盐系地层岩性油藏预测方法研究
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摘要
针对潜江凹陷岩性油藏储层与非储层之间波阻抗差异小,储层薄,波阻抗反演存在多解性且不能定量预测等问题,探讨了盐系地层岩性油藏预测的研究思路和配套技术。对潜江组盐系地层的岩石物理特征进行了分析,在此基础上提出了针对性的储层预测方法:①应用高分辨率层序地层学方法确定潜江凹陷岩性油藏的有利分布区;②通过基于模型的井约束稀疏脉冲反演获得的波阻抗数据体进行砂体描述;③利用地震约束测井反演方法,对自然伽马和密度等岩性敏感测井参数进行反演,得到拟测井参数反演数据体,在此基础上对砂体厚度进行预测,对储层进行定量评价;④利用多信息含油性预测方法对储层的含油性进行评价。在潜江凹陷广北油田,应用上述岩性油藏预测方法预测了储层发育区域,部署的广43-1井钻遇的某砂组与预测的厚度吻合,试获38．0 t／d的高产工业油流。
There exist some problems between reservoir and non-reservoir in Qianjiang depression, which are small difference in acoustic impedance, thin thickness of reservoir, existence of multi-solutions for acoustic impedance inversion and not able to predict quantitatively. Aiming at these problems, the study thoughts and supporting techniques for lithologic deposit prediction in saliferous strata are discussed. Rock property of the reservoir is analyzed. On the basis of this, the reservoir prediction methods are proposed;①high-resolution sequence stratigraphy method, which can be used to ascertain the favorable zone of lithologic deposit in Qianjiang depression;②well-restrained rarefaction impulse inversion, which can be used to obtain the acoustic impendence data for describing sand bodies;③seismic-restrained log inversion method, which can be used for the inversion of the lithologic-sensitive log parameters to obtain the pseudolog inversion data, predict the thickness of sand body, and quantitatively evaluate the reservoir;④multi-information oiliness prediction method, which can be used to evaluate oiliness of reservoir. The above mentioned methods have been used to predict the reservoir-developed region of Guangbei oilfield in Qianjiang depression, the thickness of one sand set of the deployed Guang 43-1 well coincides with the predicted value, obtaining an output as high as 38 t/d of oil flow in testing.
There exist some problems between reservoir and non-reservoir in Qianjiang depression, which are small difference in acoustic impedance, thin thickness of reservoir, existence of multi-solutions for acoustic impedance inversion and not able to predict quantitatively. Aiming at these problems, the study thoughts and supporting techniques for lithologic deposit prediction in saliferous strata are discussed. Rock property of the reservoir is analyzed. On the basis of this, the reservoir prediction methods are proposed;①high-resolution sequence stratigraphy method, which can be used to ascertain the favorable zone of lithologic deposit in Qianjiang depression;②well-restrained rarefaction impulse inversion, which can be used to obtain the acoustic impendence data for describing sand bodies;③seismic-restrained log inversion method, which can be used for the inversion of the lithologic-sensitive log parameters to obtain the pseudolog inversion data, predict the thickness of sand body, and quantitatively evaluate the reservoir;④multi-information oiliness prediction method, which can be used to evaluate oiliness of reservoir. The above mentioned methods have been used to predict the reservoir-developed region of Guangbei oilfield in Qianjiang depression, the thickness of one sand set of the deployed Guang 43-1 well coincides with the predicted value, obtaining an output as high as 38 t/d of oil flow in testing.
引文
1王典敷,汪仕忠．盐湖油田地质[M]．北京:石油工业出版社,2001．14-18
2胡辉,向树安．潜江凹陷岩性油藏形成条件及分布规律研究[J]．地质力学学报,2005,14(1):37-38
3李兴权,崔丽静,陈少平．隐蔽油气藏勘探回顾与展望[J]．油气地质与采收率,2005,12(1):30-32
4黄捍东,贺振华,刘洪昌．测井-构造约束地震资料目标反演[J]．石油地球物理勘探,1999,34(5):595-600
5王玉学,侯伯刚,牛滨华等．地震储层反演技术在冀中南马庄地区的应用[J]．现代地质,2003,17:219-222
6李军,张超谟．应用测井、地震资料进行底砂体储层横向预测实例[J]．石油地球物理勘探,1997,32(2):23- 27
7刘春成,王玉鹃,兰立新．Jason软件在滚动勘探中的应用[J]．石油知识,1999,12(5):27
8安鸿伟,李正文,李仁甫等．稀疏脉冲波阻抗反演在XY油田开发中的应用[J]．石油物探,2002,41(1): 56-60
9王西文．相对波阻抗约束下的测井参数反演方法和应用[J]．石油地球物理勘探,2004,39(3):291-299
10王西文．岩性油气藏的预测及评价技术研究[J]．石油物探,2004,43(6):511-519
11王西文,刘全新,周嘉玺等．精细储层预测技术在板南5-3井区的应用[J]．石油物探,2003,42(3);390-394
12王西文,苏明军．相控-等时小层对比方法及应用[J]．石油勘探与开发,2003,30(6):78-80
13李思田,潘元林,陆永潮等．断陷盆地隐蔽油藏预测及勘探的关键技术——高精度地震探测基础上的层序地层学研究[J]．地球科学,2002,27(5):592-597
14彭路平,李在光,曹正林．应用地球物理综合技术预测盐湖沉积的含油性[J]．石油勘探与开发,2001,28(3): 5-7
2胡辉,向树安．潜江凹陷岩性油藏形成条件及分布规律研究[J]．地质力学学报,2005,14(1):37-38
3李兴权,崔丽静,陈少平．隐蔽油气藏勘探回顾与展望[J]．油气地质与采收率,2005,12(1):30-32
4黄捍东,贺振华,刘洪昌．测井-构造约束地震资料目标反演[J]．石油地球物理勘探,1999,34(5):595-600
5王玉学,侯伯刚,牛滨华等．地震储层反演技术在冀中南马庄地区的应用[J]．现代地质,2003,17:219-222
6李军,张超谟．应用测井、地震资料进行底砂体储层横向预测实例[J]．石油地球物理勘探,1997,32(2):23- 27
7刘春成,王玉鹃,兰立新．Jason软件在滚动勘探中的应用[J]．石油知识,1999,12(5):27
8安鸿伟,李正文,李仁甫等．稀疏脉冲波阻抗反演在XY油田开发中的应用[J]．石油物探,2002,41(1): 56-60
9王西文．相对波阻抗约束下的测井参数反演方法和应用[J]．石油地球物理勘探,2004,39(3):291-299
10王西文．岩性油气藏的预测及评价技术研究[J]．石油物探,2004,43(6):511-519
11王西文,刘全新,周嘉玺等．精细储层预测技术在板南5-3井区的应用[J]．石油物探,2003,42(3);390-394
12王西文,苏明军．相控-等时小层对比方法及应用[J]．石油勘探与开发,2003,30(6):78-80
13李思田,潘元林,陆永潮等．断陷盆地隐蔽油藏预测及勘探的关键技术——高精度地震探测基础上的层序地层学研究[J]．地球科学,2002,27(5):592-597
14彭路平,李在光,曹正林．应用地球物理综合技术预测盐湖沉积的含油性[J]．石油勘探与开发,2001,28(3): 5-7
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