通过地质力学模型评估萨哈林大陆架储层

A. K. Shatyrov
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摘要

背景。鄂霍次克海大陆架构造复杂,地球动力活动频繁,油气藏中存在非岩心陷阱,因此需要采用特殊技术来研究储层的二次过滤-体积参数。由于开口裂缝的尺寸较小,因此预测开口裂缝的位置和方向非常复杂。这些裂缝往往太小,常规测井或地震仪器无法探测到。用地震方法探测裂缝原则上是不可能的;不过,一些高分辨率测井仪器能够在有利的情况下探测到裂缝。在测井和地震勘探都无法探测到裂缝的情况下,可以使用地质力学模型。地质力学模型可以预测跨孔空间的有效孔隙度和渗透率。评估萨哈林大陆架储层的地质力学性质和次生渗透率参数。使用 ROXAR 储层建模软件评估萨哈林大陆架储层的二次滤波-体积参数。揭示了现代剪应力场。计算了每个地层的渗透率。确定了局部结构的过滤能力。
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Assessment of Sakhalin shelf reservoirs by geomechanical modeling
Background. The complex tectonic structure of the Sea of Okhotsk shelf, its high geodynamic activity and the presence of non-anticlinal traps in plays requires special technologies for studying the secondary filtration-volumetric parameters of reservoirs. The prediction of the location and direction of open fractures is complicated by their small size. Such fractures are frequently too small to be detected by such conventional logging or seismic instruments. The detection of fracturing by seismic methods is impossible in principle; however, some high-resolution logging tools are capable of detecting fractures under favorable circumstances. In cases where neither logging nor seismic exploration can detect fractures, geomechanical modeling can be used. Geomechanical modeling makes it possible to predict the effective porosity and permeability in the сrosshole space.Aim. To assess the geomechanical properties and secondary permeability parameters of the Sakhalin shelf reservoirs.Materials and methods. The ROXAR reservoir modeling software was used to assess the secondary filtration-volumetric parameters of the Sakhalin shelf reservoirs.Results. The modern shear stress field was revealed. The permeability of each stratigraphic horizon was calculated. The filtration capacity of local structures was established.
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