Bongor盆地北部斜坡带潜山油藏特征及分布规律研究
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摘要
Bongor盆地北部斜坡带的潜山油藏为中国石油乍得油气合作区重要的增储上产目标。自2013年以来,经过重新采集三维地震数据,精心刻画成藏组合,结合单井试油成果,相继发现了Baobab、Mimosa、Phoenix、Raphia和Lanea五大潜山含油气富集带。通过对五个潜山带构造、储层及油藏特征的分析,进一步明确了Bongor盆地北部斜坡带潜山油藏的特征及分布规律,为潜山断块的滚动勘探开发、快速建产、规模效益开发提供依据。潜山油藏多为构造成因,以断块油藏为主,断层分布控制着油源运移,后期的封堵条件也是潜山油气富集的关键因素。潜山油藏的储层主要以裂缝为主,同时也发育受风化淋滤作用形成的孔洞。油藏平面分布上具有南北分带,东西分区的特点及规律,纵向上油气主要发育于潜山顶部300m范围内,油藏类型主要以块状及似层状为主,内幕油藏的认识有待于进一步加深。
Buried hill reservoirs in the northern slope belt of Bongor Basin are the important targets of CNPC oil and gas cooperation zone in Chad for production increasing.Since 2013,five buried hill hydrocarbon accumulation zones including Baobab,Mimosa,Phoenix,Raphia and Lanea have been discovered in succession after 3D seismic data re-acquisition and hydrocarbon accumulation combination based on oil test results for single well.Based on the analysis of the structure and reservoir characteristics of five buried hill zones,the characteristics and distribution laws of the buried hill reservoirs in the northern slope belt of Bongor Basin are further known,which provide a basis for the rolling exploration and development,putting into production quickly,and scale development with benefit in the buried hill fault blocks.The genesis of buried hill reservoirs which are dominated by fault blocks is mostly tectonic,and the distribution of faults controls oil source migration,and later plugging conditions are the key factors of oil and gas enrichment in the buried hill.Frac-tures are the main reservoirs in this area,and pores formed by weathering-leaching also developed.The oil reservoirs have the characteristics and laws of zoning in north-south and partitioning in east-west respectively on the plane.Oil and gas mainly developed within 300 m of the top of the buried hill vertically.The types of reservoirs are massive and stratified-like.The understanding of the inner reservoirs needs to be further deep-ened.
Buried hill reservoirs in the northern slope belt of Bongor Basin are the important targets of CNPC oil and gas cooperation zone in Chad for production increasing.Since 2013,five buried hill hydrocarbon accumulation zones including Baobab,Mimosa,Phoenix,Raphia and Lanea have been discovered in succession after 3D seismic data re-acquisition and hydrocarbon accumulation combination based on oil test results for single well.Based on the analysis of the structure and reservoir characteristics of five buried hill zones,the characteristics and distribution laws of the buried hill reservoirs in the northern slope belt of Bongor Basin are further known,which provide a basis for the rolling exploration and development,putting into production quickly,and scale development with benefit in the buried hill fault blocks.The genesis of buried hill reservoirs which are dominated by fault blocks is mostly tectonic,and the distribution of faults controls oil source migration,and later plugging conditions are the key factors of oil and gas enrichment in the buried hill.Frac-tures are the main reservoirs in this area,and pores formed by weathering-leaching also developed.The oil reservoirs have the characteristics and laws of zoning in north-south and partitioning in east-west respectively on the plane.Oil and gas mainly developed within 300 m of the top of the buried hill vertically.The types of reservoirs are massive and stratified-like.The understanding of the inner reservoirs needs to be further deep-ened.
引文
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[10]谢文彦，孟卫工，张占文，等.辽河坳陷潜山内幕多期裂缝油藏成藏模式[J]．石油勘探与开发，2006,33(6):649-652．
[11]赵贤正，吴兆徽，闫宝义，等．冀中坳陷潜山内幕油气藏类型与分布规律[J]．新疆石油地质，2010,31(1):4-6.
[2]窦立荣，肖坤叶，胡勇，等.乍得Bongor盆地石油地质特征及成藏模式[J]．石油学报，2011,32(3):379-386．
[3]张艺琼，何登发，童晓光．中非剪切带含油气盆地成因机制与构造类型[J]．石油学报，2015,36(10):1234-1247．
[4]肖坤叶，赵健，余朝华，等．中非裂谷系Bongor盆地强反转裂谷构造特征及其对油气成藏的影响[J]．地学前缘，2014,32(3):172-180.
[5]宋红日，窦立荣，肖坤叶，等.Bongor盆地油气成藏地质条件及分布规律初探[J].石油与天然气地质，2009,30(6):762-767.
[6]宋换新，文志刚，陈晓娜．非洲B盆地轻质油地球化学特征与成因类型研究[J]．石油天然气学报，2012,34(8):23-26．
[7]李威，窦立荣，文志刚，等．乍得Bongor盆地潜山油气成因和成藏过程[J]．石油学报，2017,38(11):1253-1262．
[8]窦立荣，魏小东，王景春，等．乍得Bongor盆地花岗质基岩潜山储层特征[J]．石油学报，2015,36(8):897-904．
[9]窦立荣，潘校华，田作基，等．苏丹裂谷盆地油气藏的形成与分布-兼与中国东部裂谷盆地对比分析[J]．石油勘探与开发，2006,33(3):255-261．
[10]谢文彦，孟卫工，张占文，等.辽河坳陷潜山内幕多期裂缝油藏成藏模式[J]．石油勘探与开发，2006,33(6):649-652．
[11]赵贤正，吴兆徽，闫宝义，等．冀中坳陷潜山内幕油气藏类型与分布规律[J]．新疆石油地质，2010,31(1):4-6.