复杂岩性有效储层地震预测技术——以B气田大安寨段一亚段气藏为例
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摘要
根据B气田取心资料、野外露头、钻录井资料以及前人研究成果发现,B气田大安寨段一亚段发育滨湖、浅湖沉积亚相,储层主要为浅湖亚相介壳滩微相,储层岩性复杂,为特低孔、低渗的孔隙型储层。如何从致密复杂的岩性中识别出有效储层是研究的重点。文中运用以沉积相为指导,测井分析为基础,"相控"+"储控"为核心,地震多参数反演为主要手段的储层综合预测技术,预测了B气田大安寨段一亚段储层的展布特征、有效储层厚度及孔隙度。由此形成了一套致密复杂岩性有效储层地震预测技术序列。该技术经钻井证实,应用效果良好,为勘探部署提供了技术支撑。
For the dense and complex lithology reservoir with very low porosity, very low permeability and strong heterogeneities, this paper, taking the 1stinterval of Da′anzhai Section in B Gas field as example, presents a seismic prediction technology for dense and complex lithology reservoir. The analysis on the coring data, outcrop, drilling & logging data and the results of previous studies confirms that the lake-shore and shallow lake subfacies deposition developed in the 1stinterval of Da′anzhai Section in B Gas field, the complex lithology reservoir, which is of extra low porosity and low infiltration, is mainly distributed in shelly beach microfacies of the shallow lake subfacies. The key of this research is how to tell the effective reservoir from dense complex lithology. The comprehensive technique which adopts the sedimentary facies as a guide, logging analysis as the foundation, "phased" + "storage control" as the core,multi-parameter inversion of seismic as the main means, is used to predict the reservoir plane distribution features, thickness and porosity of the effective reservoir of the 1stinterval of Da′ anzhai Section. Meanwhile, a seismic prediction technology of effective reservoir in dense and complex lithology is formed. Drilling data confirm that the technology has played a good role in reservoir prediction of the 1stinterval of Da′anzhai Section, and which provides the technical support for the exploration and deployment.
For the dense and complex lithology reservoir with very low porosity, very low permeability and strong heterogeneities, this paper, taking the 1stinterval of Da′anzhai Section in B Gas field as example, presents a seismic prediction technology for dense and complex lithology reservoir. The analysis on the coring data, outcrop, drilling & logging data and the results of previous studies confirms that the lake-shore and shallow lake subfacies deposition developed in the 1stinterval of Da′anzhai Section in B Gas field, the complex lithology reservoir, which is of extra low porosity and low infiltration, is mainly distributed in shelly beach microfacies of the shallow lake subfacies. The key of this research is how to tell the effective reservoir from dense complex lithology. The comprehensive technique which adopts the sedimentary facies as a guide, logging analysis as the foundation, "phased" + "storage control" as the core,multi-parameter inversion of seismic as the main means, is used to predict the reservoir plane distribution features, thickness and porosity of the effective reservoir of the 1stinterval of Da′ anzhai Section. Meanwhile, a seismic prediction technology of effective reservoir in dense and complex lithology is formed. Drilling data confirm that the technology has played a good role in reservoir prediction of the 1stinterval of Da′anzhai Section, and which provides the technical support for the exploration and deployment.
引文
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[2]丁一,李智武,冯逢,等.川中龙岗地区下侏罗统自流井组大安寨段湖相混合沉积及其致密油勘探意义[J].地质论评,2013,59(2):389-399.
[3]汪少勇,李建忠,李登华,等.川中地区公山庙油田侏罗系大安寨段致密油资源潜力分析[J].中国地质,2013,40(2):477-486.
[4]王世谦,胡素云,董大忠,等.四川盆地亟待重视的一个致密油气新领域[J].天然气工业,2012,32(12):22-29.
[5]蒋裕强,漆麟,邓海波,等.四川盆地侏罗系油气成藏条件及勘探潜力[J].天然气工业,2010,90(3):22-26.
[6]宋玲.多源多相复杂储集层预测[J].断块油气田,2014,21(5):597-600.
[7]姚健,杜晓峰,郑敬贵,等.辽东湾地区浊积扇体识别及储层地震描述方法研究[J].断块油气田,2012,19(6):718-721.
[8]郑荣才.四川盆地下侏罗统大安寨段高分辨率层序地层学[J].沉积学报,1998,16(2):42-49.
[9]徐双辉,陈洪德,林良彪,等.川东北渠县地区大安寨段储层特征[J].成都理工大学学报:自然科学版,2013,40(2):200-207.
[10]谢林,王兴志,张帆,等.四川盆地文井—明月地区大安寨段储层研究[J].中国地质,2010,37(5):1393-1398.
[11]宋子齐,景成,孙宝佃,等.自然电位、自然伽马测井曲线在文15块的应用[J].断块油气田,2011,18(1):130-133.
[12]何羽飞,刘淼,赵建斌,等.致密油储层复杂岩性测井综合识别[J].油气藏评价与开发,2014,4(4):7-10.
[13]王有涛,陈学国,郝志伟,等.高分辨率反演在春风油田储层预测中的应用[J].断块油气田,2013,20(3):293-295.
[14]佘晓宇,董政,龚晓星,等.塔中卡塔克隆起南北坡上奥陶统礁滩地震识别与储层预测[J].石油实验地质,2014,36(1):16-24.
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