地震反演地质效果因素的分析[J].物探与化探,2003,27(2):123-127.
[3]王捷.油藏描述技术——勘探阶段[M].北京:石油工业出版社,1996:160-165.
[4]宋维琪.应用地震属性与测井数据反演储层参数[J].勘探地球物理进展,2003,26(3):216-219.
[2]沈财余,崔汝国.影响测井约束地震反演地质效果因素的分析[J].物探与化探,2003,27(2):123-127.
[3]王捷.油藏描述技术——勘探阶段[M].北京:石油工业出版社,1996:160-165.
[4]宋维琪.应用地震属性与测井数据反演储层参数[J].勘探地球物理进展,2003,26(3):216-219.
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