古龙凹陷葡萄花油层低饱和度油藏成因
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摘要
在对古龙凹陷葡萄花油层油气成藏要素分析的基础上,综合利用岩石物性测试、压汞、恒速压汞、密闭取心分析等多种技术方法,定量、半定量地研究了葡萄花油层低饱和度油藏的成因。研究表明:葡萄花油层孔隙结构差,油气运移毛细管阻力较大,原油驱替水不充分,是低饱和度油藏的主要内因;地层较平缓,构造幅度低,小于油水过渡带的高度,是形成低饱和度油藏的强化因素;油藏构造调整导致早期油藏遭到破坏、晚期油藏分异不充分是低饱和度油藏的一个重要原因。
On the basis of reservoir formation of Putaohua layer in Gulong Sag, various methods including rock physical properties test, mercury intrusion, constant-rate mercury injection and confined core have been comprehensively applied to quantitatively and semi-quantitatively determine the low oil saturation genesis. The result shows that the main reasons of low saturation are the inferior pore structure of layers, relative great capillary resistance of hydrocarbon migration and insufficient crude oil flooding water;relatively flat strata and low amplitude structure which is lower than the height of oil-water transition zone are the reinforcing factors;the early stage reservoir damage and late stage insufficient reservoir differentiation resulted from reservoir structure adjustment mainly lead to the formation of low saturation reservoir.
On the basis of reservoir formation of Putaohua layer in Gulong Sag, various methods including rock physical properties test, mercury intrusion, constant-rate mercury injection and confined core have been comprehensively applied to quantitatively and semi-quantitatively determine the low oil saturation genesis. The result shows that the main reasons of low saturation are the inferior pore structure of layers, relative great capillary resistance of hydrocarbon migration and insufficient crude oil flooding water;relatively flat strata and low amplitude structure which is lower than the height of oil-water transition zone are the reinforcing factors;the early stage reservoir damage and late stage insufficient reservoir differentiation resulted from reservoir structure adjustment mainly lead to the formation of low saturation reservoir.
引文
[1]刘柏林,李治平,匡松远,等.低含油饱和度油藏油水渗流特征:以准噶尔盆地中部1区块为例[J].油气地质与采收率,2007,14(1):69-72.
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[11]刘超威,陈世加,姚宜同,等.鄂尔多斯盆地姬塬地区长2油藏低含油饱和度成因[J].断块油气田,2015,22(3):305-308.
[12]邸世祥.中国碎屑岩储集层的孔隙结构[M].西安:西北大学出版社,1991:78.
[13]罗蛰潭,王允诚.油气储集层的孔隙结构[M].北京:科学出版社,1986:83.
[14]郑雷清.综合识别方法在低阻油气层勘探中的应用[J].岩性油气藏,2007,19(2):71-75.
[15]邹志文,斯春松,杨梦云.隔夹层成因、分布及其对油水分布的影响:以准噶尔盆地腹部莫索湾莫北地区为例[J].岩性油气藏,2010,22(3):66-99.
[16]许艳争,杜箫笙,毕明柱,等.低幅度构造油藏富集主控因素及成藏模式:以红河油田延安组油藏为例[J].断块油气田,2015,22(5):556-560.
[17]李明诚.石油与天然气运移[M].北京:石油工业出版社,1994:14.
[2]刘柏林.低含油饱和度油藏成因及渗流特征研究:以新疆准噶尔中部1区块为例[D].北京:中国地质大学(北京),2008.
[3]蒙启安,黄薇,林铁峰,等.松辽盆地北部岩性油藏形成条件与分布规律[J].中国石油勘探,2004,9(4):6-11.
[4]萧德铭,迟元林,蒙启安,等.松辽盆地北部向斜区岩性油藏勘探认识与实践[M].北京:石油工业出版社,2005:126.
[5]赵翰卿.大庆油田精细储层沉积学研究[M].北京:石油工业出版社,2012:19.
[6]王建功,王天琦,卫平生,等.大型坳陷湖盆浅水三角洲沉积模式:以松辽盆地北部葡萄花油层为例[J].岩性油气藏,2007,19(2):28-34.
[7]唐海评,陈世加,张潇文,等.物性与孔喉结构对致密砂岩储层含油性的影响:以鄂尔多斯盆地华池-合水地区长7段为例[J].断块油气田,2015,22(2):198-201.
[8]秦积舜,李爱芬.油层物理[M].东营:石油大学出版社,2001:162-197.
[9]李俊,张占松.S区块低电阻率油层成因分析与评价[J].岩性油气藏,2011,23(2):105-108.
[10]蔡玥,熊琦,李勇,等.低渗透砂岩储层孔隙结构对储层质量的影响:以鄂尔多斯盆地姬塬地区长8油层组为例[J].岩性油气藏,2014,26(5):69-74.
[11]刘超威,陈世加,姚宜同,等.鄂尔多斯盆地姬塬地区长2油藏低含油饱和度成因[J].断块油气田,2015,22(3):305-308.
[12]邸世祥.中国碎屑岩储集层的孔隙结构[M].西安:西北大学出版社,1991:78.
[13]罗蛰潭,王允诚.油气储集层的孔隙结构[M].北京:科学出版社,1986:83.
[14]郑雷清.综合识别方法在低阻油气层勘探中的应用[J].岩性油气藏,2007,19(2):71-75.
[15]邹志文,斯春松,杨梦云.隔夹层成因、分布及其对油水分布的影响:以准噶尔盆地腹部莫索湾莫北地区为例[J].岩性油气藏,2010,22(3):66-99.
[16]许艳争,杜箫笙,毕明柱,等.低幅度构造油藏富集主控因素及成藏模式:以红河油田延安组油藏为例[J].断块油气田,2015,22(5):556-560.
[17]李明诚.石油与天然气运移[M].北京:石油工业出版社,1994:14.