Bongor盆地北部斜坡带潜山油藏特征及分布规律研究  

Study on Characteristics and Distribution Laws of Buried Hill Reservoirs in Northern Slope Belt of Bongor Basin

作　　者：于刚 Yu Gang(GWDC Geology Research Institute of CNPC,Panjin Liaoning 124010)

机构地区：[1]中国石油集团长城钻探工程有限公司地质研究院

出　　处：《中外能源》2019年第8期42-47,共6页Sino-Global Energy

基　　金：中国石油集团公司科技攻关项目“乍得Bongor盆地花岗岩潜山成藏条件分析与有利目标评价”(项目编号:2013D-902)

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.Fractures 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 300m 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 deepened.

关 键 词：Bongor盆地 潜山油藏 裂缝储层 分布规律 

分 类 号：P618.13[天文地球—矿床学]