摘要
为明确二连盆地额仁淖尔凹陷下白垩统阿尔善组致密油资源规模,利用岩心、薄片、镜下观察、油气地球化学实验参数等资料,系统研究了额仁淖尔凹陷云质岩致密油成藏特征,探讨致密油储层勘探潜力。结果表明:阿尔善组烃源岩有效厚度大,有机质丰度高且有机质类型好,处于成熟—高熟生烃阶段,具有较好的生烃潜力;主要储层岩性为泥质云岩,为低孔—中孔特低渗储层,局部发育的溶蚀孔隙和微裂缝为油气的富集提供有效的储集空间;额仁淖尔凹陷致密油具有源储一体式连续型成藏特征,小面元体积法计算资源量1.2×108 t。综合评价认为致密油有利勘探区带为淖东洼槽带中部和吉格森—包尔断裂带的淖79井—淖16井一带。
In order to determine the resource amount of Lower Cretaceous Aershan-Formation tight oil in E’rennao’er Sag of Erlian Basin,with the help of the core,thin section,microscope observation,hydrocarbon geochemistry testing parameters and so on,the accumulating characteristics of the dolomitic tight oil in E’rennao’er Sag were systematically studied,the exploration potential of the tight oil reservoirs was explored.The results show that the source rocks in Aershan Formation are characterized by big effective thickness,high abundance of the organic matter and good organic type and moreover at the maturity to high-mature hydrocarbon generation stage with much better generating potential;the main lithology of the reservoirs is pelitic dolomite,the reservoirs are with low-middle porosity and extra-low permeability,the corrosive pore and micro-fracture developed locally provide the effective spaces for accumulating the oil and gas;the tight oil reservoirs have the characteristics of the continuous source-reservoir integration accumulation in E’rennao’er Sag,the calculated resource amount by small bin volume method is 1.2×108t.The comprehensive evaluation shows that the favorable plays of the tight oil are Middle Naodong Sag and the line from Well Nao79 to Well Nao16 along Jigesen-Baoer Fracture Belt.
作者
邢雅文
冯赫青
尹峥
梁文君
王宏霞
张浩
XING Yawen;FENG Heqing;YIN Zheng;LIANG Wenjun;WANG Hongxia;ZHANG Hao(Exploration Department of PetroChina Huabei Oilfield Company, Renqiu 062552, China;Exploration and Development Research Institute of PetroChina Huabei Oilfield Company, Renqiu 062552, China;PetroChina BGP Geological Research Center, Zhuozhou 072750, China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2020年第4期159-168,共10页
Petroleum Geology & Oilfield Development in Daqing
基金
中国石油天然气股份有限公司重大科技项目“华北油田持续有效稳产勘探开发关键技术研究与应用”(2017E-15)。
关键词
二连盆地
额仁淖尔凹陷
致密油
泥质云岩
源储一体
成藏特征
勘探潜力
Erlian Basin
E’rennao’er Sag
tight oil
pelitic dolomite
source-reservoir integration
hydrocarbon accumulation characteristics
exploration potential
