四川盆地震旦系-下古生界古油藏特征
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摘要
四川盆地震旦系-下古生界(简称下组合)古油藏发育,储层沥青丰富,在不同层系均可见及。乐山-龙女寺加里东期沉积-剥蚀型古隆起是古油藏石油运移、充注的指向区,总体上控制了下组合储层沥青的分布。盆地及周缘震旦系曾超大规模成藏,普遍有石油聚集过程,但局部富集;下古生界古油藏则由众多分散的、小型的岩性-构造古油藏构成。古油藏原油是优质气源,而且是天然气藏的良好封堵层。油藏裂解时圈闭开放度与现今气藏成藏率成正比,同时,古油藏与现今气藏位置上的继承性更加有利于裂解气藏的保存。
The paleo-oil reservoirs showing in Sinian System-Lower Paleozoic are very normal and bitumen in the paleo-oil reservoirs is very abundant.The Leshan-Longnshi paleouplift in Sichuan Basin is a favorable area where oil migrates or fills.The paleouplift mainly controls the distribution of the content and abundance of bitumen in reservoirs.In Sinian System,there is a wide range of oil accumulation,and ultra-large litho-tectonic paleo-oil reservoir formed,but enriched locally.The paleo-oil reservoir of Lower Paleozoic is composed of dispersion-like and small scale litho-tectonic paleo-oil reservoirs.The oil in the paleo-oil reservoir is the quality gas source,and bitumen belt is a good natural gas sealing layer.The trap opening degree of the gas reservoir is proportional to the rate of accumulation when the oil is cracking.And the position between the paleo-oil reservoir and present-day gas reservoir is favorable for the conservation of the oil-cracking gas reservoir.
The paleo-oil reservoirs showing in Sinian System-Lower Paleozoic are very normal and bitumen in the paleo-oil reservoirs is very abundant.The Leshan-Longnshi paleouplift in Sichuan Basin is a favorable area where oil migrates or fills.The paleouplift mainly controls the distribution of the content and abundance of bitumen in reservoirs.In Sinian System,there is a wide range of oil accumulation,and ultra-large litho-tectonic paleo-oil reservoir formed,but enriched locally.The paleo-oil reservoir of Lower Paleozoic is composed of dispersion-like and small scale litho-tectonic paleo-oil reservoirs.The oil in the paleo-oil reservoir is the quality gas source,and bitumen belt is a good natural gas sealing layer.The trap opening degree of the gas reservoir is proportional to the rate of accumulation when the oil is cracking.And the position between the paleo-oil reservoir and present-day gas reservoir is favorable for the conservation of the oil-cracking gas reservoir.
引文
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[23]Hill C A.H2S-related porosity and sulfuric acid oil-field karst[J].AAPG Memoir,1995,63:301-306.
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[25]朱光有,张水昌,梁英波,等.四川盆地威远大气田硫化氢的成因及其证据[J].科学通报,2006,51(23):2780-2788.
[26]马永生,蔡勋育.四川盆地川东北区二叠系-三叠系天然气勘探成果与前景展望[J].石油与天然气地质,2006,27(6):741-750.
[2]Liu S G,Wang H,Sun W,et al.Energy field adjust-ment and hydrocarbon phase evolution in Sinian-Lower Paleozoic Sichuan Basin[J].Journal of China Universi-ty of Geosciences,2008,19(6):700-706.
[3]汪泽成,赵文智,张林,等.四川盆地构造层序与天然气勘探[M].北京:地质出版社,2002.
[4]徐国盛,袁海峰,马永生,等.川中-川东南地区震旦系-下古生界沥青来源及成烃演化[J].地质学报,2007,81(8):1143-1152.
[5]徐世琦,张光荣,李国辉,等.加里东古隆起震旦系的烃源条件[J].成都理工学院学报,2000,27(增刊):131-137.
[6]徐世琦,代宗仰,蒋小光,等.古隆起区带寒武系洗象池群成藏条件与勘探前景分析[J].天然气勘探与开发,2006,29(4):4-8.
[7]胡守志,王廷栋,付晓文,等.四川盆地中部震旦系天然气勘探前景研究[J].石油实验地质,2005,3(27):224-226.
[8]张林,魏国齐,韩龙,等.四川盆地震旦系-下古生界高成熟度烃源岩评价[J].石油实验地质,2008,30(3):286-291.
[9]刘树根,马永生,王国芝,等.四川盆地震旦系-下古生界优质储层形成与保存机制[J].油气地质与采收率,2008,15(1):1-5.
[10]Tian H,Xiao X M,Wilkins Ronald W T,et al.New insights to the volume and pressure changes during the thermal cracking of oil to gas in reservoirs:implications for the in-situ accumulation of gas cracked from oils[J].AAPG Bulletin,2008,92(2):181-200.
[11]胡守志,付晓文,王庭栋,等.储层中的沥青沉淀带及其对油气勘探的意义[J].天然气地球科学,2007,18(1):99-103.
[12]胡东风,戴鸿鸣.四川盆地川东南地区下组合油气地质评价[R].成都:中石化南方勘探开发研究院,2005.
[13]赵泽恒,张桂权,薛秀丽.黔中古隆起下组合古油藏和残余油气藏[J].天然气工业,2008,28(8):39-42.
[14]赵孟军,卢双舫.原油二次裂解气———天然气重要的生成途径[J].地质论评,2000,46(6):645-650.
[15]Barker C.Calculated volume and pressure changes dur-ing the thermal cracking of oil to gas in reservoirs[J].AAPG Bulletin,1990,74(8):1254-1261.
[16]秦建中,刘宝泉.海相不同类型烃源岩生烃排烃模式研究[J].石油实验地质,2005,27(1):74-80.
[17]刘光祥.塔里木盆地S74井稠油热模拟实验研究(二)———沥青生烃潜力探讨[J].石油实验地质,2008,30(4):382-385.
[18]宫色,彭平安,卢玉红,等.生物降解沥青砂再次热作用的实验模拟[J].科学通报,2004,49(增刊I):39-47.
[19]谢增业,田世澄,魏国齐,等.川东北飞仙关组储层沥青与古油藏研究[J].天然气地球科学,2005,16(3):283-288.
[20]田辉,肖贤明,杨立国,等.原油高温裂解生气潜力与气体特征[J].科学通报,2009,54(6):781-786.
[21]马永生.四川盆地普光超大型气田的形成机制[J].石油学报,2007,28(2):9-14.
[22]马永生,蔡勋育,郭彤楼.四川盆地普光大型气田油气充注与富集成藏的主控因素[J].科学通报,2007,52(增刊I):149-155.
[23]Hill C A.H2S-related porosity and sulfuric acid oil-field karst[J].AAPG Memoir,1995,63:301-306.
[24]朱光有,张水昌,梁英波,等.硫酸盐热化学还原反应对烃类的蚀变作用[J].石油学报,2005,26(5):48-52.
[25]朱光有,张水昌,梁英波,等.四川盆地威远大气田硫化氢的成因及其证据[J].科学通报,2006,51(23):2780-2788.
[26]马永生,蔡勋育.四川盆地川东北区二叠系-三叠系天然气勘探成果与前景展望[J].石油与天然气地质,2006,27(6):741-750.
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