埕海断裂缓坡区构造特征与油气聚集规律
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摘要
黄骅坳陷埕海断裂缓坡区具有优越的成藏背景,是油气勘探的主要领域之一。通过系统解剖埕海断坡区构造、沉积、储层及油藏特征,明确了阶状断裂斜坡油气成藏主控因素及油气富集规律,提出充足的油气源、良好的储盖组合、基岩潜山背景下的断阶构造、长期继承性发育的断层是油气成藏的主要控制因素。宽缓斜坡始终是油气运移的主要指向区,断裂、不整合面及砂岩输导层三者不同的配置关系构成了研究区多种油气运聚方式,形成了大面积、多层系的油气聚集区。高斜坡和低断阶勘探程度低、潜力大,是下一步重点勘探目标区。
The gentle slope area in Chenghai Fault Zone of Huanghua Depression was one of the main fields of oil and gas exploration because of its superior reservoir forming background.By analyzing the characteristics of the structure,sedimentary reservoirs and oil bearing areas,the main oil control factors and hydrocarbon accumulation regularity of the step fault zones were clarified.It is put forward that a sufficient oil source,good combination of reservoir and cap rocks,fault terrace structure and long-term inherited fault are the main controlling factors of oil and gas accumulation in the background of bedrock buried hill.The gentle slope is always the main region of oil and gas migration,different collocation relationships among faults,unconformity surfaces and sandstone transport beds constitute many oil and gas migration and accumulation modes in the study area.With the great potential in low exploration degree of high slope and low fault zone.It is the important target area for next exploration.
The gentle slope area in Chenghai Fault Zone of Huanghua Depression was one of the main fields of oil and gas exploration because of its superior reservoir forming background.By analyzing the characteristics of the structure,sedimentary reservoirs and oil bearing areas,the main oil control factors and hydrocarbon accumulation regularity of the step fault zones were clarified.It is put forward that a sufficient oil source,good combination of reservoir and cap rocks,fault terrace structure and long-term inherited fault are the main controlling factors of oil and gas accumulation in the background of bedrock buried hill.The gentle slope is always the main region of oil and gas migration,different collocation relationships among faults,unconformity surfaces and sandstone transport beds constitute many oil and gas migration and accumulation modes in the study area.With the great potential in low exploration degree of high slope and low fault zone.It is the important target area for next exploration.
引文
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[3]袁淑琴,于长华,董晓伟,等.歧口凹陷埕海断坡区古近系油气成藏条件与富集因素分析[J].新疆地质,2011,29(1):71~74.
[4]周立宏,卢异,肖敦清,等.渤海湾盆地歧口凹陷盆地结构构造及演化[J].天然气地球科学,2011,22(3):373~382.
[5]姜文亚,柳飒.层序地层格架中优质烃源岩分布与控制因素——以歧口凹陷古近系为例[J].中国石油勘探,2015,20(2):51~58.
[6]于学敏,何咏梅,姜文亚,等.黄骅坳陷歧口凹陷古近系烃源岩主要生烃特点[J].天然气地球科学,2011,22(6):1001~1008.
[7]高长海,查明.埕北断坡区断层对油气成藏的控制作用[J].地质找矿论丛,2011,26(1):74~78.
[8]王家豪,王华,任建业,等.黄骅坳陷中区大型斜向变换带及其油气勘探意义[J].石油学报,2010,31(3):355~360.
[9]周立宏,蒲秀刚,周建生,等.黄骅坳陷歧口凹陷古近系坡折体系聚砂控藏机制分析[J].石油实验地质,2011,33(4):371~377.
[10]高长海,查明,张新征.埕北断坡区断层输导体系与油气成藏模式[J].新疆石油地质,2007,28(6):721~724.
[11]高长海,杨子玉,查明.埕北断坡区油气成藏组合特征及分布规律[J].吉林大学学报(地球科学版),2008,38(1):63~68.
[12]高长海,查明.大港油田埕北断阶带不整合与油气运聚[J].岩性油气藏,2010,22(1):37~42.
[13]曲江秀,查明,高长海,等.大港油田埕北断阶带油气运移、成藏期次及成藏模式[J].海相油气地质,2009,14(3):37~45.
[14]周立宏,于学敏,姜文亚,等.歧口凹陷异常压力对古近系烃源岩热演化的抑制作用及其意义[J].天然气地球科学,2013,24(6):1118~1124.