东非Albert湖盆北部构造调节带解析及其油气运聚分析
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摘要
构造调节带是裂谷盆地中的一类重要构造变形体系,也成为油气聚集的有利场所。本文以东非Albert湖盆北部构造调节带为例进行解析,该调节带断裂十分发育和复杂,通过三维地震资料属性分析对构造精细解释,发现大量断块圈闭;该调节带位于盆地的缓坡带,距离湖盆生烃中心较远。北部调节带发育大型河流三角洲,成为有利储层相带的同时为油气侧向长距离运移提供通道。结合构造和沉积储层认识,建立了构造调节带的成藏模式并对油气运聚规律进行深入研究,认为网状断裂和大型河流三角洲体系的发育共同控制调节带油气运聚,该地质认识可对世界其它地区裂谷盆地中发育的构造调节带油气成藏提供一定借鉴作用。
Accommodation zone is an important tectonic deformation system in the rift basin and a favorable place for oil and gas accumulation. This paper discusses the northern accommodation zone of Lake Albert Basin of eastern Africa, where the faults are well developed and complicated. Many fault traps have been identified in this zone based on the attribute analysis and interpretation of 3D seismic data. Although the accommodation zone is located on the gentle slope and relatively long from the hydrocarbon center of the basin, the well-developed large river deltas in this area serve as the favorable reservoirs and provide quite good lateral paths for hydrocarbon migration. Combined with the understanding of regional tectonic geology and sedimentary reservoir, the author made a deep study on the hydrocarbon migration and accumulation, established the model of reservoir forming in the accumulation zone. It is concluded that the faults and sand bodies in the study area jointly controlled the migration and accumulation of hydrocarbons. The study provides a reference for the hydrocarbon accumulation in the rift accommodation zone in the similar areas.
Accommodation zone is an important tectonic deformation system in the rift basin and a favorable place for oil and gas accumulation. This paper discusses the northern accommodation zone of Lake Albert Basin of eastern Africa, where the faults are well developed and complicated. Many fault traps have been identified in this zone based on the attribute analysis and interpretation of 3D seismic data. Although the accommodation zone is located on the gentle slope and relatively long from the hydrocarbon center of the basin, the well-developed large river deltas in this area serve as the favorable reservoirs and provide quite good lateral paths for hydrocarbon migration. Combined with the understanding of regional tectonic geology and sedimentary reservoir, the author made a deep study on the hydrocarbon migration and accumulation, established the model of reservoir forming in the accumulation zone. It is concluded that the faults and sand bodies in the study area jointly controlled the migration and accumulation of hydrocarbons. The study provides a reference for the hydrocarbon accumulation in the rift accommodation zone in the similar areas.
引文
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[4]金宠,陈安清,楼爱华,等.东非构造演化与油气成藏规律初探[J].吉林大学学报(地球科学版),2012,42(S2):121-130.
[5]张兴,童晓光.艾伯特裂谷盆地含油气远景评价——极低勘探程度盆地评价实例[J].石油勘探与开发,2001,28(2):102-106.
[6]温志新,童晓光,张光亚,等.东非裂谷系盆地群石油地质特征及勘探潜力[J].中国石油勘探,2012,17(4):60-65.
[7]蔡文杰,韩文明,许志刚,等.东非Lake Albert盆地构造调节带特征及其对油气成藏的控制作用[J].地质科技情报,2015,34(4):119-123.
[8]于水,韩文明,赵伟,等.裂谷盆地陡断带三角洲沉积特征与成因模式——以东非裂谷Albertine地堑为例[J].中国海上油气,2013,25(6):31-35.
[9]张可宝,史卜庆,徐志强,等.东非地区沉积盆地油气潜力浅析[J].天然气地球科学,2008,18(6):869-874.
[10]窦立荣,王建君,程顶胜,等.乌干达Albertine地堑石油地质条件与油气勘探潜力[J].地质学报,2004,78(4):506.
[11]刘喜玲,于水,陶维祥,等.尼日尔三角洲盆地海陆过渡区油气成藏规律[J].西安石油大学学报(自然科学版),2012,27(5):27-31.
[2]Morley C K,Nelson R A,Patton T L,et al.Transfer zones in the East African Rift System and Their Relevance to Hydrocarbon Exploration in Rifts[J].AAPG Bulletin,1990,74(8):1234-1253.
[3]漆家福.裂陷盆地中的构造变换带及其石油地质意义[J].海相油气地质,2007,12(4):43-50.
[4]金宠,陈安清,楼爱华,等.东非构造演化与油气成藏规律初探[J].吉林大学学报(地球科学版),2012,42(S2):121-130.
[5]张兴,童晓光.艾伯特裂谷盆地含油气远景评价——极低勘探程度盆地评价实例[J].石油勘探与开发,2001,28(2):102-106.
[6]温志新,童晓光,张光亚,等.东非裂谷系盆地群石油地质特征及勘探潜力[J].中国石油勘探,2012,17(4):60-65.
[7]蔡文杰,韩文明,许志刚,等.东非Lake Albert盆地构造调节带特征及其对油气成藏的控制作用[J].地质科技情报,2015,34(4):119-123.
[8]于水,韩文明,赵伟,等.裂谷盆地陡断带三角洲沉积特征与成因模式——以东非裂谷Albertine地堑为例[J].中国海上油气,2013,25(6):31-35.
[9]张可宝,史卜庆,徐志强,等.东非地区沉积盆地油气潜力浅析[J].天然气地球科学,2008,18(6):869-874.
[10]窦立荣,王建君,程顶胜,等.乌干达Albertine地堑石油地质条件与油气勘探潜力[J].地质学报,2004,78(4):506.
[11]刘喜玲,于水,陶维祥,等.尼日尔三角洲盆地海陆过渡区油气成藏规律[J].西安石油大学学报(自然科学版),2012,27(5):27-31.