高精度油气运移模拟技术在渤中19-6油气田及围区的应用

Application of high-precision hydrocarbon migration simulation technology in BZ 19-6 oil and gas field and its surrounding area

利用现有的油气运移模拟软件建立的三维地质模型无法反映砂泥岩空间叠置关系,严重影响了油气运移模拟结果的准确性与有效性。以渤海海域渤中19-6油气区及围区为例,从单井数据出发,以地震属性为约束,井震联合刻画砂体分布,建立三维地质模型,计算油源断层断面泥质含量,作为断层输导能力的定量评价标准,并在此基础上开展了全三维立体油气运移模拟。模拟结果表明,深部油气聚集主要受砂体与地貌造就的低势区的共同控制,中浅层油气聚集则主要受断层活动性与断面泥质含量高低的影响。高精度油气运移技术成功再现了渤中19-6构造成藏过程,显示了良好的应用前景。

The 3D geological model established using existing hydrocarbon migration simulation software cannot reflect the spatial superimposition relationships of sandstone and mudstone,so it is hard to accurately and effectively simulate actual hydrocarbon migration process.Taking BZ 19-6 oil and gas field and its surrounding area in Bohai Sea as a case,a 3D geological model was established from individual wells and constrained by seismic attributes,and then the mudstone percent of the source fault was calculated and taken as the quantitative evaluation standard of fault transporting capacity,and finally 3D hydrocarbon migration was simulated.It is concluded that deep hydrocarbon accumulation is mainly under the joint control of sandstone and geomorphically low-potential zones,and middle and shallow hydrocarbon accumulation is affected by fault activity and mudstone percent of fault plane.The high-precision hydrocarbon migration simulation successfully reproduced the process of hydrocarbon accumulation in BZ 19-6 structure and presents good application prospect.