摘要
本文以鄂尔多斯盆地东缘临兴地区为研究对象,针对该区上古生界气层纵向叠置、横向非均质强的问题,基于前人研究成果以及大量钻探数据,研究了临兴地区致密砂岩气成藏的主控因素。研究结果表明,临兴地区上古生界为准连续型致密砂岩气藏,烃源岩厚度大(100~120 m)、成熟度高(1.0%~2.0%)、生烃能力强((14~22)×108 m3/km2),是成藏的基础;储层表现为明显的低孔(5.89%~8.22%)、低渗(0.67~1.09 mD)特征,沉积微相控制砂体展布,物性控制气藏聚集;断裂体系是气体垂向运移的关键。以上认识对有利区预测及井位部署具有较好的指导意义。
It takes Linxing area in the eastern margin of Ordos as the research object.Aiming at the problems of vertical superposition and lateral heterogeneity of Upper Paleozoic gas beds in this area,the main controlling factors of tight sandstone gas accumulation in Linxing area were studied based on previous research results and a large number of drilling data.The results show that the Upper Paleozoic quasi continuous tight sandstone gas reservoir in Linxing area is the basis of reservoir formation with large thickness of source rock(100~120 m),high maturity(1.0%~2.0%)and strong hydrocarbon generation capacity((14~22)×108 m3/km2).The reservoir is characterized by obvious low porosity(5.89%~8.22%)and low permeability(0.67~1.09 mD).Sedimentary microfacies controls the distribution of sand bodies and physical properties control the accumulation of gas reservoirs.Fault system is the key of gas vertical migration.Through the above understanding,it has a better guiding significance for the prediction of favorable area and well location deployment.
作者
赵卫
潘新志
刘亚青
孟尚志
Zhao Wei;Pan Xinzhi;Liu Yaqing;Meng Shangzhi(China United Coalbed Methane Corporation Ltd., Beijing 100011, China;CNOOC Energy Development Corporation Ltd Engineering Branch, Tianjin 300452, China;Drilling Technology Service Company, BHDC, Tianjin 300280, China)
出处
《非常规油气》
2020年第3期31-36,30,共7页
Unconventional Oil & Gas
基金
国家科技重大专项“临兴-神府地区煤系地层煤层气、致密气、页岩气合采示范工程”(2016ZX05066)资助。
关键词
鄂尔多斯盆地
临兴地区
上古生界
主控因素
Ordos Basin
Linxing area
Upper Paleozoic
main controlling factors
