储层建模研究——以J16块A油层为例

Reservoir Modeling of Oil Reservoir A in Block J16

J16块为一被南、北两条正断层夹持的背斜构造,储层岩性以细砂岩及含砾不等粒砂岩为主,属高孔、高渗储层。油层埋深1010～1132m,平面上连片分布,构造高部位油层最发育。在建立J16块储层地质模型中,主要以该区地震解释的断层数据和层面数据以及单井的分层数据为输入数据源,利用PETREL软件建立构造模型,以构造模型提供的地层格架,采用确定性建模方法,建立沉积微相模型;在微相模型基础上,采用相控建模技术,利用顺序高斯模拟方法,建立储层的物性参数模型,并根据有效储层的孔隙度、渗透率下限值进行截断,得到有效储层的三维模型。采用容积法,分层、分段进行储量计算,计算结果与原始储量计算结果基本一致。根据油藏特点及数值模拟技术的要求,设计数值模拟网格系统,将精细的地质模型转换为油藏数值模拟静态模型,满足了油藏数值模拟研究的要求。

Block J16 is an arch structure retained by two northern and southern downthrow faults.The reservoirs have fine sandstones and pebbled inequigranular sandstones mainly with high porosity and high permeability.The distribution of the reservoirs is continuous with 1010-1132m of the burial depth.The reservoirs at structural high developed well.During the geological modeling of oil reservoir A in block J16 in the western depression of Liaohe basin,we establish a structural mode using PETREL software,and then build a sedimentary microfacies model using the deterministic method taking data of fault and bedding by seismic interpretation and lamination data of the single well as the input data source in this area.Under the control of the microfacies model,the petrophysics properties models are established by using sequential Gauss method,and 3D reservoir models are constructed according to the lower limit value of porosity and permeability of the effective reservoirs.Bedding reserves may be calculated using volumetric method,and the result is almost the same as that by the original oil in place.Framework system of numerical simulation is designed according to the reservoir characteristics and technical demands.The fine geological model will be converted into static model of reservoir numerical simulation,which meets the demands of the research of numerical simulation.