中国石油勘探
中國石油勘探
중국석유감탐
CHINA PETROLEUM EXPLORATION
2013年
5期
15-23
,共9页
四川盆地%下古生界%桐湾运动%加里东运动%油气勘探
四川盆地%下古生界%桐灣運動%加裏東運動%油氣勘探
사천분지%하고생계%동만운동%가리동운동%유기감탐
Sichuan Basin%Lower Paleozoic%Tongwan movement%Caledonian movement%petroleum exploration
四川盆地早古生代曾发生澄江、桐湾、云贵、冶里及加里东等5次地壳运动，其动力主要来自印度板块的向北俯冲和欧亚板块的向东漂移，并与青藏板块相碰撞，使青藏板块迅急向东，在盆地西部龙门山一带的薄弱地带发生断裂，致使青藏板块向东逆覆于扬子地台板块之上，相继四川盆地形成。5次地壳运动使龙门山大断裂带规模一次比一次大，使下古生界油气勘探储层也逐渐东移，勘探范围也逐渐变小。经勘探证实，共形成了雅安-龙女寺、泸州和天井山3个古隆起，是油气勘探的有利地区，特别是雅安-龙女寺古隆起区，不但规模大，各时期碳酸盐岩储层发育，局部构造多，且其西北翼遭受剥蚀的程度较深，经大气淡水长期淋溶，各储层必然会产生大量的古岩溶缝、洞，当其彼此纵横向相互交切后便可形成一个庞大的缝、洞网络空间，对油气聚集成藏十分有利。泸州古隆起和天井山古隆起上，也有较多局部构造可供钻探下古生界碳酸盐岩储层。
四川盆地早古生代曾髮生澄江、桐灣、雲貴、冶裏及加裏東等5次地殼運動，其動力主要來自印度闆塊的嚮北俯遲和歐亞闆塊的嚮東漂移，併與青藏闆塊相踫撞，使青藏闆塊迅急嚮東，在盆地西部龍門山一帶的薄弱地帶髮生斷裂，緻使青藏闆塊嚮東逆覆于颺子地檯闆塊之上，相繼四川盆地形成。5次地殼運動使龍門山大斷裂帶規模一次比一次大，使下古生界油氣勘探儲層也逐漸東移，勘探範圍也逐漸變小。經勘探證實，共形成瞭雅安-龍女寺、瀘州和天井山3箇古隆起，是油氣勘探的有利地區，特彆是雅安-龍女寺古隆起區，不但規模大，各時期碳痠鹽巖儲層髮育，跼部構造多，且其西北翼遭受剝蝕的程度較深，經大氣淡水長期淋溶，各儲層必然會產生大量的古巖溶縫、洞，噹其彼此縱橫嚮相互交切後便可形成一箇龐大的縫、洞網絡空間，對油氣聚集成藏十分有利。瀘州古隆起和天井山古隆起上，也有較多跼部構造可供鑽探下古生界碳痠鹽巖儲層。
사천분지조고생대증발생징강、동만、운귀、야리급가리동등5차지각운동，기동력주요래자인도판괴적향북부충화구아판괴적향동표이，병여청장판괴상팽당，사청장판괴신급향동，재분지서부룡문산일대적박약지대발생단렬，치사청장판괴향동역복우양자지태판괴지상，상계사천분지형성。5차지각운동사룡문산대단렬대규모일차비일차대，사하고생계유기감탐저층야축점동이，감탐범위야축점변소。경감탐증실，공형성료아안-룡녀사、로주화천정산3개고륭기，시유기감탐적유리지구，특별시아안-룡녀사고륭기구，불단규모대，각시기탄산염암저층발육，국부구조다，차기서북익조수박식적정도교심，경대기담수장기림용，각저층필연회산생대량적고암용봉、동，당기피차종횡향상호교절후편가형성일개방대적봉、동망락공간，대유기취집성장십분유리。로주고륭기화천정산고륭기상，야유교다국부구조가공찬탐하고생계탄산염암저층。
Early Paleozoic of Sichuan Basin underwent ifve crustal movements, that is, Chengjiang movement, Tongwan movement, Yungui movement, Yeli movement, and Caledonian movement, caused by the northward subduction of Indian Plate and the eastward drift of Eurasian Plate. The two Plates collided with Qinghai-Tibet Plate, causing the latter to swift to the east and collapse in weak zone of Longmen mountain area of western Sichuan Basin. As a result, Qinghai-Tibet Plate reversed eastward and covered Yangtze platform plate, and Sichuan Basin was formed in succession. Because of the ifve crustal movements, the big fault zones in Longmen Mountain got larger and larger in scale, as a result petroleum exploration reservoirs of Lower Paleozoic moved towards the east gradually and the exploration range got smaller. Exploration here proved that the Yaan-Longnvsi palaeohigh, the Luzhou palaeohigh, and the Tianjingshan palaeohigh were formed, which are favorable for petroleum exploration. In particular, the Yaan-Longnvsi palaeohigh is large, carbonate reservoirs here developed in each period, and there are also many local structures. Moreover, the northwest wing was eroded heavily and was leached by meteoric water for a long time. A great number of ancient karst ifssures and caves emerged in all reservoirs. When they crossed each other vertically and horizontally, a giant ifssure and cave system would be formed, which is very good for hydrocarbon accumulation and reservoir formation. There are also many local structures in Luzhou palaeohigh and Tianjingshan palaeohigh, and they could be used for Lower Paleozoic carbonate reservoir drilling and exploration.
