川东北宣汉—达县地区构造演化及其对油气藏的改造作用
摘要
川东北宣汉—达县地区是当前我国南方海相油气勘探的重要探区和突破区,在对该区约500 km2三维地震精细解释结果和区域构造背景综合分析的基础上,结合构造演化剖面和普光、毛坝场两个典型油气藏的综合特征,分析了不同时期、不同应力场下宣汉—达县地区构造样式及构造圈闭的形成与后期叠加改造。研究结果显示晚印支期普光、毛坝场等构造已具雏形,燕山晚期构造定型,在中构造层形成大量的北东向构造,喜山期被北西向构造叠加改造。进而从构造角度剖析了喜山运动特别是断裂、褶皱及局部构造的演化对早期油气藏的调整改造作用,研究表明喜山运动对宣汉—达县地区普光、毛坝场等构造圈闭油气藏的空间几何形态、构造演化特征、断裂疏导体系及储盖条件等均具有重要影响作用。
Xuanhan-Daxian area in northeastern Sichuan basin is one of the most important areas for the petroleum exploration in south China,it has been investigated for many years,and in 2003 it has been proved to be a new area which has plentiful petroleum resource by the well Puguang 1.Based on detailed interpretation of about 500 km2 of three-demension seismic data and tectonic characteristics in northeastern Sichuan basin,according to the structure evolution profile and the similar features of two typical reservoirs of Puguang and Maobachang,the formation and stack of the structure styles in different stages and different stress fields have been studied, Puguang and Maobachang structural traps have their early prototype in later Indosinian Movement epoch,forming in later Yanshanian Movement epoch,being reconstructed in Himalayan Movement epoch.The reconstruction of Himalayan Movement to early carbonate rock reservoirs has been analyzed,especially the reforming function of the evolution of fault and fold system.The research shows that the Himalayan Movement has played a great important role in the structural geometry,tectonic evolution characteristics,fault system and reservoir-cap rock conditions of the carbonate rock reservoirs such as Puguang and Maobachang in Xuanhan-Daxian area.
Xuanhan-Daxian area in northeastern Sichuan basin is one of the most important areas for the petroleum exploration in south China,it has been investigated for many years,and in 2003 it has been proved to be a new area which has plentiful petroleum resource by the well Puguang 1.Based on detailed interpretation of about 500 km2 of three-demension seismic data and tectonic characteristics in northeastern Sichuan basin,according to the structure evolution profile and the similar features of two typical reservoirs of Puguang and Maobachang,the formation and stack of the structure styles in different stages and different stress fields have been studied, Puguang and Maobachang structural traps have their early prototype in later Indosinian Movement epoch,forming in later Yanshanian Movement epoch,being reconstructed in Himalayan Movement epoch.The reconstruction of Himalayan Movement to early carbonate rock reservoirs has been analyzed,especially the reforming function of the evolution of fault and fold system.The research shows that the Himalayan Movement has played a great important role in the structural geometry,tectonic evolution characteristics,fault system and reservoir-cap rock conditions of the carbonate rock reservoirs such as Puguang and Maobachang in Xuanhan-Daxian area.
引文
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[2]宋岩,王喜双.新构造运动对天然气晚期成藏的控制作用[J].天然气地球科学,2003,14(2):103-106.
[3]戴少武.中国南方油气晚期成藏勘探实践及讨论[J].天然气工业,2004,24(1):7-9.
[4]刘池洋.后期改造强烈——中国沉积型盆地的重要特点之一[J].石油与天然气地质,1996,17(4):255-261.
[5]王庭斌.新近纪以来中国构造演化特征与天然气田的分布格局[J].地学前缘,2004,11(4):403-416.
[6]Gianluca Grando,McClay KR.Structural evolution of the Bramptongrowth fold system,Atwater Valley-Southern Green Canyon area,deep water Gulf of Mexico[J].Marine and Petroleum Geology,2004,21:889-910.
[7]McClay K R,Whitehouse P S,Dooley T,et al.3D evolution offold and thrust belts formed by oblique convergence[J].Marineand Petroleum Geology,2004,21:857-877.
[8]Kleckera R,Benthama P,Palmer-Kolemanb S,et al.A recentpetroleum-geologic evaluation of the Central Carpathian Depres-sion,Southeastern Poland[J].Marine and Petroleum Geology,2001,18:65-85.
[9]Baud Jaime,Moore Aidan,Lee Chao-Slning.Tectonic struc-ture and petroleum potential of Tayabas Bay,southeast Luzon,Philippines[J].Journal of Asian Earth Sciences,1997,15:193-215.
[10]张抗.改造型盆地研究中的创新思维[J].石油科技论坛,2004,12(6):27-30.
[11]刘和甫,李景明,李晓清,等.中国克拉通盆地演化与碳酸盐岩—蒸发岩层序油气形态[J].现代地质,2006,20(1):1-18.
[12]吴世祥,马永生,金之钧,等.米仓山前陆盆地东段构造演化模式与油气聚集[J].石油勘探与开发,2006,33(1):14-16.
[13]汪泽成,赵文智,徐安娜,等.四川盆地北部大巴山山前带构造样式与变形机制[J].现代地质,2006,20(3):429-435.
[14]高长林,刘光祥,张玉箴,等.东秦岭—大巴山逆冲推覆构造与油气远景[J].石油实验地质,2003,25(增刊):523-531.
[15]翟光明,何文渊.中国前陆盆地特点及未来油气勘探策略[M]//中国石油勘探与生产分公司.中国中西部前陆盆地冲断带油气勘探文集.北京:石油工业出版社,2002:15-22.
[16]汪新伟,汪新文,马永生.新疆博格达山的构造演化及其与油气的关系[J].现代地质,2007,21(1):116-124.
[17]Barclay J E,David G Smith.Western Canada foreland basin oiland gas plays[M]//Leckie D A,Macqueen R W.ForelandBasins and Fold Belts.Tulsa:AAPG,1992:191-228.
[18]刘光祥,陶静源,潘文蕾,等.川东北及川东地区天然气成因类型探讨[J].石油实验地质,2002,24(6):512-516.
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