地震重构反演在大庆长垣剩余油预测中的应用
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摘要
在大庆长垣G地区P油层重构反演中,利用波阻抗的低频分量和自然电位的高频分量,融合、重构了拟波阻抗曲线,开展了约束稀疏脉冲反演、特征参数重构反演以及反演后处理工作,拓宽了地震频带的重构反演方法,极大提高了地震反演的分辨率,较好地界定了砂体对接关系及其储层空间展布特征。研究结果表明:纵向上不仅能够识别出大于5 m的厚砂层,而且能够识别出约2 m的薄砂层;砂体呈窄条带状断续分布。研究区储层平面、层间矛盾突出,不同相带吸水变化较大,间歇性吸水,甚至不吸水,数值模拟研究表明,剩余油主要集中在油田边部储层及井间河道砂。该研究充分挖掘了地震资料的潜力,对已开发油田的构造和储层进行了再认识,进一步落实了储层分布特征和剩余油潜力。
This paper reconstructs the pseudo-acoustic curve by fusing the low-requency component of wave impedance curves and the high frequency components of spontaneous potential and taking the reconstruction inversion of P reservoir in G Area of Daqing Placanticline as an example.The constrained sparse spike inversion,the characteristic parameter reconstruction inversion and the processing after inversion are carried out.By broadening the reconstruction of seismic frequency band inversion method,the resolution of the seismic inversion can be improved,the docking relationship of sand body and its distributing feature of the reservoir space are better defined.Study results show that the sandstone more than 5 m and the thin sandstone about 2 m can be cognized longitudinally.Sand body is in narrow banded and distributes discretely,so the heterogeneity becomes more prominent in the plane and interlayer.Water absorption greatly changes in the different facies belt,appearing intermittent water absorption,even no water.Numerical simulation study shows that the remaining oil mainly concentrates in the reservoirs of oilfield edge and the cross-well channel sand,and the space of remaining oil increases.This study fully taps the potential of seismic data and reunderstands the structure and reservoir of developed oilfields.The reservoir distribution characteristics and the remaining oil potential are further defined.
This paper reconstructs the pseudo-acoustic curve by fusing the low-requency component of wave impedance curves and the high frequency components of spontaneous potential and taking the reconstruction inversion of P reservoir in G Area of Daqing Placanticline as an example.The constrained sparse spike inversion,the characteristic parameter reconstruction inversion and the processing after inversion are carried out.By broadening the reconstruction of seismic frequency band inversion method,the resolution of the seismic inversion can be improved,the docking relationship of sand body and its distributing feature of the reservoir space are better defined.Study results show that the sandstone more than 5 m and the thin sandstone about 2 m can be cognized longitudinally.Sand body is in narrow banded and distributes discretely,so the heterogeneity becomes more prominent in the plane and interlayer.Water absorption greatly changes in the different facies belt,appearing intermittent water absorption,even no water.Numerical simulation study shows that the remaining oil mainly concentrates in the reservoirs of oilfield edge and the cross-well channel sand,and the space of remaining oil increases.This study fully taps the potential of seismic data and reunderstands the structure and reservoir of developed oilfields.The reservoir distribution characteristics and the remaining oil potential are further defined.
引文
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[14]邓吉锋,张平平,周东红,等.正演模拟技术在渤中21-2构造碳酸盐岩地层岩性尖灭线刻画中的应用研究[J].石油地质与工程,2012,26(5):42-44.
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[17]姚军,张娜,黄朝琴,等.非均质油藏多尺度混合有限元数值模拟方法[J].石油学报,2012,33(3):442-447.
[18]叶银珠,王正波.聚驱后油藏剩余油分布数值模拟[J].吉林大学学报:地球科学版,2012,42(增刊1):119-126.
[19]胡慧芳.油藏数值模拟历史拟合质量评价方法[J].断块油气田,2012,19(3):354-358.
[20]张广明,熊春明,刘合,等.复杂断块地应力场数值模拟方法研究[J].断块油气田,2011,18(6):710-713.
[21]陈元千,邹存友,张枫.水驱曲线法在油田开发评价中的应用[J].断块油气田,2011,18(6):769-771,779.
[22]曲良超,卞昌蓉.井震结合断层建模技术在复杂断块中的应用[J].断块油气田,2012,19(4):426-429.
[2]黄伏生,李占东,卢双舫,等.宽频带重构反演在喇嘛甸油田北东一区萨尔图油层的应用[J].科学技术与工程,2010,10(35):8682-8686,8691.
[3]刘文岭,韩大匡,胡水清,等.高含水油田发展油藏地球物理技术的思考与实践[J].石油学报,2009,30(4):550-554,559.
[4]刘文岭.高含水油田油藏地球物理技术:中国石油物探的新领域[J].石油学报,2010,31(6):959-965.
[5]韩大匡.准确预测剩余油相对富集区提高油田注水采收率研究[J].石油学报,2007,28(2):73-78.
[6]刘文岭,牛彦良,李刚,等.多信息储层预测地震属性提取与有效性分析方法[J].石油物探,2002,41(1):100-106.
[7]刘文岭,韩大匡,程蒲,等.高含水油田井震联合重构地下认识体系[J].石油地球物理勘探,2011,46(6):930-937,1012.
[8]金利.灰色关联技术在老油田储层预测解释中的应用[J].断块油气田,2012,19(5):600-603.
[9]舒克栋,张才智,程超,等.约束稀疏脉冲反演在泌阳凹陷南部陡坡带中的应用[J].新疆石油天然气,2011,7(1):16-20.
[10]李庆忠.走向精细勘探的道路[M].北京:石油工业出版社,1993:20-30.
[11]单敬福,王峰,孙海雷,等.基于地震波阻抗反演的小层砂体预测技术:在大庆油田州57水平井区块的应用[J].石油与天然气地质,2010,31(2):212-218.
[12]尹艳树,冯舒,尹太举.曲流河储层建模方法的比较研究[J].断块油气田,2012,19(1):44-46,64.
[13]刘卫,林承焰,杨永智,等.窄薄砂岩油藏储层非均质性综合评价[J].油气地质与采收率,2010,17(1):37-40.
[14]邓吉锋,张平平,周东红,等.正演模拟技术在渤中21-2构造碳酸盐岩地层岩性尖灭线刻画中的应用研究[J].石油地质与工程,2012,26(5):42-44.
[15]周贤文,汤达帧,张春书.精细油藏数值模拟研究现状及发展趋势[J].特种油气藏,2008,15(4):1-6,12.
[16]李淑霞,盖英杰,张俨彬.油藏数值模拟效果的定量评价方法[J].石油大学学报:自然科学版,2001,25(6):58-60.
[17]姚军,张娜,黄朝琴,等.非均质油藏多尺度混合有限元数值模拟方法[J].石油学报,2012,33(3):442-447.
[18]叶银珠,王正波.聚驱后油藏剩余油分布数值模拟[J].吉林大学学报:地球科学版,2012,42(增刊1):119-126.
[19]胡慧芳.油藏数值模拟历史拟合质量评价方法[J].断块油气田,2012,19(3):354-358.
[20]张广明,熊春明,刘合,等.复杂断块地应力场数值模拟方法研究[J].断块油气田,2011,18(6):710-713.
[21]陈元千,邹存友,张枫.水驱曲线法在油田开发评价中的应用[J].断块油气田,2011,18(6):769-771,779.
[22]曲良超,卞昌蓉.井震结合断层建模技术在复杂断块中的应用[J].断块油气田,2012,19(4):426-429.
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