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Thin Low-Permeability Layers Characterization and Geological Modeling of YMX Dolomite Reservoir,Tarim Basin,China

机译：中国塔里木盆地YMX白云岩储层的薄低渗透层表征及地质模型

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摘要

The high water-production stage has started in the YM dolomite reservoir.It is found that there are many thin low-permeability layers in the formation and affect the fluid flow.This paper presents a method,which characterizes the thin low-permeability layer.The method takes into consideration that the outcrop research,core,well log,porosity and permeability testing.The main controlling factors that affect the heterogeneity are identified by geological statistical knowledge.The approach combines with well logging and seismic inversion technology,quantitative study distribution of low-permeability layers.At the same time,the reservoir numerical simulation sensitivity analysis is a good job.The method offers the possibility of building the field fine geologic model and simulation model,which could describe the reasonable reservoir formation and wells production history.The results show that the thin low-permeability layers of the dolomite reservoir is closely related to lithology.The low-permeability layers developed at the bottom of the sedimentary cycle are mainly putty crystal dolomite and powder crystal dolomite,permeability is less than 0.1 mD.And the good formation is mainly developed at the top of the sedimentary cycle,fine-grained dolomite is the most lithofacies,and the permeability is between 8 mD-10 mD.The sensitivity analysis result is a good proof;the low-permeability layer could control the fluid flow in the wells production.Finally,there are 6 low-permeability layers in the YMX dolomite reservoir.And the static and dynamic model could good match the wells and oil field history.This study leads to a conclusion that the putty crystal dolomite and powder crystal dolomite formation mainly control the thin low-permeability layers;distribution and reservoir heterogeneity.The method provides a reasonable solution to the high water-cut dolomite reservoir development.
机译：高水生产阶段已经开始在YM白云岩储存器中。发现，形成中存在许多薄的低渗透层，并影响流体流动。本文提出了一种特征薄的低渗透层的方法。该方法考虑到露出研究，核心，井数，孔隙度和渗透性测试。通过地质统计知识来确定影响异质性的主要控制因素。该方法与井测井和地震反转技术相结合，定量研究分布低渗透层。同时，储层数值模拟敏感性分析是一个很好的工作。该方法提供了建立现场精细地质模型和仿真模型的可能性，可以描述合理的储层形成和井生产历史。结果表明，白云岩储层的薄低渗透层与岩性密切相关。低 - 在沉积循环底部开发的渗透性层主要是腻子晶体蛋白质和粉末晶体白云岩，渗透率小于0.1 md。并且良好的形成主要在沉积循环的顶部开发，细粒粒子是最岩石的并且渗透性在8 MD-10 MD之间。灵敏度分析结果是一个良好的证据;低渗透层可以控制井生产的流体流动。最后，YMX白云岩储层中有6层低渗透层。静态和动态模型可以良好地匹配井和油田历史。该研究导致结论是腻子晶体白云岩和粉末晶体白云岩形成主要控制薄的低渗透层;分配和储层异质性。方法提供高水分白云岩储层发育的合理解决方案。

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