共查询到20条相似文献，搜索用时 75 毫秒
1.
孔隙型碳酸盐岩储层的化学及机械沉积作用使得各沉积微相空间上不具备碎屑岩储层沉积微相明确的几何形态和外部结构,且不同成因储层的物性差异明显。依据常规的沉积微相建模方法难以如实地再现不同微相复杂的空间展布规律,进而也降低了相控属性建模的精度。本文以中东H油田白垩系Mishrif组生物碎屑灰岩为研究对象,通过开展波阻抗、孔隙度和渗透率的反演,利用机器学习的方法建立研究区的三维沉积微相模型。在此基础上,通过不同微相的变差函数分析,开展相控属性建模。结果表明,利用机器学习方法建立的沉积微相模型符合海相碳酸盐岩台地相序变化规律,充分体现了微相的空间形态和各微相间的接触关系,以沉积微相为约束条件建立的储层属性模型不仅满足了模拟结果与已知数据的概率一致性问题,又能分相带反映储层的空间变化特征。 相似文献
2.
储层沉积微相是影响储层非均质性的重要因素之一,准确预测储层沉积微相分布对认识储层非均质性、提高油田油气采收率具有重要意义.储层随机建模方法具有很强的地质适用性,合理选择随机建模方法能够有效提高模型精度.以东濮凹陷濮城油田沙三中亚段6-10水下扇油藏为例,由于水下扇沉积储层微相具有几何构型及空间分布复杂的特点,选择序贯指示建模可以对不同微相采用不同变差函数来表征其空间分布结构特征,从而再现储层微相复杂的空间分布.通过定义沟道吻合程度参数Mat对模拟实现进行检验,抽稀井沟道吻合程度参数Mat平均值达到84.7%,表明建模结果具有较高的准确度.序贯指示建模适合于建立水下扇储层沉积微相模型. 相似文献
3.
准噶尔盆地三台凸起上侏罗统齐古组一段(J3q1)沉积相类型一直较难确定,制约了油气勘探。充分运用地质、地震属性和地震反演等研究方法,综合分析认为研究区属冲积扇沉积,主要为扇中—扇缘沉积,并对扇中—扇缘沉积微相特征进行了分析,储层主要为辫状河河道砂体。对齐古组一段储层砂体属冲积扇扇中—扇缘沉积成因的新认识,有助于正确认识和预测储层分布及非均质性,确定潜在的勘探评价目标。在研究区周缘齐古组内以冲积扇扇中或扇缘为勘探和评价目标,有望发现岩性、构造或构造-岩性油气藏圈闭。 相似文献
4.
《海洋地质前沿》2021,37(3)
基于沉积微相研究和测井精细解释数据统计分析,开展了涠西南凹陷W区古近系始新统流沙港组储层非均质性研究。W区储层为流一段和流三段,沉积微相研究表明,流沙港组主要为正常三角洲相和扇三角洲相沉积。储层夹层岩性主要为泥岩、粉砂质泥岩,主要成因为分流水道间、水下分流河道与砂坝、砂坝与砂坝、辫流坝与辫状水道、辫状水道间的泥质沉积物。非均质性研究以沉积微相为基础进行,通过比较不同沉积微相的非均质性差别,分析储层的空间物性变化。非均质性研究表明,WA油田流一段夹层厚度5 m的占51.4%,单层夹层层数5个的占27.4%,变异系数平均值1.2,整体上非均质性很强;WB油田流三段夹层分布均匀,东南部平面非均质性弱,西北部平面非均质强;WC和WD油田流三段整体上夹层多,但平面非均质性弱。依据非均质研究成果,对密井网的WA油田主力层进行了剩余油分布预测,并部署了2口调整井挖潜,实施后累增油4.2×10~4 t,采收率提高了2.3%。表明储层夹层分布和平面非均质性研究可以为油田剩余油挖潜提供依据,对油田高效开发具有重要意义。 相似文献
5.
以张店油田为研究对象，在储层构造、沉积微相、测井解释、储层非均质等研究基础上，建立地质数据库，应用三维可视化技术建立三维模型，通过储层三维模型，实现了油田开发地质研究工作中沉积微相研究成果的量化应用及与储层参数分布的有效结合。 相似文献
6.
7.
8.
子洲气田榆30井区精细地质建模与潜力分析 总被引：1，自引：0，他引：1
《海洋地质前沿》2010,(12)
三维地质特征模型是油气藏描述的重要手段,对子洲气田榆30井区进行了精细地质建模,在地震解释、测井解释、沉积微相、小层对比、录井解释、物性分析等工作的基础上,建立了该井区的三维精细地质模型,实现了沉积微相研究成果的量化应用及与储层参数分布的有效结合,并在此基础上对该地区的剩余油分布和勘探开发潜力进行了分析。 相似文献
9.
高集油田位于金湖凹陷西斜坡中段,被断层切割成许多小断块,研究区就是其中主力区块之一。在各种基础数据校正、整理和分析的基础上,对研究区断层分布特征及储层特征进行了详细研究,应用地质统计学、储层沉积学、构造地质学的基本原理,建立了三维构造精细模型;并结合平面相及剖面相分布特征研究,应用截断高斯和序贯指示两种模拟方法对沉积微相建模进行了对比分析,建立了研究区沉积微相模型。最后,利用相控建模技术,建立了研究区相控属性模型(孔隙度模型和渗透率模型),使孔渗参数的平面及纵向分布在微相内部插值计算,更符合实际地质情况。 相似文献
10.
11.
13.
We propose a new information technology aimed at modeling of biochemical processes in marine ecosystems and based on the use of logical operators of control (intelligent agents) in the dynamic equations of the models. We develop a conceptual model of an ecosystem reflecting the interaction of 17 biochemical processes and 5 external factors. The equations of the model are obtained by the method of adaptive balance of causes (ABC method), which enables one to simulate complex scenarios of the processes running in the investigated systems and guarantees the possibility of robust calculations. Some examples of the behavior of ecosystems under the conditions of deficiency of oxygen caused by the action of natural and anthropogenic factors are presented. As a result, it is possible to make a conclusion that the combined application of the ABC-equations and intelligent agents of control in models of marine ecosystems is quite promising. 相似文献
14.
Oceanology - An approximate method of direct modeling of three-dimensional surface waves based on the complete equations of the potential motion of a liquid with a free surface in a curved... 相似文献
15.
Izvestiya, Atmospheric and Oceanic Physics - The paper describes characteristics of numerical models of surface waves based on full equations for the flow with free surface in potential... 相似文献
16.
17.
We propose a method for the construction of dynamic-stochastic models of natural systems based on the assimilation of the data of observations in the prognostic equations of coupled processes. In these models, the method of adaptive balance of causes is used to deduce evolutionary equations of the analyzed processes and assimilate the data of observations in these equations. The deduced general equations are considered for an example of a marine ecosystem characterized by the development of four coupled processes. It is shown that the optimal prediction of these processes requires the solution of 11 systems of equations with simultaneous adaptation of prognostic estimates and the coefficients of the models to the data of observations. A numerical simulation experiment explaining the algorithm of the proposed method of modeling is considered. A conclusion is made that the application of this method in the geoinformation systems of monitoring of the environment is quite promising.__________Translated from Morskoi Gidrofizicheskii Zhurnal, No. 6, pp. 31–42, November–December, 2004. 相似文献
18.
Basic information on the distribution and habitat preferences of ecologically important species is essential for their management and protection. In the Mediterranean Sea there is increasing concern over elasmobranch species because their biological (ecological) characteristics make them highly vulnerable to fishing pressure. Their removal could affect the structure and function of marine ecosystems, inducing changes in trophic interactions at the community level due to the selective elimination of predators or prey species, competitors and species replacement. In this study Bayesian hierarchical spatial models are used to map the sensitive habitats of the three most caught elasmobranch species (Galeus melastomus, Scyliorhinus canicula, Etmopterus spinax) in the western Mediterranean Sea, based on fishery-dependent bottom trawl data. Results show that habitats associated with hard substrata and sandy beds, mainly in deep waters and with a high seabed gradient, have a greater probability registering the presence of the studied species than those associated with muddy shallow waters. Temperature and chlorophyll-α concentration show a negative relationship with S. canicula occurrence. Our results identify some of the sensitive habitats for elasmobranchs in the western Mediterranean Sea (GSA06 South), providing essential and easy-to-use interpretation tools, such as predictive distribution maps, with the final aim of improving management and conservation of these vulnerable species. 相似文献
19.
《Oceanic Engineering, IEEE Journal of》2008,33(2):158-170
20.
Hiroyasu Hasumi 《Journal of Oceanography》2002,58(1):25-33
This paper reviews recent progress and problems in modeling the thermohaline circulation of the world ocean by use of z-coordinate ocean general circulation models. Discussions focus on four issues: sea surface forcing, mixing in the deep ocean
interior, eddy-induced tracer transport, and bottom boundary layer processes. Although some widely used techniques and parameterizations
deal with these issues, some aspects are still overlooked and more sophistication is certainly required.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献